Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SCP461-11 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.4 kg |
| Dimensions | 3.8 cm x 11.4 cm x 13 cm |
| Operating Temp | -10 deg C to +55 deg C |
| Power Supply | 24 VDC |
| Input Range | Voltage: +/-100 mV to +/-10 V, Current: 4-20 mA, Thermocouple |
| Output Range | Voltage: 0-10 V, Current: 4-20 mA |
| Accuracy | +/-0.1% of full scale |
| Response Time | <= 250 ms |
| Isolation Voltage | 1500 VAC |
Analog Signal Processing and Cold Junction Compensation
The module executes precision analog signal conversion, integrating high-grade cold junction compensation (CJC) circuitry to maintain measurement accuracy for thermocouple inputs. It supports standard industrial input loops and delivers isolated voltage and current outputs. Channel isolation up to 1500 VAC prevents ground loops and electromagnetic interference across process control environments.
Frequently Asked Questions
Q: What is the power supply requirement for this hardware module?
A: The unit operates on a standard 24 VDC external power supply to maintain its operational circuitry and isolation barriers.
Q: Is field calibration required after initial mounting?
A: The internal firmware applies factory-calibrated scaling for the specified input ranges, maintaining an accuracy of +/-0.1% of full scale under normal operating conditions.
Field Installation Guidelines
- Ensure the 24 VDC power supply is completely isolated and powered off prior to module insertion or extraction from the rack.
- Maintain proper vertical clearance around the 3.8 cm x 11.4 cm x 13 cm housing to facilitate natural convection cooling within the -10 deg C to +55 deg C operating temperature range.
- Terminate all incoming thermocouple and 4-20 mA signal shield wires directly to the designated cabinet earth ground bar to reduce electromagnetic interference.
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