CM1A Yokogawa Series Datasheet & Technical Manual

Signal Conditioner and Communication Hub Yokogawa CM1*A

Signal Conditioner and Communication Hub Yokogawa CM1*A

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Yokogawa CM1*A Communication Module Configured for signal conditioning and communication data exchange within CENTUM system architectures, the Yokogawa CM1*A (CM1*A...

SKU: CM1*A

Manufacturer: Yokogawa
Product No.: CM1*A
Product Type: Signal Conditioner Modules
Product Origin: Japan
Payment:T/T, Western Union
Weight: 600g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa CM1*A Communication Module

Configured for signal conditioning and communication data exchange within CENTUM system architectures, the Yokogawa CM1*A (CM1*A Signal Conditioner / Communication Module) provides direct physical execution of signal conversion and protocol routing.

Hardware Specifications

Parameter	Specification
Model	CM1*A
Brand	Yokogawa
Origin	Japan
Weight	0.6 kg
Dimensions	Standard signal conditioner nest form factor
Operating Temp	-10 to 55 deg C
Power Consumption	24 VDC
Communication	OPC, Modbus, Ethernet
Function	Signal conversion and data buffering

Process Control and Channel-to-Channel Isolation

The CM1*A module architecture serves as an interface hub, managing the translation of legacy field signals into protocols compatible with modern DCS networks such as CENTUM CS 3000 and CENTUM VP. The module implements stringent channel-to-channel isolation and galvanic power isolation to protect the communication backplane from field-originated transients. This isolation profile ensures that electromagnetic interference (EMI) originating from external analog or digital loop wiring remains confined, thereby preserving the integrity of the internal bus data packets during high-frequency polling.

Frequently Asked Questions

Q: Is the CM1*A module capable of hot-swapping within the signal conditioner nest?

A: No, hot-swapping is not supported. The module and its corresponding nest must be de-energized before extraction or insertion to prevent voltage spikes from damaging the internal communication buffers and backplane interface pins.

Q: How are communication protocol parameters managed for the Modbus or OPC interfaces?

A: Protocol-specific parameters are mapped via the DCS engineering station software. The module acts as a passive router for these signals; however, physical link layer integrity requires strict adherence to twisted-pair shielding and grounding practices at the cabinet interface.

Field Installation Guidelines

Mounting: Seat the CM1*A module firmly into the designated signal conditioner nest. Ensure the rear-facing connector contacts are fully engaged with the backplane to provide a low-impedance path for signal and power signals.
Grounding: Terminate the cable shields at the cabinet-level grounding rail rather than the module terminal block to maintain the isolation barrier. Connect the module chassis to the system PE bus to provide a discharge path for common-mode currents.
Cable Management: Use shielded cabling for all Ethernet and RS-485 serial links. Maintain a minimum separation of 150 mm from high-current AC power wiring to minimize inductive noise coupling into the communication lines.
Environment: Verify that the cabinet temperature remains within the -10 to 55 deg C range. While the module is built for demanding environments, ensure that forced-air ventilation is present if the module nest is densely populated.

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