Intrinsically Safe preamplifiers certified to CSA (with NRTL/C) and LCIE to ATEX (94/9/EC). They are available for Class I, Zone 0, IIC and II 1 G EEx ia IIC T4 or Class I, Zone 0, IIA and II 1 G EEx ia IIA T4 hazardous locations.

Features and Specifications

Input Power:

13 to 30 VDC, 35 mA @24 VDC
(Class I, Zone 0, IIC models)

7.5 to 30 VDC, 10 mA @ < 10 VDC
(Class I, Zone 0, IIA models)

Reverse polarity protected

RF Sensor Input:

Modulation carrier frequency: 20 KHz

Input frequency: 2 Hz to 5 KHz, adjustable trigger level

Carrier adjustment: to allow precise tuning of carrier signal to physical environment (e.g., air gap, wall thickness)

Max. air gap: 0.160"

Preferred coil inductance: 1.0 mH +/- 10%

Max. distance from sensor to preamp: 100'

VR Sensor Input:

Input protected, RF and band pass filtered

Input frequency: 0 to 10 KHz, adjustable trigger level

Trigger sensitivity: 10 mV RMS min. (note: at 10 mV frequency range 10 Hz to 3 KHz)

Input impedance: 40K ohms (nominal)

Max. input signal: 600 volts RMS

Max. distance from sensor to preamp: 100'

Pulse Output Options:

All output options must be factory installed

Open collector Vmos transistor, maximum OFF voltage 30 VDC; maximum ON current

TTL/CMOS (standard) fanout of 5 TTL/CMOS loads

Temperature Range:

Operating: -40°F to +185°F
(-40°C to +85°C)

Storage: -40°F to +302°F
(-40°C to +150°C)

Enclosures:

Unit is intended for mounting in a conduit box. Enclosure is not required (unless using in Class II and III locations in which must be enclosed in an approved Class II/III enclosure) but recommended to protect unit from moisture, dirt, etc.

Optional explosion proof box available upon request

Entity Parameters:

Group IIC

To barrier:
Vmax/Ui = 30 VDC, Imax/Ii = 200 mA
Ci/Ci = 0.0uF, Li/Li = 0.50 mH

To sensor:
Voc/Uo = 5.9 VDC, Isc/Io = 64 mA
Ca/Co = 1 uF, La/Li = 3.5 mH

Approvals:

Intrinsically safe to CSA (with NRTL/C) and LCIE to ATEX (94/9/EC).

CE compliant to EMC Directive 89/336/EEC for use in residential, commercial, light industrial and heavy industrial environments

Warranty:

Unconditional one (1) year warranty if used within specifications

Physical Dimensions:

Board diameter: 2.75"

Center mounting holes: 2" and 2.5

BEI Electronic Modules for Optical Encoders

Optical Isolator Module

This DIN rail mounted encoder interface lets you connect an encoder to a variety of controllers, or to multiple input devices. It provides an optically isolated signal and is available with one of four output driver options making it compatible with all major counter, drive and PLC components. Multiple modules can be daisy-chained together and drive as many as eight different devices from a single encoder.

The interface module also provides LED output indicators for two quadrature channels and an index. All circuitry for the module is packaged in a housing that mounts to a standard external DIN rail. For ease of installation, a 75 mm length of DIN rail is supplied with each module.

Anti-Dither Module

This module performs a specialized yet critical function for applications that may be subject to position errors due to stop/start cycles or vibration environments that are not using the direction-detection functions provided by a quadrature signal. The Anti- Dither module accepts A and B signals and, through internal discrimination circuitry. passes the signals through only when there has been true movement of the encoder. This acts like 1/4 cycle of hysteresis and avoids encoder signal transition dithering due to mechanical vibration. This is especially useful in web processes, handling and inspection systems that use conveyors and simple speed control in applications that are subject to vibration.

Intrinsic Safety Barrier

This Galvanically Isolated Intrinsic Safety Barrier is the perfect complement to BEI encoders for hazardous environments. It is electrically compatible with all popular counters, PLCs and controllers, and it features isolation for power and three signal channels, as well as LED indicators for power and data - all in a single DIN rail package.

The BEI Barrier carries, CENELEC, UL and cUL ratings and is suitable for long cable runs. Since it also carries a nonincendive designation per the National Electrical Code, it can be mounted in Class 1, Division 2 areas.

Encoder Tester Module

This test module accepts input from any type of incremental optical encoder. It tests for two channels in quadrature, an index pulse, and power to the module. It features a simple and intuitive LED indicator scheme: lights are on to indicate that a signal is HI and off when the signal goes LO. Through combinations of terminal connections and dropping resistors (supplied), it can test open collector outputs, and both single ended and differential outputs at all standard voltages: 5VDC, 12-15 VDC, and 24 VDC. This tester can also be used for machine set-up (by locating the index pulse) and incoming inspection and diagnostics of encoded motors.

Serial-to-Parallel Converter Module

The serial to parallel converter takes serial data from either a SSI or RS-422 source and converts it to a 15 bit parallel output. This replaces the high cost and noise susceptibility of long, parallel cable runs with the simplicity of a low cost twisted pair cable to interface to a parallel-input PLC or controller. Serial input type is selectable along with clock speed (for SSI) or baud (for RS422). This module accepts inputs from 5 to 28 VDC and has output options of Vout-Vin, Vout=5V regulated or Vout = Open Collector.

*** FOR ADDITIONAL ASSISTANCE PLEASE CALL 800-350-2727

SW20XX-EX,This Isolation Switching Barrier can detect switch or approach switch's status in locations where hazardous exists; isolate, transmit and output it to safe area. Input and output can be set to inverse control. Approach switch open circuit detection function. Isolation between Input/ Output/Power source.

FEATURES：

• Fitted devices:

1. NAMUR Sensors; 2. Mechanical Joints.

• Phase-angel and inverse control setting;
• Open circuit detection setting
• Respective Isolation(2,500VDC between Input/Output/Power source);
• Operation Temperature:-20℃-+60℃
• Reliable Performance (MTBF>1,000,000 Hours).

Patent Protection

Download: PDF

Over 30 years of Arjay's field proven HF capacitance technology has been applied to the 9830-PCD plugged chute detectors. The flush mount sensor continuously monitors the change from a normal material chute condition to a plugged condition.

• capacitance technology responds to any material type
• no moving parts
• remote alarm unit mounts safely away from pipe
• no intrusion into chute or hopper

The 9830-PCD sensor monitors the capacitance field in front of the sensor plate. The sensing plate forms part of the chute or hopper wall to sense the product within. The increased presence of product in front of the sensor due to a plugging condition increases the capacitance field and initiates an alarm.

The sensing plates are embedded into a polyethylene plate which provides monitoring without any intrusion into the product flow.

Features & Benefits:

• flush mount sensor forms part of the chute wall
• adjustable time delay and sensitivity to eliminate nuisance alarms
• remote electronics via standard twisted pair
• available with Intrinsic Safety Barrier for Hazardous Locations
• high erosion resistant polyethylene resists wear
• capacitance technology responds to all types of bulk materials
• non-intrusive sensor design does not restrict product movement

Technical Specifications - Control Unit:

• Operating Temperature: -20°C to 60°C
• Power Input: 24 vdc or 110 vac or 220 vac
• Alarm Relay: 5 amp, DPDT, dry
• Standards: UL, CSA
• Enclosure: Type 4X, IP65
• Optional: Lights and Buzzer

Technical Specifications - Sensor:

• Operating Temperature: 0°C to 50°C
• Approval: CSA Class 1, Zone 2, Div 2, Groups A,B,C,D (also available with an Intrinsic Barrier Option)

Intrinsic safety is considered the safest method of operating electrical equipment in potentially explosive atmospheres. The use of intrinsically safe components is a reliable alternative to explosion-proof enclosures. I.S. systems must use approved solenoids (Clippard's EI series solenoids) and approved intrinsic safety barriers.

The EI Series of valves are offered with manifold and flush mounts. Connections can be made by using an AMP connector, direct wire leads, or wire leads with direct conduit connection. All valves maintain the same electrical operating characteristics.

• Non-Contacting Ultrasonic Sensor
• Large, 4-Digit LCD Display
• 10-Digit Totalizer
• Isolated 4-20mA (1000 ohm)
• 3 Programmable Control Relays
• Automatic Sensitivity Adjustment
• New Signal Processing System
• Intrinsically Safe Sensor Option
• Built-in 3-Key Calibrator
• RFI Rejection Filters

DFM 4.0 Doppler Flow Meter

Measure flow from outside a pipe. The Greyline DFM 4.0 is ideal for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. There is no obstruction to flow and no pressure drop. The standard, strap-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger. The electronics/display enclosure can be mounted nearby.

Use the isolated 4-20mA to transmit flow to remote displays, recorders or controllers. The 3 programmable relays can be used for flow control, pump protection or flow proportionate pulse. Calibration is easy with the built-in 3-key calibrator. Display and totalize flow in your choice of engineering units (gallons, liters etc.)

Sensor cable can be extended up to 500 ft. (152 m) with no loss of signal. The DFM 4.0 can be equipped with intrinsic safety barriers for sensor installation in hazardous rated locations. Other options include high temperature sensors and a built-in 50,000 point Data Logger.

The DFM 4.0 includes a new digital signal processor to filter background noise and interference and to measure flow rates accurately in liquids containing gas bubbles or solids particles.