Yokogawa ADM51T Digital Contact Output Module

Hardware Specifications

Process Control Signal Characteristics

The ADM51T switches field-side loads through transistor contact outputs. Each output supports a rated voltage of 24 VDC and a rated current of 100 mA. The module can generate pulse-width outputs from 0.1 to 7200 seconds with 20 ms resolution.

In addition, the module supports time-proportioning output. This function varies the output state over defined time intervals according to the configured control operation. Channel isolation separates the output channels electrically and limits signal interaction between channels.

Frequently Asked Questions

Q: What output signal does the ADM51T provide?
A: The ADM51T provides transistor contact outputs using an open-collector style switching arrangement.

Q: What electrical load can each output point handle?
A: Each output point is rated for 24 VDC and 100 mA.

Q: What pulse duration can the module generate?
A: The specified pulse-width range is 0.1 to 7200 seconds, with 20 ms resolution.

Field Installation Guidelines

• Install the module in the designated Yokogawa hardware assembly and secure the terminal connection before energizing the circuit.
• Use the specified ADT16 terminal block or M4 screw-terminal interface for field wiring.
• Verify the connected load voltage and current against the 24 VDC and 100 mA-per-point ratings.
• Route output wiring separately from high-voltage power conductors where practical to reduce electrical interference.
• Maintain correct polarity and common-return wiring for transistor output circuits.
• Connect cable shields according to the applicable Yokogawa system grounding practice. Avoid creating unintended ground loops.
• Verify each output channel with the connected field device before placing the control loop into service.
• Use compatible KS2, KS3, KS9, or KS10 system cables where the installed system requires these cable types.