Product Details
The Yokogawa CM1*A, also cataloged as the CM1 Communication Module, operates as a dedicated hardware component for high-speed protocol execution and data routing within CENTUM VP and CENTUM CS 3000 platforms. It manages bi-directional telemetry transmission, buffer queue processing, and system-level failover tasks across plant network buses.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CM1*A (CM1 Suffix A) |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.45 kg |
| Dimensions | 120 mm x 80 mm x 35 mm |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 24 VDC typical system supply |
| Storage Temp | -20 to 70 deg C |
| Communication Protocols | OPC, Modbus RTU/TCP, EtherNet/IP |
| Redundancy Support | Hot-standby failover support |
| Primary Functions | Data routing, buffering, procedure execution |
| System Compatibility | CENTUM VP, CENTUM CS 3000 |
4-20 mA HART Loop Protocol and Channel Isolation
The CM1*A module acts as a communications hub routing real-time process data between field instrumentation networks and control station processors. Interfacing with downstream field I/O subsystems carrying 4-20 mA HART loop protocol parameters, the unit converts field telemetry packets into OPC, Modbus RTU/TCP, and EtherNet/IP frames. High-density backplane channel-to-channel isolation prevents electrical noise and common-mode voltage spikes on communication lines from disrupting internal microprocessors or cross-contaminating connected subsystem networks during deterministic data transport.
Frequently Asked Questions
Q: How does the CM1*A module execute failover during hardware or line faults?
A: The board supports hot-standby failover architecture, enabling dual-redundant tracking and immediate control path transfer without losing data buffers or resetting active network sessions.
Q: What power input voltage is required to energize the CM1*A communication module?
A: The module relies on a nominal 24 VDC industrial power distribution input provided through the system rack backplane assembly.
Q: Can the CM1*A simultaneously handle serial Modbus and Ethernet-based communication protocols?
A: Yes, the onboard processor executes firmware routines for Modbus RTU, Modbus TCP, EtherNet/IP, and OPC protocol handling concurrently across its physical interfaces.
Field Installation Guidelines
- Anti-Static Precautions: Always wear a grounded anti-static wrist strap before handling the circuit assembly or inserting the module into the sub-rack.
- Mechanical Mounting: Align the module card edges with the enclosure slot guides and push firmly until the rear connector seats into the backplane; lock the faceplate retention screws.
- Cable Shielding: Connect overall communication cable shields to a dedicated instrument single-point earth ground bar to suppress electromagnetic interference.
- Signal Separation: Maintain physical segregation between serial/Ethernet bus lines and high-voltage AC power cabling inside the control cabinet wire trunks.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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