ALR111-S00 YOKOGAWA CENTUM Datasheet & Technical Manual

Yokogawa AMM12C CENTUM VP Analog Input Multiplexer Module

Yokogawa AMM12C CENTUM VP Analog Input Multiplexer Module

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Yokogawa AMM12C Analog Input Multiplexer Module The Yokogawa AMM12C, also cataloged as the AMM12C Analog Input Multiplexer Module, operates as...

SKU: AMM12C

Manufacturer: Yokogawa
Product No.: AMM12C
Product Type: Analog Input Modules
Product Origin: Japan
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM12C Analog Input Multiplexer Module

The Yokogawa AMM12C, also cataloged as the AMM12C Analog Input Multiplexer Module, operates as a dedicated hardware component for high-density signal acquisition within CENTUM VP/CS process control systems.

Hardware Specifications

Parameter	Specification
Model	AMM12C
Brand	Yokogawa
Origin	Japan
Weight	0.3 kg
Dimensions	32.8 x 130 x 107.5 mm
Operating Temp	-10 deg C to +55 deg C
Power Consumption	400 mA (5 VDC)
Channel Count	16 multiplexed channels
Signal Input	4-20 mA DC
Input Resistance	250 Ohm
Resolution	12 bits
Accuracy	+/- 0.1% FS

DCS Process Control & Connectivity

The AMM12C utilizes a multiplexed architecture to interface multiple field transmitter signals into the Yokogawa control environment. Each channel supports standard 4-20 mA DC current loops, with integrated burnout detection logic to identify open-loop or short-circuit fault states. System-to-bus isolation is maintained to protect the backplane from field-side transients, ensuring signal integrity during the multi-second multiplexed cycle. The module facilitates efficient I/O density within the I/O nest, supporting high-density configurations necessary for large-scale process automation.

Frequently Asked Questions (FAQ)

Q: What is the primary function of the multiplexing cycle in the AMM12C?

A: The module cycles through the 16 input channels to sample field data sequentially. This allows the system to monitor a high number of inputs using a consolidated processing path, resulting in a total data update period of approximately 1 second.

Q: How does the AMM12C handle sensor burnout detection?

A: The module monitors the current loop status; if the input signal falls outside the predefined operating range (indicating a loop failure), the module triggers a burnout detection flag which is configurable to either upscale or downscale for alarm processing.

Field Installation Guidelines

Mounting: Secure the AMM12C module into the designated slot within the Yokogawa I/O cabinet nest. Ensure the backplane connectors are fully seated to prevent intermittent bus communication.
Wiring: Use shielded twisted-pair cabling for all 4-20 mA inputs to mitigate electromagnetic interference. Connect cable shields to the cabinet ground bar, ensuring the shield is grounded at one end only to prevent ground loops.
Environmental Considerations: Maintain ambient temperatures within the specified -10 deg C to +55 deg C range. Ensure adequate air circulation within the cabinet to prevent thermal accumulation, as high-density modules generate localized heat during continuous operation.
Maintenance: Do not attempt to modify the module firmware or internal jumpers while the system is powered. Verify that all field connections are torqued to manufacturer specifications to ensure long-term mechanical stability.

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