Yokogawa ARM15A-000 S1 Mechanical Relay Contact Input Board

Configured for 32-channel mechanical relay contact input interfacing in Yokogawa CENTUM VP and FIO platforms, the Yokogawa ARM15A-000 S1 (ARM15A-000 mechanical relay contact input board) provides direct electrical interfacing between external contacts and compatible digital input modules.

Hardware Specifications

Channel Isolation and Contact Interface

The ARM15A-000 provides a mechanical contact interface for digital input circuits. Each channel accepts an external contact condition and presents the corresponding electrical state to the connected digital input architecture.

The specified ON condition is 150 ohm or less, while the OFF condition is 200 kohm or greater. The field interface uses M4 screw terminals. Therefore, field wiring should maintain secure mechanical termination and separation from circuits carrying unrelated signals.

The board uses 24 VDC external power for its internal circuit supply. Field device power is arranged as two lines, with each line serving 16 points and supporting up to 0.3 A.

Frequently Asked Questions

Q: What digital input modules can connect to the ARM15A-000?
A: The supplied data identifies ADV151 and ADV161 as compatible digital input modules.

Q: What contact resistance represents the ON state?
A: The specified ON condition is 150 ohm or less. The specified OFF condition is 200 kohm or greater.

Q: Does the board use an internal power source?
A: No. The supplied specifications identify a 24 VDC external power supply for the internal circuit, with a maximum current of 0.32 A.

Field Installation Guidelines

Install the ARM15A-000 in the specified 19-inch rack position and maintain the stated 3U mechanical envelope. Secure the module before terminating field wiring.

Connect external contact circuits to the M4 field terminals according to the approved system wiring diagram. Verify conductor identification before energizing the 24 VDC supply.

Route contact wiring separately from high-current power conductors and sources of significant electrical interference. Where shielded cables are specified by the system design, terminate the shield according to the Yokogawa installation standard rather than creating unintended ground loops.

Check the contact resistance against the specified ON and OFF thresholds during commissioning. Verify the 24 VDC supply polarity, field wiring continuity, and terminal tightness before applying operating power.

Do not modify the specified cable type or I/O module connection without confirming compatibility with the installed CENTUM VP or FIO configuration.