The Series AP5103 DIN-rail Amplifier is a low cost, easy-to-use, general-purpose singlechannel conditioner designed for input of pressure, force, torque, weight, and other variables measured by standard DC-excited strain gage transducers. DIN mount construction gives the user ready access to screw terminal connections for power, analog output, shunt,
and sensor signals. The AP5103 provides exceptional signal stability and accuracy over a wide range of sensor inputs. A powerful low-pass active filter, selectable by the user, removes unwanted high-frequency measurement-signal components. This DIN-rail signal conditioner provides filtered analog output of ±5Vdc, ±10Vdc, or 4-20 mA which are switch selectable by the user. The AP5103 will accommodate a wide range of full bridge DC strain gage sensors with bridge resistance for 120 to 10K Ohm. The Series AP5103 is especially user friendly because it features external, front panel accessible settings for mode, volts, current, filter, excitation and zero. It is an excellent complement to STI’s mV/V miniature and subminiature load cells/force sensors and miniature pressure transducers. The AP5103 DIN-rail signal conditioner is also available in an in-line fully enclosed housing configuration
as the Series AP5201

Description
The Series AP5201 In-Line Amplifier is a low cost, easy-to-use, general purpose single-channel conditioner designed for input of pressure, force, torque, weight, and other variables measured by conventional DC-excited strain gage transducers. It is ideal for applications where the transducer is exposed to conditions of high temperature, high humidity, or corrosiveness and where the signal conditioning can be placed in-line and removed from the transducer’s environment. Advanced analog design solves the problem of measurement inaccuracy in environments with high electromechanical noise. The AP5201 provides filtered analog output of ±5Vdc, ±10Vdc, or 4-20 mA; switch selectable by the user. Zero and span adjustments are made through coarse rotary switches and potentiometers. This in-line amplifier will accommodate a wide range of full bridge DC strain gage sensors with bridge resistance for 120 to 10K Ohm. The AP5201 is an excellent complement to STI’s mV/V miniature and subminiature load cells/force sensors and miniature pressure transducers. The AP5201 signal conditioner housing is available in a DIN-rail configuration as the Series AP5103.

Standard Features
• Filtered Analog Outputs: ±0 to 5 Vdc, ±0 to 10 Vdc, 4-20 mA
• Accepts Standard Full Strain Gage Bridges of 120 Ù to 10K Ù
• User Friendly DIP Switch Settings for Mode, Volts, Current,
Filter, Excitation, Zero
• Wide Zero & Span Adjustment
• Wide Input Power Range of 11 – 28 Vdc ±10%, 100 mA max
• Field Selectable Bridge Excitation: 2.5 Vdc or 5.0 Vdc
• Switch-Based Shunt Calibration
• Power Status Indicator
• Rugged ABS Flame Retardant Housing

Description
The Series AP5202 is an in-line DC amplifier designed to provide variable bridge excitation and signal conditioning for Stellar Technologies’ strain gaged, mV/V pressure transducers, load cells, force sensors, and reaction torque transducers. The AP5202 provides up to 10V output or 4-20 mA output with transducer signals from 10 mV to 10V. This in-line amplifier accepts both uni-polar to bi-polar input signals and can produce corresponding uni-polar and bi-polar voltage outputs. Current outputs are uni-polar.
This in-line amplifier provides variable transducer bridge excitation of 3V to 10V. Excitation, coarse gain, fine gain, and fine zero adjustment are provided. In addition, the capability of connecting remotely to an internal shunt calibration resistor is provided. All connections are made using screw-terminals mounted inside the AP5202’s durable aluminum enclosure. The aluminum enclosure has an IP65 ingress protection rating.

Standard Features
• Compatible With Full Bridge Strain Gage Transducers
• Rugged IP65 Aluminum Enclosure
• Variable Bridge Excitation of 3V to 10V
• Voltage and Current Outputs
• Accepts Both Uni-polar and Bi-Polar Inputs
• Internal Shunt Calibration Resistor
• Internal Gain and Zero Adjustments

Description
The AP5101 Series is a DIN-rail mounted single channel DC amplifier designed to provide variable excitation and signal conditioning for Stellar Technology’s strain gaged, mV/V, pressure transducers, load cells, force sensors, and reaction torque sensors. This DIN-rail amplifier provides
up to 10V output or 4-20 mA output with transducer signals from 10 mV to 10V. This amplifier accepts both uni-polar or bipolar input signals and can produce corresponding uni-polar and bi-polar voltage outputs. Current outputs are uni-polar. The AP5101 incorporates a DC-DC converter that ensures the output of the unit is electrically isolated from the supply. The DIN-rail housing is constructed of a high-impact thermoplastics case with recessed screw-clamp terminals for all connections and a 25-turn zero and fine gain adjustment accessible from the front panel.
A push switch and the capability to connect remotely to an internal shunt calibration resistor are also located on the front panel. Excitation, coarse gain and switches to filter the output, are internal and easily accessible by disengaging the front panel and board assembly from the housing.

Standard Features
• Standard DIN-rail Package
• Voltage and Current Output
• Accepts Most Full Bridge Strain Gage Transducers
• Input/Output Isolation
• Broad Range of Inputs (4mV to 10V)
• Selectable Transducer Bridge Excitation of 3-10 Vdc
• Accepts Both Uni-Polar and Bi-Polar Inputs
• Zero and Fine Gain Adjust From Front Panel
• Remote Shunt Calibration From Front Panel
• Internal Coarse Gain Easily Accessible
• Internal Filters Easily Accessible
• Bridge Completion Capable

The AP5102 Series is a DIN-rail mounted signal conditioner for use with LVDT's (linear variable differential transformer) requiring AC excitation and synchronous demodulation. The AP5102 produces outputs of 0-10 Vdc, ±10 Vdc, or 4-20 mA. One of the key features of this DIN-rail amplifier is that it incorporates a DC-DC converter which ensures the output of the unit is isolated from the supply. The DIN mount housing is constructed of high-impact thermoplastic and has recessed screw-clamp terminals for all connections. Zero and span adjustments are made directly from the front panel with 25-turn trimpots. All other controls are internal including coarse gain and zero, zero input switch, jumper links for master/slave setting, and excitation frequency setting. All internal settings are easily accessible by disengaging the front panel and board assembly from the housing. The AP5102 is compatible with the complete range of Stellar Technology AC/AC LVDT transducers.

The Series AP5104 DIN-rail Amplifier is a high reliability conditioner for measurement of displacement with an LVDT (linear variable differential transformer). It can be used with 4, 5, and 6-wire LVDT’s. The AP5104 provides regulated AC excitation with remote sensing for applications which may require cable lengths greater than 20 feet. The analog output of the AP5104 DIN mount signal conditioner can be switched using the front panel controls for ±5 Vdc , ±10 Vdc, or 4-20mA. These analog outputs are filtered using a low-pass active filter that removes unwanted high-frequency measurement-signal components and thus eliminates aliasing errors. The Series AP5104 is designed for a very wide range of signals for 16 to 1600 mV/V full scale. The AP5104 has a phase shift adjustment feature used to synchronize primary and secondary phase shift due to LVDT winding inductance and cabling. LVDT setup and calibration is simplified because configuration and all adjustments are performed through the front panel controls. There is no need for the user to open the DIN enclosure for jumper or switch settings changes. The DIN mount housing is designed with non-removable screw terminals.

The Series AP50XX is a reliable, rugged signal conditioner
with a variety of acceptable inputs and available outputs. The
unit is enclosed in a stainless steel housing and is protected
against environmental conditions including vibration. Options
include a variety of electical terminations, EMI filtering,
voltage clipping, surge protection, shunting and scaling
The brief specifications listed on the back are but a few of the
more important parameters of interest; make sure to contact
the sales office closest to you for further definition. In most
cases, independent data sheets support these applications
and provide additional information.