Absolute Process Instruments API 4008 G _ Potentiometer input transmitter. Fully isolated.
Cecomp Electronics, API 4008 G, Potentiometer to DC Isolated Signal Conditioner, 18 Field Configurable Output
Features:
- Accepts Wide Range of Potentiometers
- Set-up via External Rotary Switches
- Easy-to-use Setup Tables
- Selectable Voltage or Current Outputs
- 2000 VRMS Isolation Input/Output/Power
- Input and Output LoopTracker® LEDs
- Functional Test Button
Applications:
- Over, Under, Out-of-Range Position Monitoring
- Remote Control of Positioning Devices
- Simplify Control of Potentiometer Outputs
The API 4008 G 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 API 4008 G will accept any potentiometer with a value of 0-100 Ω through 0-1 MΩ without recalibration and without affecting accuracy as long as 100% of the potentiometer range is used.
The API 4008 G output can be field-configured via external rotary and slide switches. 10 DC voltage or 8 DC current ranges can be selected from the table on the module.
The full 3-way (input, output, power) isolation makes this module useful for ground loop elimination, common mode signal rejection or noise pickup reduction.
Output Loop Power Supply
The API 4008 G has an 20 VDC loop excitation supply for the output. This power supply can be used to power a passive mA device.
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:
| Potentiometer Input Ranges | Full travel of potentiometer and 3 wire connection required
Consult factory for other ranges and configurations |
| Input Impedance | 10 MΩ minimum |
| Common Mode Rejection | 100 dB minimum |
| DC Output Range | Field selectable ranges via switch settings
|
| Output Logic | Normal acting (standard). Reverse acting by reversing potentiometer wires |
| Calibration | Multi-turn zero and span potentiometers for output (±15% of span adjustment range typical) |
| Output Loop Power Supply | 20 VDC nominal, regulated, 25 mADC, max. ripple <10 mVRMS |
| Output Test | 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 |
|
| Response Time | 70 milliseconds typical |
| Isolation |
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| Installation Environment |
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| Power | 115 VAC ±10%, 50/60 Hz, 2.5 W max. |
