ADM11C Yokogawa Contact Input Module

Hardware Specifications

Yokogawa DCS Contact Signal Processing

The ADM11C accepts discrete field signals through 16 input channels. For contact inputs, the module identifies an ON state at 200 Ohm or less and an OFF state at 100 kOhm or more. It also accepts voltage inputs from 4.5 to 25 VDC for the specified OFF condition and +/- 1 VDC for the specified ON condition.

Each input point provides galvanic isolation. Therefore, the module separates the electrical input paths between individual channels while transferring the detected contact status to the control system.

The module specifies a minimum pulse width of 40 ms and a pulse period of 10 Hz or less. These limits define the input signal timing that the module can process according to the supplied specifications.

Frequently Asked Questions

Q: How many contact input channels does the Yokogawa ADM11C provide?
A: The ADM11C provides 16 digital contact input channels.

Q: What power does the ADM11C draw from the control system nest?
A: The module consumes 600 mA or less from the 5.0 VDC supply provided by the control system nest.

Q: Does the ADM11C provide isolation between input channels?
A: Yes. The supplied specifications state that the module provides galvanic isolation for each individual input point.

Field Installation Guidelines

Install the Yokogawa ADM11C in its designated I/O module nest or rack and secure the module according to the applicable system hardware procedure.

Connect field contact or voltage signals to the assigned input channels. Verify signal polarity and terminal assignments before applying power.

Keep discrete signal wiring separated from high-voltage power conductors and high-current switching circuits where the installation allows. Use appropriate cable shielding and grounding practices when the surrounding installation requires additional noise control.

Before commissioning, verify each field input in both its ON and OFF states. Check that the measured field signal remains within the specified electrical thresholds and that pulse signals meet the stated timing requirements.

Confirm the module’s 5.0 VDC supply and current load against the control system nest capacity before installation.