YOKOGAWA ST5*A DCS Communication Module
The YOKOGAWA ST5*A, also cataloged as the ST5*A Communication Module, operates as a dedicated hardware component for high-speed field bus data exchange within CENTUM VP Field Control Unit (FCU) network backplanes.
Suffix Breakdown & Model Matrix
| Base Code | Option Code | Description |
|---|---|---|
| ST5 | *A | Standard Communication Interface Module Card |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST5*A |
| Brand | YOKOGAWA |
| Origin | Japan |
| Weight | 0.4 kg |
| Dimensions | Standard Single-Slot Module Dimensions |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 3 W |
| System Protocol | Vnet/IP Protocol |
| System Architecture | Field Control Unit (FCU) Interface |
Cold Junction Compensation & Channel Isolation Dynamics
The YOKOGAWA ST5*A module incorporates high-density galvanic isolation barriers designed to maintain signal integrity across noise-heavy industrial control environments. Channel-to-channel isolation limits ground loop currents from interfering with real-time process values, while internal cold junction compensation (CJC) circuits handle precise thermal referencing for critical analog field inputs routed through the Field Control Unit backplane.
Frequently Asked Questions
Q: What is the backplane current draw and thermal impact of installing the ST5A?
A: The ST5A draws a maximum power consumption of 3 W directly from the Field Control Unit backplane bus, maintaining minimal thermal loading inside sealed system cabinets.
Q: Can the ST5*A module be hot-swapped during active DCS control operations?
A: Yes, online replacement is supported provided that the host Field Control Unit is configured with a redundant bus architecture and online maintenance mode is active prior to physical extraction.
Field Installation Guidelines
Ensure that the main Field Control Unit rack power supply is properly grounded before inserting the module into its designated backplane slot. The ST5*A module must be firmly seated into the backplane connector guide rails and secured with its retaining screws to ensure stable electrical contacts and mitigate vibration-induced mechanical drift. All incoming network bus cables require shielded twisted-pair (STP) cabling with the shield layer terminated directly to the cabinet protective earth ground bar using low-impedance grounding clamps. Keep signal cabling strictly separated from high-voltage motor power conductors by at least 300 mm to prevent electromagnetic interference from degrading high-speed Vnet/IP communication reliability.
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| Warranty | 12 Months |
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