Overview
Configured for contact signal acquisition in Yokogawa ProSafe-RS safety control systems, the Yokogawa SDV144-S63 (SDV144 Digital Input Module) provides direct electrical execution for field contact monitoring through isolated input channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SDV144-S63 |
| Brand | Yokogawa |
| Origin | Japan |
| Product Type | Digital Input Module |
| Input Channels | 18-channel, module isolation |
| Input Signal | No-voltage contact signal |
| Contact Input ON | 1 kOhm maximum |
| Contact Input OFF | 100 kOhm minimum |
| Input Current | 6 mA +/- 20 % |
| External Power Supply | 24 VDC +20 % / -10 %, current capacity 200 mA |
| Contact Rating | 24 VDC +20 % / -10 %, 10 mA or greater |
| Instantaneous Maximum Input Voltage | 30.0 VDC |
| Input Response Time | 40 ms maximum |
| Withstand Voltage | 2 kVAC between input signal and system, 18-input line collectively connected |
| Current Consumption | 290 mA maximum at 5 VDC; 140 mA maximum at 24 VDC |
| Weight | 0.36 kg with pressure clamp terminal block or MIL cable; 0.41 kg with signal cable interface adapter |
| Mounting Location | Safety node unit and safety control unit |
| Redundancy Function | Supports dual-redundant configuration |
Channel Isolation and Safety Signal Processing
The Yokogawa SDV144-S63 uses isolated input channels to process field contact signals within the ProSafe-RS safety system. The module accepts no-voltage contact inputs and monitors ON/OFF states through defined resistance thresholds. In addition, the module supports dual-redundant installation when configured with compatible terminal accessories.
For process safety applications, the module design follows Yokogawa ProSafe-RS hardware architecture, where channel-to-channel isolation separates field wiring conditions from internal system circuits. Therefore, external contact disturbances have limited influence on other input channels.
Frequently Asked Questions
Q: What type of field signals does the SDV144-S63 accept?
A: The SDV144-S63 accepts no-voltage contact signals. The input detects ON status at 1 kOhm maximum resistance and OFF status at 100 kOhm minimum resistance.
Q: Can the SDV144-S63 operate in a redundant configuration?
A: Yes. The SDV144-S63 supports dual-redundant configuration when installed with compatible redundancy terminal components.
Q: What external power supply does the module require?
A: The module requires a 24 VDC external power supply with +20 % / -10 % tolerance and a current capacity of 200 mA.
Field Installation Guidelines
Install the SDV144-S63 on the designated ProSafe-RS safety node unit or safety control unit according to Yokogawa hardware installation procedures.
Use proper field wiring separation between contact input cables and high-voltage power lines. Maintain correct terminal connections to prevent signal polarity or grounding issues.
For MIL cable or pressure clamp terminal block installations, verify mechanical locking and cable retention before system commissioning.
Connect cable shields according to the site grounding standard. Avoid parallel routing with high-noise power conductors to reduce electrical interference.
Before operation, confirm input resistance values, external 24 VDC supply stability, and safety system diagnostic status.
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