Yokogawa A2NN30D N-IO Node Interface Unit

Feature & Principle

It is the core interface node of Yokogawa CENTUM VP N-IO remote I/O system. It communicates with FCU via ESB optical bus, and exchanges data with N-IO I/O bases through F-SB bus. It can connect up to 6 sets of N-IO I/O units. It adopts dual redundant power and dual bus design to improve system availability. Besides data forwarding, it provides stable 24VDC power supply for the connected I/O modules. Built-in fault diagnosis, bus alarm and status indicator, supports hot maintenance for process control.

Specifications

Model: A2NN30D-440000000 Brand: Yokogawa Series: CENTUM VP N-IO Function: Node interface unit (NIU) Power input: 24VDC Redundancy: Dual redundant power supply, dual ESB communication Bus: Optical ESB uplink/downlink, F-SB bus to I/O base Max connected I/O unit: 6 units Mounting: DIN rail mounting Protection: No explosion-proof, standard industrial grade Application: Petrochemical, chemical plant, oil & gas DCS remote I/O cabinet Certification: CE, IEC

Components & Diagnostics

Main communication board, power conversion circuit, ESB optical interface, F-SB bus port, status LED, terminal block. Common faults: optical link loss, bus communication interruption, power channel failure, I/O power output abnormal.

Product Brief

A2NN30D-440000000 node interface unit, Yokogawa CENTUM VP DCS N-IO spare widely used for process remote I/O cabinet overhaul and replacement.