Absolute Process Instruments APD 44L3 D _ Specify VDC or mADC range
Cecomp Electronics, APD 44L3 D, DC to DC Signal Conditioner Low Select Function from 3 Inputs, 9-30VDC/10-32VAC Power
Features:
- Versions to Follow the Highest or the Lowest Input
- 1200 V Input/Output/Power Isolation
- Input LoopTracker® LED
- Zero and Span Output Calibration Potentiometers
- Functional Test Button
- Built-In Loop Power Supply for Output
Applications:
- Track Highest or Lowest of Multiple Input Signals
- Monitor Maximum Flow From Multiple Pumps
- Sensor Redundancy
The APD 44L3 D accepts 3 voltage or current inputs, depending on the model. They provide an optically isolated DC voltage or current output that is linearly related to the highest or lowest of the inputs, depending on the model.
They are used where the highest or lowest of multiple inputs are required to drive the output, or where sensor redundancy is needed. Full 3-way isolation (input, output, power) makes this module useful for ground loop elimination, common mode signal rejection or noise pickup reduction. The inputs are not isolated from each other.
The APD 44L3 D Transmittor can be wired to allow a mA output to be either sinking (passive) or sourcing (active).
LoopTracker
API exclusive features include a green LoopTracker LED that varies in intensity with changes in the process input signal. It provides a quick indication of your process input at all times and can greatly aid in saving time during initial startup and/or troubleshooting.
Functional Test
An API exclusive feature includes the Functional Test Button to provide a fixed output (independent of the input) when enabled. The test output level is potentiometer adjustable from 0 to 100% of output span. The functional test button greatly aids in saving time during initial startup and/or troubleshooting.
Specifications Table:
| Input | 0-50 mV to 0-10 VDC, ±25mV to ±10VDC, 0-1 mA to 0-20 mADC, ±0.5 to ±20 mA
Factory Configured: Low select from 3 inputs. Specify 3 input ranges. |
| Output | 0-1 V to ±10 VDC or 0-2 mA to 0-20 mA, 4-20 mA. Specify VDC or mADC range. |
| DC Input Range | Factory configured, please specify each input range. Consult factory for special ranges and/or functions. Each input can have different ranges and/or units. Specify order of math functions if required. Milliamp inputs are sinking.
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| Input Impedance |
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| Balance Between Inputs | Better than ±0.5% of span |
| DC Output Range | Factory configured, please specify output range
Milliamp output can be field wired for sink or source |
| Output Calibration | Multi-turn zero and span potentiometers for each output channel±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 | Front button sets output to test level. Enabled via pushbutton.
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| Output Ripple and Noise | Less than ±0.2% of span |
| Linearity | Better than ±0.25% of span |
| Ambient Temperature Range and Stability | 10°C to +60°C operating ambientBetter than ±0.02% of span per °C stability |
| Response Time | 50 milliseconds, nominal per channel used |
| Isolation | 1200 VRMS minimum
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| Housing |
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| Connectors | Four 4-terminal removable connectors, 14 AWG max wire size |
| Power | 9-30 VDC or 10-32 VAC 50/60 Hz, 4 W maximum |
