Overview
Configured for field signal termination and interface wiring in Yokogawa CENTUM VP and CS Series DCS environments, the Yokogawa S9681DB-0 (S9681DB Terminal Board Module) provides direct physical and electrical signal connections. The module supports 32 channels and accommodates analog, digital, and HART-related field connections according to the provided configuration data.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | S9681DB-0 |
| Base Model | S9681DB |
| Brand | Yokogawa |
| Product Type | Terminal Board Module |
| Compatible Systems | Yokogawa CENTUM VP / CS Series DCS |
| Number of Channels | 32 |
| Input Types | Analog, Digital, HART |
| Input Range | -32 V to +32 V |
| Current Input Range | 0-20 mA, 4-20 mA |
| Output Type | Relay |
| Output Load Rating | 2 A at 250 VAC |
| Power Supply | 24 VDC |
| Power Consumption | 5 W |
| Operating Temp | -20 deg C to +60 deg C |
| Storage Temp | -40 deg C to +80 deg C |
| Ambient Humidity | 0-95% RH, non-condensing |
| Dimensions | Approx. 120 mm x 160 mm x 40 mm |
| Weight | Approx. 0.5 kg |
| Origin | Japan |
4-20 mA HART Signal Interface Characteristics
The Yokogawa S9681DB-0 supports field-side signal connections associated with analog, digital, and HART instrumentation. In particular, 4-20 mA loop wiring requires correct terminal identification and polarity control during installation. HART communication signals can coexist with the DC analog signal where the connected system and field device configuration support the protocol.
Therefore, technicians should maintain appropriate separation between signal wiring and high-power conductors. Shield termination practices should also follow the applicable Yokogawa system documentation and site grounding design.
Frequently Asked Questions
Q: How many channels does the S9681DB-0 provide?
A: The provided specification identifies 32 channels for field signal and terminal connections.
Q: What electrical signal types are listed for the S9681DB-0?
A: The module is specified for analog, digital, and HART-related connections, with listed ranges including -32 V to +32 V, 0-20 mA, and 4-20 mA.
Q: What power supply is specified for the S9681DB-0?
A: The provided data specifies a 24 VDC power supply and a power consumption of 5 W.
Field Installation Guidelines
Before installation, disconnect system power and confirm that the terminal board location matches the applicable control cabinet documentation.
Install the Yokogawa S9681DB-0 in the designated mounting position and secure the module using the approved cabinet hardware. Route analog and digital field wiring separately from high-current or switching power conductors where practical.
Verify terminal assignments before applying field signals. For 4-20 mA circuits, check loop polarity and continuity. For shielded cables, terminate the shield according to the system grounding architecture to reduce noise coupling and ground-loop effects.
After wiring, inspect terminal tightness, conductor insulation, and cable routing. Finally, apply power and verify each connected channel through the applicable Yokogawa DCS diagnostic or commissioning procedure.
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