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Description
Yokogawa ADM11T Contact Input Module
The Yokogawa ADM11T, also cataloged as the ADM11 Contact Input Module, operates as a dedicated hardware component for digitizing discrete switch status signals within CENTUM DCS platforms. It directly interfaces field devices to the control system, providing channel-level electrical isolation and status feedback.
Hardware Specifications
Parameter
Specification
Model Brand
Yokogawa
Origin
Japan
Input Points
16 independent channels
Input Type
Dry contact / wet contact (voltage dependent on common)
Input Voltage Range
On ≥ 19 VDC, Off ≤ 5 VDC
Input Current
~7 mA per point at nominal voltage
Response Time
Sub-millisecond switching detection
Channel Isolation
500 V AC typical (channel-to-channel or group)
Wiring Interface
Screw terminal block
Channel Density
16 points per module slot
Mounting
DIN rail or backplane for Yokogawa controllers
Operating Temperature
-20 to +60 degC
Power Consumption
< 100 mA from internal logic supply
Weight
~200 g including terminals
Dimensions
Standard slim-profile module for dense cabinet layout
Status Indication
LED per channel
DCS Connectivity & Electrical Characteristics
The ADM11T provides channel-to-channel isolation and integrates directly into the Yokogawa CENTUM backplane. Input circuits accept both normally open and normally closed contacts, providing deterministic logic detection within sub-millisecond response times. LED indicators per channel deliver real-time visual feedback of input status, simplifying local diagnostics without external instrumentation.
Frequently Asked Questions
Q: Can the ADM11T module be replaced while the system is powered? A: Hot-swap replacement is supported; standard precautions for DIN rail modules must be observed.
Q: What is the maximum input current per channel? A: Approximately 7 mA per channel at nominal voltage.
Q: How is electrical isolation handled? A: Each input channel is optically isolated with a typical rating of 500 V AC from internal logic circuits.
Field Installation Guidelines
Mount module securely on the DIN rail, ensuring proper alignment with adjacent modules.
Connect field wiring to screw terminals, verifying correct polarity for wet contacts.
Avoid running input wires in parallel with high-voltage or high-current cables to reduce electromagnetic interference.
Ensure the backplane connector is fully seated before applying power.
Ground the module chassis according to site standards to maintain isolation integrity.
LED indicators can be used for immediate verification of input signal continuity and logic state.
