AMM32C Yokogawa RTD Input Multiplexer Module

Suffix Breakdown & Model Matrix

The available source material identifies AMM32C as a complete ordering model. No official suffix definition or model matrix is specified in the provided documentation; therefore, no suffix interpretation is included.

Hardware Specifications

Channel-to-Channel Isolation Considerations

RTD input multiplexer modules used within the CENTUM CS and CENTUM VP architecture are intended to maintain independent signal acquisition across multiple measurement channels. Proper separation of field wiring, shield termination, and grounding practices minimizes electrical coupling between adjacent RTD circuits and helps preserve measurement consistency. During installation, sensor wiring should follow the recommended cable routing practices for low-level analog signals to reduce induced noise from adjacent power conductors.

Frequently Asked Questions

Q: Does the AMM32C support hot replacement while the control system is energized?
A: The provided documentation does not specify hot-swap capability. Module replacement should follow the maintenance procedure defined for the installed CENTUM system.

Q: Can RTD signal cables be routed together with AC power cables?
A: It is recommended to route RTD signal wiring separately from power circuits. Where crossings are unavoidable, they should intersect at approximately 90 degrees to reduce electromagnetic interference.

Q: Is the insulation resistance specification measured with field wiring connected?
A: The specified insulation resistance of at least 100 Mohm at 500 VDC is a module specification. Verification during maintenance should follow the manufacturer’s prescribed testing procedure.

Field Installation Guidelines

• Verify that the installed module model matches the configured I/O assignment before insertion.
• Use the specified KS8 connecting cable for field termination.
• Tighten connectors completely to prevent intermittent contact caused by vibration.
• Connect cable shields according to the system grounding practice and avoid multiple shield ground points.
• Keep RTD wiring separated from motor, inverter, and high-current power cables.
• Confirm terminal identification before connecting field sensors to avoid channel misassignment.
• After installation, perform channel verification from the engineering workstation before placing the module into normal operation.