Configured for signal termination within the N-IO system platform, the YOKOGAWA A2SMX801-S000 (A2SMX801-S000 Terminal Board) provides direct physical execution of I/O signal distribution. The board serves as the primary interface to connect field instruments and sensors to the control system, facilitating data acquisition across N-IO modules without intermediate active signal conditioning.

Suffix Breakdown & Model Matrix

• A2SMX801: Base model designation for the N-IO signal terminal board.
• -S: Standard hardware configuration for general-purpose signal termination.
• 000: Base revision level for standard I/O mapping and connector layout.

Hardware Specifications

Channel-to-Channel Isolation and Field Connectivity

The A2SMX801-S000 functions as a non-isolated signal termination interface. It is engineered to maintain a low-impedance connection path between field transmitters and the N-IO backplane. Since this board lacks active galvanic isolation, it is designed for deployment in configurations where field loops are either inherently self-isolated or where grounding requirements are managed by external loop-level protection components. The board ensures consistent continuity for 4-20 mA HART loop protocol signals by minimizing insertion loss across the terminal points.

Frequently Asked Questions

Q: Does this terminal board require an external power supply for signal pass-through?

A: No. The A2SMX801-S000 is a passive termination component and does not require an auxiliary power supply to facilitate signal flow.

Q: Is this board compatible with both current and voltage input types?

A: Yes. The board serves as a physical interface for field wiring; however, the actual signal type conversion is determined by the specific N-IO module plugged into the associated baseplate.

Field Installation Guidelines

1. Ensure the N-IO node is fully de-energized before mounting the board to prevent accidental shorts during terminal wiring.
2. Align the board precisely with the baseplate connectors; ensure the mechanical fasteners are fully engaged to provide a stable electrical contact.
3. Tighten all screw terminals to the torque specifications provided in the maintenance manual to prevent resistive heating and signal degradation.
4. Separate field signal wiring from high-voltage AC cables within the cabinet to reduce induced electromagnetic noise in the non-isolated circuitry.
5. Verify that the cable shield drain wires are connected to the cabinet's instrument ground bus at the entry point to maintain signal integrity.