AMM12 Yokogawa CENTUM VP Datasheet & Technical Manual

AMM12 Yokogawa CENTUM VP Analog Input Multiplexer Module

AMM12 Yokogawa CENTUM VP Analog Input Multiplexer Module

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Yokogawa AMM12 CENTUM VP FIO System The Yokogawa AMM12, also cataloged as the AMM12 Analog Input Multiplexer Module, operates as...

SKU: AMM12

Manufacturer: Yokogawa
Product No.: AMM12
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 140g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM12 CENTUM VP FIO System

The Yokogawa AMM12, also cataloged as the AMM12 Analog Input Multiplexer Module, operates as a dedicated hardware component for precision analog signal acquisition within CENTUM VP and CS 3000 Distributed Control Systems platforms.

Hardware Specifications

Parameter	Specification
Model	AMM12
Brand	Yokogawa
Origin	Japan
Weight	0.14 kg
Dimensions	2.5 cm x 22.9 cm x 7.6 cm
Operating Temp	0 to +60 deg C
Power Consumption	Typical 250 mA at 5 V DC
Number of Channels	16 Isolated Analog Inputs
Signal Support	4-20 mA DC / 1-5 V DC
Input Resistance	250 Ω (for current signals)
Conversion Accuracy	+-0.1% of full scale
Isolation Protection	Galvanic isolation between field side and system backplane
Withstanding Voltage	1500 V AC between field and system (for 1 minute)

4-20 mA HART Loop Protocol and Channel-to-Channel Isolation

The AMM12 manages 16 isolated analog input channels utilizing a multiplexing architecture designed to protect signal integrity from field-side interference. The internal hardware enforces galvanic isolation rated at 1500 V AC between the field wiring terminals and the system backplane logic. The low-impedance 250 Ω input resistors for 4-20 mA current loops facilitate direct electrical execution of signal digitization without causing loop dropouts. This hardware layout preserves high-frequency components necessary for the 4-20 mA HART loop protocol when interfacing with external digital transmitters, while specialized filter circuits provide channel-to-channel isolation to mitigate common-mode noise during simultaneous multi-channel processing.

Frequently Asked Questions

Q: How does the AMM12 handle field wiring faults such as an open or short circuit? A: The module executes real-time diagnostics that continuously monitor loop electrical characteristics. If the signal drops below 4 mA (or crosses predefined voltage thresholds), the module generates open-circuit or short-circuit diagnostic flags which are synchronized immediately with the FIO bus scan cycles.

Q: Is the resolution of the AMM12 fixed, or does it vary based on engineering parameters? A: The internal analog-to-digital converter resolution ranges from 12-bit to 16-bit. This resolution is configuration-dependent and automatically bound by the engineering software settings defined within the host CENTUM VP platform.

Field Installation Guidelines

Module Insertion and Backplane Engagement: Align the AMM12 with the designated slot guides on the FIO node unit. Slide the module straight into the rack until the backplane connectors firmly seat. Tighten the module retaining screws to prevent intermittent connectivity.
Field Signal Wire Routing: Route the 4-20 mA and 1-5 V DC signal lines through dedicated instrument trays separate from high-voltage AC power cables. Maintain proper separation boundaries to eliminate electromagnetic coupling into the 16 analog channels.
Shield Grounding Practices: Connect the external cable shields to the dedicated system ground bar within the marshalling cabinet. Ensure that the shields are grounded at a single point only to prevent ground loop currents from degrading the module conversion accuracy.

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