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Configured for high-density signal distribution in CENTUM control systems, the Yokogawa S9879UK (S9879UK Analog Input Connector Unit) provides direct physical/electrical execution of field-to-backplane wiring termination.
| Parameter | Specification |
|---|---|
| Model | S9879UK |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.3 kg |
| Dimensions | 50 mm x 32.8 mm x 107.5 mm |
| Operating Temp | -20 deg C to 70 deg C |
| Power Consumption | Passive Component |
| Contact Resistance | <= 5 mOhm |
| Rated Current | 5 A per channel |
| Insulation Material | UL94 V-0 flame-retardant plastic |
The S9879UK facilitates connectivity within CENTUM VP and CS 3000 architectures by maintaining a consistent 4-20 mA HART loop protocol environment for analog inputs. The unit utilizes channel-to-channel isolation architecture, which is critical when managing multiple heterogeneous sensor inputs in a single cabinet. To maintain measurement precision, the terminal design accounts for potential thermal fluctuations by ensuring low-resistance contacts, thereby minimizing signal drift that would otherwise be corrected by cold junction compensation (CJC) or other software-level compensation methods within the DCS controller.
Q: Does the S9879UK support hot-swapping during active operation?
A: No. Disconnecting the connector unit while the I/O loop is energized may result in an open-circuit fault on the analog input channel. All loops must be set to manual or maintenance mode and power isolated before removal.
Q: Are there specific torque requirements for the field wiring terminals on this unit?
A: Yes. Although the unit utilizes metal spring contacts, ensure that the wire gauge inserted does not exceed the maximum capacity. Maintain a torque of 0.5 Nm for any screw-type terminals associated with the interconnection to ensure stable contact resistance of <= 5 mOhm.
