Yokogawa SB401-50 ESB Bus Interface Slave Module

Description

The SB401-50 is the ESB Bus Slave Interface Module for Yokogawa CENTUM-VP FIO Node Units (ANB10S/ANB10D/ANB11S/ANB11D). It mounts on the A2BE2D Base Plate alongside PW481/PW482/PW484 PSU modules and FIO I/O modules, and connects via an A2EE1A ESB Bus Adapter + YCB301 dedicated cable (max. 10 m) to the FCU-side ESB Bus Coupler (EC401 or EC402) in AFV30/AFV40 Field Control Units. Dual-redundant node configurations use two SB401 modules per node. The ESB bus runs at 128 Mbps, bus topology, redundancy available, max 13 ESB + Optical ESB Node Units per FCU.

Features

• ESB Bus Slave Interface for CENTUM-VP FIO architecture
• Mounts on A2BE2D Base Plate (Node Unit for FIO)
• Compatible Node Units: ANB10S, ANB10D, ANB11S, ANB11D
• Dual-redundant configuration support (2 modules per node)
• ESB transmission speed: 128 Mbps
• Paired with FCU-side EC401 (max. 9 nodes) or EC402 (max. 9 upper + 9 lower)

Applications

• CENTUM-VP FCS remote I/O node construction via ESB bus
• FIO I/O aggregation (analog, digital, comm, turbomachinery) under ANB10/ANB11
• Redundant ESB architectures with AFV30/AFV40 FCU
• Cabinet I/O expansion for existing CENTUM-VP FIO installs

Ordering Information

Per your suffix breakdown:

→ SB401-50 = SB401 + Suffix1=-5 (Basic) + Suffix2=0 (Standard, no explosion protection)

Supporting build items for a complete FIO Node Unit (GS 33J60A10-01EN):

Technical Specifications

SB401 carries Factor = 0 (single & dual) in the node-unit PSU loading table (GS 33J60A10-01EN p14-15 "Others"), so it does not consume PSU budget — only the I/O modules do.

Connections / Interfaces

Installation Guidelines

CRITICAL WARNING — De-energize PW48x PSU and verify lockout before handling SB401 on A2BE2D. The base plate backplane is live from the PSU module.

1. PSU first — Install PW481/PW482/PW484 into A2BE2D's PSU slot; this powers the entire node backplane.
2. SB401 slot — Insert SB401 onto A2BE2D guide rails, latch front. Dual nodes (ANB10D/ANB11D): populate two SB401 in the bus-interface positions.
3. A2EE1A — Fit A2EE1A ESB Bus Adapter on SB401 front connector.
4. Cabling to FCU — YCB301 from A2EE1A → FCU EC401 (1×, max 9 nodes) or EC402 (upper+lower, 9 each side). Total ≤13 ESB+Optical ESB nodes/FCU.
5. Empty slots — Cover unused A2BE2D slots with ADCV01 (I/O/Bus IF) or ADCV02 (PSU).
6. High-temp option (-20 to 70 degC) on node — max 4 I/O modules/node; ≥1 empty slot between SB401/ANTx and I/O; ≥1 between I/O↔I/O; ≥2 between duplexed I/O pairs.
7. Grounding — Per local regs (GS 33J60A10-01EN p2). Single-point scheme consistent with FCU cabinet.