AMM31T-S2 Yokogawa RTD Input Module

Yokogawa AMM31T-S2 Centum CS RIO RTD Input Multiplexer Module

Yokogawa AMM31T-S2 Centum CS RIO RTD Input Multiplexer Module

Availability: 10 left in stock

Yokogawa AMM31T-S2 Centum VP RTD Input Multiplexer Module The Yokogawa AMM31T-S2, also cataloged as the AMM31T RTD Input Multiplexer Module,...

SKU: AMM31T

Manufacturer: Yokogawa
Product No.: AMM31T
Product Type: RTD Input Multiplexer Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 800g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM31T-S2 Centum VP RTD Input Multiplexer Module

The Yokogawa AMM31T-S2, also cataloged as the AMM31T RTD Input Multiplexer Module, operates as a dedicated hardware component for multi-channel temperature signal acquisition within Centum CS / Centum VP platforms. Configured as part of the RIO system architecture, the device routes multiple analog resistive circuits through a centralized analog-to-digital processing core, scanning field transmitters sequentially to populate the station variables.

Layout Configuration Selection: Layout 1

Hardware Specifications

Parameter	Specification
Model	AMM31T-S2
Brand	Yokogawa Electric Corporation
Origin	Japan
Weight	0.8 kg (1.72 lbs)
Dimensions	12.7 cm x 10.2 cm x 22.9 cm (5.0 in x 4.0 in x 9.0 in)
Operating Temp	-20 to +70 deg C
Power Consumption	24 VDC, 150 mA typical current draw
Input Channel Count	8 channels (multiplexed scanning arrangement)
Supported RTD Wiring	2-wire, 3-wire, 4-wire configurations (e.g., Pt100)
Temperature Measurement Limits	-200 to +850 deg C
Base Accuracy	+/- 0.1% of full scale
Internal Sampling Rate	1 sample per second
Serial Interface	RS-485 communication protocol
Housing Installation	DIN-rail mounting base compatibility
System Diagnostics	Internal self-test routines and loop alarm verification

Process Control & DCS Instrumentation Technical Attributes

This execution unit utilizes a solid-state multiplexing matrix to switch 8 RTD input channels into a single high-resolution sampling network. The physical layout incorporates internal loop connections that balance resistive values for 3-wire and 4-wire Pt100 sensors, eliminating lead-wire resistance variables before digitization. To maintain structural data security across the industrial serial backbone, the design utilizes an isolated RS-485 interface link that prevents field-side voltage spikes from bleeding into the primary DCS processing logic, while integrated channel-to-channel isolation circuits suppress common-mode electrical interference.

Frequently Asked Questions

Q: How does the sequential scanning architecture affect the time constant of the control loops?

A: The module executes an active sampling cycle of 1 sample per second across the input array. Because channels undergo multiplexed processing, this hardware configuration must be restricted to slow-velocity thermal processes where immediate update changes under 100 ms are not demanded by the controller.

Q: What mechanisms exist to identify sensor faults or wire breaks?

A: The module integrates continuous diagnostic hardware monitoring routines. An open-circuit or broken lead wire on any connected RTD channel triggers a high-scale upscale burnout alarm bit within the internal diagnostic status word transmitted over the RS-485 link.

Field Installation Guidelines

DIN-Rail Panel Fitting: Snap the terminal enclosure firmly onto standard symmetric 35 mm DIN-rail systems, confirming the 12.7 cm x 10.2 cm x 22.9 cm clearance profiles match cabinet spacing.
Resistive Loop Termination: Terminate the 2-wire, 3-wire, or 4-wire field lines onto the designated terminal pin positions, preserving matched conductor lengths for identical resistance legs.
Shield Continuity Management: Ground all external RTD instrumentation cable shields exclusively at the central marshalling enclosure earth bar, keeping the sensor side isolated to prevent parasitic circulating currents.
Bus Serial Wiring: Daisy-chain the RS-485 serial communication pairs using twisted, shielded instrumentation cables, installing proper termination resistors at the physical end-of-line nodes.

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