Absolute Process Instruments APD 4008 _ Potentiometer input transmitter. Fully isolated.
Cecomp Electronics, APD 4008, Potentiometer to DC Isolated Signal Conditioner, 18 Field Configurable Output, 85-265 VAC, 60-300 VDC Power
Features:
- One Minute Setup for Hundreds of I/O Ranges
- External Switches & Table for Range Selection
- Removable Plugs for Faster Installation
- Full 1200 V Input/Output/Power Isolation
- Input and Output LoopTracker® LEDs
- Functional Output Test Button
- Selectable Sink/Source for Current Output
Applications:
- Over, Under, Out-of-Range Position Monitoring
- Remote Control of Positioning Devices
- Simplify Control of Potentiometer Outputs
The APD 4008 accepts a resistance input from potentiometer, slidewire, linear position, displacement, or rotational devices and provides an optically isolated DC voltage or current output that is linearly related to the potentiometer position.
The APD 4008 will accept any potentiometer with a value of 0-100 Ω through 0-1 MΩ without recalibration and without affecting accuracy. The APD 4008 output can be field-configured via external rotary and slide switches. Offsets and/or input ranges other than 0 to 100% of the potentiometer range can also be selected.
The full 3-way (input, output, power) isolation makes this module useful for ground loop elimination, common mode signal rejection or noise pickup reduction.
Sink/Source Output
The APD 4008 has a 20 VDC loop excitation supply for the output. This power supply can be used to power a passive mA device. If not required, the APD 4008 output can be wired as a passive output. Sinking/sourcing versatility allows the APD 4008 to produce a powered or unpowered mA output allowing it to work with powered or unpowered mA devices.
LoopTracker
API exclusive features include two LoopTracker LEDs (green for input, red for output) that vary in intensity with changes in the process input and output signals. These provide a quick visual picture of your process loop at all times and can greatly aid in saving time during initial startup and/or troubleshooting.
Output Test An
API exclusive feature includes the test button to provide a fixed output (independent of the input) when held depressed. The test output level is potentiometer adjustable from 0 to 100% of output span. The output test button greatly aids in saving time during initial startup and/or troubleshooting.
Specifications Table:
| Input | 100 Ω to 1 MΩ Potentiometers, 0 to 90% Offset |
| Output | 0-1 V to ±10 VDC, or 0-2 mA to 20 mADC |
| Potentiometer Input |
|
| Input Impedance | 10 MΩ minimum |
| Common Mode Rejection | 120 dB minimum |
| DC Output Range | Field selectable ranges via switch settings
|
| Output Logic | Normal |
| Output Calibration | Multi-turn zero and span potentiometers ±15% of span adjustment range typical |
| Output Loop Power Supply | 20 VDC nominal, regulated, 25 mADC, <10 mVRMS max. ripple May be selectively wired for sinking or sourcing mA output |
| Output Test/Override | Front button sets output to test level when pressed or via external contact closure. Potentiometer adjustable 0-100% of span |
| Output Ripple and Noise | Less than 10 mVRMS |
| Linearity | Better than ±0.1% of span |
| Ambient Temperature Range and Stability | 10°C to +60°C operating ambient |
| Response Time | 70 milliseconds nominal |
| Isolation | 1200 VRMS minimum, Full isolation: power to input, power to output, input to output |
| Connectors | Four 4-terminal removable connectors, 14 AWG max wire size |
| Power | 85-265 VAC, 50/60 Hz or 60-300 VDC, 2 W maximum |
