The 1U family of programmable AC-DC power supplies sets a new standard for flexible and reliable power for your application. Available in a Rack Mounting or Benchtop at 720W power levels with single output voltages ranging from 3.3 to 135V and current capabilities up to 70A.

A user-friendly front panel provides reliable linear controls for finer adjustment and optional digital LED Voltage and Current meters. Standard features include, ‘soft start' operation, and "no load" operation; Short circuit and overload protection, Thermal protection, Internal EMI Filtering, RFI Shielding and Remote Sensing.

Optional digital interfaces including RS232, RS485, Ethernet, and USB available upon request.

Features

• Universal input
• Power Factor Correction
• Constant voltage and constant current modes
• Short circuit and overload protection
• Thermal protection
• No minimum load required
• Internal EMI Filter and RFI Shielding
• Pluggable connectors for input and control wiring
• Remote Sensing
• ‘Soft start’ operation

The 1U family of programmable AC-DC power supplies sets a new standard for flexible and reliable power for your application. Available in a Rack Mounting or Benchtop at 720W power levels with single output voltages ranging from 3.3 to 135V and current capabilities up to 70A.

A user-friendly front panel provides reliable linear controls for finer adjustment and optional digital LED Voltage and Current meters. Standard features include, ‘soft start' operation, and "no load" operation; Short circuit and overload protection, Thermal protection, Internal EMI Filtering, RFI Shielding and Remote Sensing.

Optional digital interfaces including RS232, RS485, Ethernet, and USB available upon request.

Features

• Universal input
• Power Factor Correction
• Constant voltage and constant current modes
• Short circuit and overload protection
• Thermal protection
• No minimum load required
• Internal EMI Filter and RFI Shielding
• Pluggable connectors for input and control wiring
• Remote Sensing
• ‘Soft start’ operation

We have thousands of power supply models, but if you can't find what you need in our standard stand alone models, we can fill your needs with one of our Power Systems. (We can also easily modify power supplies to meet customer requirements.)

Simply ‘check’ or fill in whichever items you require. Since the possibilities are endless, use the ‘Notes/special instructions’ sections for anything not covered in the Custom Power Supply System Builder. Or contact us about your needs by phone or fax: Phone: (610) 258-5441 · (800) 523-9478 · Fax: (610) 258-2842

Standard Features

• Highly Configurable, with a seemingly Infinite number of Options
• Any slot voltage from 1.5v to 150v is available
• Remote Sensing
• Open Sense protection
• Isolated output
• Short circuit and overload protection with enhanced surge capabilities
• No minimum load required
• Internal EMI Filtering
• Pluggable connectors
• Can be mounted on two surfaces in any orientation

Standard Features

• Highly Configurable, with a seemingly Infinite number of Options
• Remote Sensing
• Open Sense protection
• Isolated output
• Short circuit and overload protection with enhanced surge capabilities
• No minimum load required
• Internal EMI Filtering
• Pluggable connectors
• Can be mounted on two surfaces in any orientation

Series A
High Performance (model numbers begin with the letter A)

A broad selection of power supplies offering unusually high performance - many models have regulation of ±0.005%. Electronic current limiting and provision for remote voltage sensing are standard features; overvoltage protection is available as a built-in option. Rugged extruded aluminum cases include threaded mounting holes on bottom, back, and side, permitting mounting in any position.

Provision for remote sensing and/or external output adjustment.
Short circuit proof with automatic recovery (electronic current limiting).

Series B
General Purpose (model numbers begin with the letter B)

These versatile supplies are ideal for powering digital circuitry, test sets, instrument bridges, and process control transmitters. Many models have regulation of ±0.1% or better. All components are generously derated to insure a long and trouble-free life, and they use the same rugged construction as the Series A line. Overvoltage protection and other options are available.

Short circuit proof (electronic current limiting).

Power supplies with the broad adjustment capability required for analog instrumentation and circuitry, electronic system development, basic research, and similar applications.

For applications requiring a current regulation or adjustable current limiting, select a power supply with a true constant current characteristic (model numbers beginning with the letter P).

Voltage programmable using resistance.

These power supplies have the broad adjustment capability required for analog instrumentation and circuitry, process controls, basic research, and similar applications.

The output voltage may be manually controlled either at the power supply or remotely, or it may be programmed with the analog output from a PLC or digital-to-analog converter.

Dual isolated output power supplies may be connected to provide any desired arrangement of positive and negative output voltages. Each voltage is independently adjustable. No derating is required up to +60°C. A separate overvoltage protector on each output is available as a built-in option.

Triple isolated output power supplies provide the features and characteristics of three supplies in one compact, easy-to-use package. They are available in the voltage combinations most frequently required for driving microprocessors and associated circuitry.

Acopian general purpose duals furnish two completely independent outputs, either identical or different, in less space and at less cost than two equivalent single output supplies. Thousands of output voltage/current rating combinations are available. Mounting and system wiring are simplified. Quality components, generously derated, insure long-term reliability.

These dual output power supplies are a convenient source of the tracking voltages required for powering operational amplifiers and related circuits. Their positive/common/negative output terminal configuration minimizes system wiring. Provisions for remote sensing permits compensation of load line effects. Although moderately priced, they are sturdily constructed and conservatively rated.

Line and load regulation of ±0.05%, and typical ripple of 15 mVrms, are indicative of the high performance of these power supplies. LED indicators signal normal operation and overvoltage protection latchup. Input has EMI filter and inrush protection. Their outputs may be inhibited with a TTL level.

Line and load regulation of ±0.05%, and typical ripple of 15 mVrms, are indicative of the high performance of these power supplies. LED indicators signal normal operation and overvoltage protection latchup. Input has EMI filter and inrush protection. Their outputs may be inhibited with a TTL level.

Low-cost DC power suitable for driving loads such as lamps, relays, and small motors is provided by Series U unregulated power supplies. All components are generously derated, insuring a long and trouble-free life; built-in fusing prevents damage due to prolonged overloading or short circuits. Mechanically similar to the regulated supplies, they are housed in extruded aluminum cases which can be mounted in any position. Many models are U.L. Recognized.

Features

• Fused input.
• May be used in series or parallel.
• No derating or heat sinking required.

Low-cost DC power suitable for driving loads such as lamps, relays and small motors is provided by these unregulated power supplies. All components are generously derated, assuring a long and trouble-free life; built-in fusing prevents damage due to prolonged overloading or short circuits. They are housed in extruded aluminum cases which can be mounted in any position.

Low-cost DC power suitable for driving loads such as lamps, relays and small motors is provided by these unregulated power supplies. All components are generously derated, assuring a long and trouble-free life; built-in fusing prevents damage due to prolonged overloading or short circuits. They are housed in extruded aluminum cases which can be mounted in any position.

Standard Features:

• Universal input.
• Power Factor Correction.
• Output Inhibit
• Constant voltage and constant current modes.
• Voltage and current monitor terminals.
• Voltage and current programming capabilities.
• Short circuit and overload protection.
• Thermal protection.
• Low Profile.
• No minimum load required.
• Adjustable down to 0 volts (‘Wide Adjust’ models).
• Internal EMI Filter and RFI Shielding.
• Pluggable connectors for input and control wiring.
• Remote Sensing.
• ‘Vout OK’ signal monitor.
• ‘Soft start’ operation.

Standard Features

• Universal input.
• Power Factor Correction.
• Output Inhibit.
• Constant voltage and constant current modes.
• Voltage and current monitor terminals.
• Voltage and current programming capabilities.
• Short circuit and overload protection.
• Thermal protection.
• Low Profile.
• No minimum load required.
• Adjustable down to 0 volts (‘Wide Adjust’ models).
• Can be paralleled for increased current (option P).
• N+1 Redundancy (option N).
• Internal EMI Filter and RFI Shielding.
• Pluggable connectors for input and control wiring.
• Remote Sensing.
• ‘Vout OK’ signal monitor.
• ‘Soft start’ operation.

Switching Regulated Power Supplies (to 900 watts)Power Factor Correction and Universal Input

Although small in size, these mini-modules offer high performance at modest prices. All models, with series regulated outputs ranging from 1 to 75 volts and as high as 2.5 amps, may be mounted in an area only 3.5" x 2.5". Terminal strip input/output connections eliminate all need for sockets or soldering. Short circuit protection, encapsulated construction, and conservative design assure long term reliability.

• May be used in series.
• No derating or heat sinking required.
• Short circuit protected.

Conserve space with mini-modules as small as 2.3" x 1.8" x 1.0". Models with outputs ranging from 1 to 75 volts, and from 30 mA to 2.5 amps are available. All feature excellent regulation and ripple parameters, and are short circuit protected.

Rugged encapsulated construction and generously derated components assure years of reliable operation. Mini-modules are also available with multiple outputs.

• May be used in series.
• No derating or heat sinking required.
• Short circuit protected.

These dual tracking output mini-modules are compact and convenient sources of the voltages required to power operational amplifiers and related circuits.

They may be mounted directly on printed circuit board assemblies, simplifying system layout and minimizing the connectors and wiring required.

Features

• May be used in series.
• No derating or heat sinking required.
• Short circuit protected.

These versatile power supplies mount in a surface area of only 3.5" x 2.5", and are available in a choice of mounting styles. They have a high efficiency and may be operated through a wide temperature range. A common-mode input filter reduces conducted noise, and the shielded case minimizes radiated energy. Their outputs may be used in either polarity, and may be precisely trimmed.

Features

• Accepts DC input (120-180 Vdc).
• Accepts AC input (85-130 VAC, 47-420 Hz, single phase).
• Compact, lightweight, fully encapsulated.
• Short circuit and overload protected.
• No heat sinking or forced air required.
• Input/output isolation.
• Extensive EMI filtering and shielding.

These versatile power supplies mount in a surface area of only 3.5" x 2.5", and are available in a choice of mounting styles. They have a high efficiency and may be operated through a wide temperature range. A common-mode input filter reduces conducted noise, and the shielded case minimizes radiated energy. Their outputs may be used in either polarity, and may be precisely trimmed.

Features

• Accepts DC input (120-180 Vdc).
• Accepts AC input (85-130 VAC, 47-420 Hz, single phase).
• Compact, lightweight, fully encapsulated
• Short circuit and overload protected.
• No heat sinking or forced air required.
• Input/output isolation.
• Extensive EMI filtering and shielding.

Although small in size, these mini-modules offer high performance at modest prices. They provide the voltages commonly required for driving op amps and other balanced loads and may be mounted in an area only 3.5" x 2.5". Terminal strip input/output connections eliminate all need for sockets or soldering. Short circuit protection, encapsulated construction, and conservative design assure long term reliability.

Features

• May be used in series.
• No derating or heat sinking required.
• Short circuit protected.

An Acopian Redundant Power Package is installed by simply connecting the AC input and DC output terminals. All wiring (including isolation diodes, output monitor circuits, switches, meters, adjustments and connectors) has been done for you.

Output Redundancy: Each Redundant Power Package contains two identical power supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate it from the system output, and pass only the output of the other supply with no interruption of output power during the transition.

Input Redundancy: All Acopian Redundant Power Packages may be operated with only one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources of input power may be used, to obtain the additional protection of input redundancy. A battery- backup power source (UPS) and/or a second power line from the power utility can be used to maintain output power without interruption when your primary source of AC power fails.

Applications: Redundant Power Packages should be considered for any equipment where the highest attainable reliability is essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal systems, and security/safety alarm systems.

Theory of Operation: Each Redundant Power Package consists of the two power supplies installed in either a Rack Mounting or Wall Mounting assembly. The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply. Under this condition, the backup supply's diode is not forward biased; only the primary supply delivers current to the load. If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup supply delivers load current. There is no interruption of output power during the transition.

Serviceability: A defective power supply can be rapidly and safely changed while the Redundant Power Package continues to furnish uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack Mounting models or on the front for Wall Mounting models. For Rack Mounting models, the chassis slide and handle options are recommended for applications where it is desired to service the Redundant Power Package without removing it from the rack.

Monitoring Circuitry: The Redundant Power Package contains two voltage monitoring circuits with relays, contacts of which are available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than 2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.

Overvoltage Protection: Automatic recovery. Each power supply contains an overvoltage protection circuit, to assure that neither power supply output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and misadjustment.

An Acopian Redundant Power Package is installed by simply connecting the AC input and DC output terminals. All wiring (including isolation diodes, output monitor circuits, switches, meters, adjustments and connectors) has been done for you.

Output Redundancy: Each Redundant Power Package contains two identical power supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate it from the system output, and pass only the output of the other supply with no interruption of output power during the transition.

Input Redundancy: All Acopian Redundant Power Packages may be operated with only one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources of input power may be used, to obtain the additional protection of input redundancy. A battery- backup power source (UPS) and/or a second power line from the power utility can be used to maintain output power without interruption when your primary source of AC power fails.

Applications: Redundant Power Packages should be considered for any equipment where the highest attainable reliability is essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal systems, and security/safety alarm systems.

Theory of Operation: Each Redundant Power Package consists of the two power supplies installed in either a Rack Mounting or Wall Mounting assembly. The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply. Under this condition, the backup supply's diode is not forward biased; only the primary supply delivers current to the load. If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup supply delivers load current. There is no interruption of output power during the transition.

Serviceability: A defective power supply can be rapidly and safely changed while the Redundant Power Package continues to furnish uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack Mounting models or on the front for Wall Mounting models. For Rack Mounting models, the chassis slide and handle options are recommended for applications where it is desired to service the Redundant Power Package without removing it from the rack.

Monitoring Circuitry: The Redundant Power Package contains two voltage monitoring circuits with relays, contacts of which are available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than 2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.

Overvoltage Protection: Automatic recovery. Each power supply contains an overvoltage protection circuit, to assure that neither power supply output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and misadjustment.

Where only a narrow mounting space is available, Acopian Narrow Profile power supplies fit where many others cannot. Choose from Series A (high performance - model numbers begin with the letter A) and Series B (general purpose - model numbers begin with the letter B) models with output ratings up to 150 volts, up to 3.5 amps.

Power supplies with the broad adjustment capability required for analog instrumentation and circuitry, electronic system development, basic research, and similar applications.

Where only a narrow mounting space is available, Acopian Narrow Profile power supplies fit where many others cannot.

Voltage programmable using resistance.

These dual output power supplies are a convenient source of the tracking voltages required for powering operational amplifiers and related circuits. Their positive/common/negative output terminal configuration minimizes system wiring. Provision for remote sensing permits compensation of load line effects. Although moderately priced, they are sturdily constructed and conservatively rated.

These Narrow Profile switchers include convection cooled models less than 7" long that provide outputs up to 75 watts and fan cooled models less than 8" long that provide outputs to 120 watts.

• Internal EMI Filter and Shielding
• Pluggable Input/output Terminal Block
• Excellent Load/line Regulation
• Overcurrent, Overvoltage Protection
• No Minimum Load Required

Small yet providing up to 288 watts of well regulated DC, these supplies can be mounted in spaces where many others won’t fit. A metal case fully encloses all circuitry and provides EMI shielding and an AC input filter attenuates both common and differential mode noise conducted to the line.

Feature

• Universal input.
• Accepts AC input (90-265 VAC, 49-420 Hz, single phase).
• Accepts DC input (110-350 Vdc).
• Power Factor Correction.
• High surge current capability.
• ‘Soft start’ operation.

An Acopian Plug-in power module can be installed in a matter of seconds. Simply plug it into a standard octal(8-pin) socket. No other mounting is required. (Threaded mounting holes are provided in the base for fastening the module when used in other than the upright position, or if subject to extreme vibration.)

To replace a module - for example, where added circuitry calls for a higher current rating - just unplug the old, plug in the new. No need to touch any wiring. And as a result of years of product refinement, your Acopian Plug-in provides the highest reliability of any available series-regulated power supply.

Features

• May be used in series.
• Delivers current surges without damage - to protect against prolonged overload and shorts, use of an input fuse is recommended.
• No derating or additional heat sinking required.

Space-saving Acopian duals combine two electrically independent DC outputs in a single case. Either identical or different outputs may be selected. And every combination is supplied with Acopian's usual 3-day shipment guarantee and 5-year warranty.

Like all Acopian Plug-ins, a dual-output module can be installed in seconds. Simply plug it into a standard 11-pin socket. Acopian duals are exceptionally dependable, too - offering the highest reliability of any available series-regulated power supply.

Dual tracking output Plug-in power supplies provide the balanced voltages commonly required for driving operational amplifiers and related linear circuitry. The convenient plug-in configuration simplifies mounting and wiring, and connections for the remote sensing of the output voltages, to permit compensation of load line voltage drops, are a standard feature.

An Acopian Plug-in power module can be installed in a matter of seconds. Simply plug it into a standard octal(8-pin) socket. Nothing else is ordinarily necessary. (Threaded mounting holes are provided in the base for fastening the module when used in other than the upright position, or if subject to extreme vibration.)

To replace a module - for example, where added circuitry calls for a higher current rating - just unplug the old, plug in the new. No need to touch any wiring. And as a result of years of product refinement, your Acopian Plug-in provides the highest reliability of any available series-regulated power supply.

Features

• May be used in series.
• Delivers current surges without damage-to protect against prolonged overload and shorts, use of an input fuse is recommended.
• No derating or additional heat sinking required.

An Acopian Plug-in power module can be installed in a matter of seconds. Simply plug it into a standard octal(8-pin) socket. Nothing else is ordinarily necessary. (Threaded mounting holes are provided in the base for fastening the module when used in other than the upright position, or if subject to extreme vibration.)

To replace a module - for example, where added circuitry calls for a higher current rating - just unplug the old, plug in the new. No need to touch any wiring. And as a result of years of product refinement, your Acopian Plug-in provides the highest reliability of any available series-regulated power supply.

Features

• May be used in series.
• Delivers current surges without damage-to protect against prolonged overload and shorts, use of an input fuse is recommended.
• No derating or additional heat sinking required.

To meet the need for unregulated DC power at a low cost, Acopian offers a broad line of Plug-in power modules with output voltages to 950 volts.

There is no need to use tiedown hardware unless it is mounted in other than an upright position, or where shock and vibration will be encountered.

Features

• Capacitive filtering.
• Fused input.
• May be used in series or parallel.
• No derating or heat sinking required.

To meet the need for unregulated DC power at low cost, Acopian offers a broad line of fully adjustable Plug-in power modules with output voltages to 950 volts.

There is no need to use tiedown hardware unless the power supply is mounted in other than an upright position, or where shock and vibration will be encountered.

Features

• Fused input.
• May be used in series or parallel.
• No derating or heat sinking required

To meet the need for unregulated DC power at low cost, Acopian offers a broad line of fully adjustable Plug-in power modules with output voltages to 950 volts.

There is no need to use tiedown hardware unless the power supply is mounted in other than an upright position, or where shock and vibration will be encountered.

Features

• Fused input.
• May be used in series or parallel.
• No derating or heat sinking required

To meet the need for unregulated DC power at low cost, Acopian offers a broad line of fully adjustable Plug-in power modules with output voltages to 950 volts.

There is no need to use tiedown hardware unless the power supply is mounted in other than an upright position, or where shock and vibration will be encountered.

Features

• Fused input.
• May be used in series or parallel.
• No derating or heat sinking required

An Acopian Redundant Power Package is installed by simply connecting the AC input and DC output terminals. All wiring (including isolation diodes, output monitor circuits, switches, meters, adjustments and connectors) has been done for you.

Output Redundancy: Each Redundant Power Package contains two identical power supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate it from the system output, and pass only the output of the other supply with no interruption of output power during the transition.

Input Redundancy: All Acopian Redundant Power Packages may be operated with only one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources of input power may be used, to obtain the additional protection of input redundancy. A battery- backup power source (UPS) and/or a second power line from the power utility can be used to maintain output power without interruption when your primary source of AC power fails.

Applications: Redundant Power Packages should be considered for any equipment where the highest attainable reliability is essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal systems, and security/safety alarm systems.

Theory of Operation: Each Redundant Power Package consists of the two power supplies installed in either a Rack Mounting or Wall Mounting assembly. The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply. Under this condition, the backup supply's diode is not forward biased; only the primary supply delivers current to the load. If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup supply delivers load current. There is no interruption of output power during the transition.

Serviceability: A defective power supply can be rapidly and safely changed while the Redundant Power Package continues to furnish uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack Mounting models or on the front for Wall Mounting models. For Rack Mounting models, the chassis slide and handle options are recommended for applications where it is desired to service the Redundant Power Package without removing it from the rack.

Monitoring Circuitry: The Redundant Power Package contains two voltage monitoring circuits with relays, contacts of which are available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than 2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.

Overvoltage Protection: Automatic recovery. Each power supply contains an overvoltage protection circuit, to assure that neither power supply output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and misadjustment.

All models may be programmed through their voltage ranges by means of external resistance. Models with adjustable current limiting have a constant-voltage/constant-current crossover characteristic, and so may be used as current regulated power supplies.

Voltage programmable using resistance.

Acopian Rack Mounting power supplies feature excellent regulation and ripple specifications with outputs up to 150 volts and 60 amps. Metering and overvoltage protection are available as options. These power supplies are constructed in sturdy extruded aluminum assemblies designed expressly for mounting in standard 19" wide RETMA cabinet racks. The front panels are finished in light gray enamel.

These power supplies have the broad adjustment capability required for analog instrumentation and circuitry, process controls, basic research, and similar applications.

The output voltage may be manually controlled either at the power supply or remotely, or it may be programmed with the analog output from a PLC or digital-to-analog converter.

These power supplies are constructed in sturdy extruded aluminum assemblies designed expressly for mounting in standard 19" wide RETMA cabinet racks. The front panels are finished in light gray enamel.

An Acopian Redundant Power Package is installed by simply connecting the AC input and DC output terminals. All wiring (including isolation diodes, output monitor circuits, switches, meters, adjustments and connectors) has been done for you.

Output Redundancy: Each Redundant Power Package contains two identical power supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate it from the system output, and pass only the output of the other supply with no interruption of output power during the transition.

Input Redundancy: All Acopian Redundant Power Packages may be operated with only one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources of input power may be used, to obtain the additional protection of input redundancy. A battery- backup power source (UPS) and/or a second power line from the power utility can be used to maintain output power without interruption when your primary source of AC power fails.

Applications: Redundant Power Packages should be considered for any equipment where the highest attainable reliability is essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal systems, and security/safety alarm systems.

Theory of Operation: Each Redundant Power Package consists of the two power supplies installed in either a Rack Mounting or Wall Mounting assembly. The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply. Under this condition, the backup supply's diode is not forward biased; only the primary supply delivers current to the load. If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup supply delivers load current. There is no interruption of output power during the transition.

Serviceability: A defective power supply can be rapidly and safely changed while the Redundant Power Package continues to furnish uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack Mounting models or on the front for Wall Mounting models. For Rack Mounting models, the chassis slide and handle options are recommended for applications where it is desired to service the Redundant Power Package without removing it from the rack.

Monitoring Circuitry: The Redundant Power Package contains two voltage monitoring circuits with relays, contacts of which are available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than 2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.

Overvoltage Protection: Automatic recovery. Each power supply contains an overvoltage protection circuit, to assure that neither power supply output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and misadjustment.

An Acopian Redundant Power Package is installed by simply connecting the AC input and DC output terminals. All wiring (including isolation diodes, output monitor circuits, switches, meters, adjustments and connectors) has been done for you.

Output Redundancy: Each Redundant Power Package contains two identical power supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate it from the system output, and pass only the output of the other supply with no interruption of output power during the transition.

Input Redundancy: All Acopian Redundant Power Packages may be operated with only one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources of input power may be used, to obtain the additional protection of input redundancy. A battery- backup power source (UPS) and/or a second power line from the power utility can be used to maintain output power without interruption when your primary source of AC power fails.

Applications: Redundant Power Packages should be considered for any equipment where the highest attainable reliability is essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal systems, and security/safety alarm systems.

Theory of Operation: Each Redundant Power Package consists of the two power supplies installed in either a Rack Mounting or Wall Mounting assembly. The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply. Under this condition, the backup supply's diode is not forward biased; only the primary supply delivers current to the load. If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup supply delivers load current. There is no interruption of output power during the transition.

Serviceability: A defective power supply can be rapidly and safely changed while the Redundant Power Package continues to furnish uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack Mounting models or on the front for Wall Mounting models. For Rack Mounting models, the chassis slide and handle options are recommended for applications where it is desired to service the Redundant Power Package without removing it from the rack.

Monitoring Circuitry: The Redundant Power Package contains two voltage monitoring circuits with relays, contacts of which are available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than 2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.

Overvoltage Protection: Automatic recovery. Each power supply contains an overvoltage protection circuit, to assure that neither power supply output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and misadjustment.