AMM25C Yokogawa CENTUM VP Datasheet & Technical Manual

Yokogawa AMM25C CENTUM VP 32-Channel Analog Input FIO Card

Yokogawa AMM25C CENTUM VP 32-Channel Analog Input FIO Card

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Yokogawa AMM25C CENTUM VP Series Analog Input FIO Card Configured for high-density 4-20 mA analog signal acquisition in CENTUM VP...

SKU: AMM25C

Manufacturer: Yokogawa
Product No.: AMM25C
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM25C CENTUM VP Series Analog Input FIO Card

Configured for high-density 4-20 mA analog signal acquisition in CENTUM VP and CS 3000 systems, the Yokogawa AMM25C (AMM25C Analog Input FIO Card) provides direct physical/electrical execution. This hardware component interfaces up to 32 field-side loops with the core Vnet/IP control infrastructure via internal multiplexing circuits, processing standard current signals without requiring external isolation barriers or auxiliary conversion modules.

Hardware Specifications

Parameter	Specification
Model	AMM25C
Brand	Yokogawa Electric Corporation
Origin	Japan
Weight	0.5 kg
Dimensions	32.8 mm x 107.5 mm x 130 mm
Operating Temp	0 to 60 deg C
Power Consumption	System backplane dependent
Series Compatibility	CENTUM VP / CS 3000 FIO Subsystem
Number of Channels	32 Channels, isolated
Input Signal Range	4-20 mA DC
Input Resistance	250 ohms
Measurement Accuracy	plus/minus 0.1 percent of full scale
Isolation Architecture	Galvanic isolation between field-side and system-side logic
Diagnostic Capabilities	Integrated open-circuit and short-circuit detection

Process Control & DCS Instrumentation Features

The module integrates a dedicated 4-20 mA HART loop protocol layer enabling seamless pass-through communication between field instruments and the CENTUM VP engineering workstation. Internal measurement nodes feature individual channel-to-channel isolation parameters to mitigate ground loop currents and prevent common-mode voltage differentials from corrupting adjacent channels. For thermal safety and accuracy across varying installation conditions, electronic temperature sensors provide automated cold junction compensation (CJC) calculation routines when processing external thermocouple signals via matching terminal boards, ensuring deterministic A/D converter scaling.

Frequently Asked Questions

Q: Does the module support online hot-swap operations within an active FIO node?

A: Yes. The module is engineered with field-proven hot-swap logic allowing insertion and extraction under system power conditions. The backplane interface lines utilize staggered pin lengths to ensure ground connections establish first and break last, preventing transient electrical damage to system-side logic.

Q: What happens to the channel data when a field wire is severed or disconnected?

A: The module executes integrated open-circuit diagnostic logic. When the input current falls below the absolute physical threshold of 4 mA, the configuration flags register an underrange fault status bit, triggering system-side block alarms within the DCS interface.

Field Installation Guidelines

Mount the module vertically on the standard FIO node backplane unit, ensuring the top and bottom latch mechanisms click securely into place to maintain reliable backplane bus connection.
Maintain standard industrial field wiring separation by routing low-voltage 4-20 mA signal wires away from high-voltage AC distribution lines or heavy inductive load conduits to avoid electromotive interference.
Terminate signal cables using dedicated multi-point terminal blocks. Ensure all cable shields are tied to a single, clean instrumentation ground point at the cabinet entry barrier rather than grounding both ends.
Verify clear ventilation paths above and below the FIO node enclosure to ensure natural convective airflow maintains operating temperatures below 60 deg C.

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