Yokogawa AFV30D-S41252 Duplexed Field Control Unit

Description

Key Technical Specifications

Yokogawa’s documentation gives 220–240 V AC, 50/60 Hz and 230 VA for the AFV30D-S41252 power configuration. It also specifies 19-inch rack mounting and approximately 8.0 kg for the AFV30D.

A field-control-unit configuration with dual-redundant Vnet/IP and power is explicitly associated with the 4 suffix. The standard -S configuration is for CP461, while the final 2 corresponds to R6.01 or later.

Product Introduction

The Yokogawa AFV30D-S41252 is a duplexed Field Control Unit used in Yokogawa CENTUM VP systems for Vnet/IP and FIO applications. It is designed for 19-inch rack installation and uses CP461-compatible architecture. The specified configuration provides dual-redundant Vnet/IP and dual-redundant power, with a 220–240 V AC supply.

This model should be treated as a system-level FCU rather than a conventional plug-in I/O module. Replacement requires attention to the CP461 configuration, Vnet/IP redundancy, FIO architecture, power arrangement, and CENTUM VP revision. The exact suffix should be matched rather than substituting another AFV30D variant based only on the base model number.

AFV30D-S41252

AFV30D-S41252

Installation & Configuration Guide

Stage 1 — Pre-Installation Preparation (~10 min)

1. Confirm the complete nameplate: AFV30D-S41252.
2. Verify that the existing FCU uses CP461 and the expected CENTUM VP configuration.
3. Confirm the plant uses the dual-redundant Vnet/IP configuration.
4. Record the two network connections and their physical assignments.
5. Document the FIO/ESB-related connections associated with the FCU.
6. Verify that the cabinet supply is 220–240 V AC, 50/60 Hz.
7. Back up the applicable CENTUM VP configuration and engineering data.
8. ⚠️ Follow the site’s shutdown and lockout/tagout procedure before disconnecting the FCU.

Stage 2 — Removing the Old Module (~5 min)

1. Place the affected control domain in its approved maintenance state.
2. Confirm that the redundant control architecture has been placed in the appropriate maintenance condition.
3. Isolate the AC power according to the Yokogawa installation procedure and plant electrical rules.
4. Verify absence of hazardous voltage before opening the power connections.
5. Label both Vnet/IP connections and all FCU-associated cables.
6. Disconnect the power, grounding, network, and READY-contact wiring as applicable.
7. Remove the M5 × 8 rack-mount hardware.
8. Carefully withdraw the approximately 8 kg FCU from the 19-inch rack.

Stage 3 — Installing the New Module (~5 min)

1. ⚠️ Use ESD precautions when handling the replacement FCU and internal control hardware.
2. Confirm that the replacement is AFV30D-S41252, not AFV30D-S41251 or another suffix.
3. Install the unit into the same 19-inch rack position.
4. Secure the chassis using the specified rack hardware.
5. Reconnect protective grounding.
6. Reconnect the dual-redundant AC power connections.
7. Reconnect both Vnet/IP network paths according to the original topology.
8. Reconnect FIO/field-network connections.
9. Confirm the READY contact wiring before commissioning.

Stage 4 — Power-On & Testing (~10–15 min)

1. Restore power according to the approved CENTUM VP startup procedure.
2. Confirm that both redundant power paths are healthy.
3. Verify FCU initialization and processor status.
4. Check both Vnet/IP paths and confirm expected redundancy status.
5. Verify communication with the CP461 and associated FIO nodes.
6. Check the READY/fault indication.
7. Confirm that the CENTUM VP engineering and HIS/SCS environment reports the FCU normally.
8. ⚠️ Do not return the control domain to automatic operation until redundant communication and FIO availability have both been verified.

FAQ

What is the Yokogawa -S41252?

It is a duplexed Field Control Unit (FCU) for Yokogawa CENTUM VP systems. The platform supports Vnet/IP and FIO and is designed for 19-inch rack installation.

What does the S41252 suffix mean?

The suffix identifies the specific hardware configuration. Available Yokogawa-related documentation identifies -S as the standard type, 4 as dual-redundant Vnet/IP and dual-redundant power, 2 as the 220–240 V AC supply configuration, 5 as the basic non-explosion-protected type, and the final 2 as the R6.01-or-later configuration.

What powery does require?

This specific configuration uses 220–240 V AC, 50/60 Hz, with approximately 230 VA power consumption. The family also has other supply configurations, so the complete suffix must be checked before replacement.

Is explosion protected?

No. The 5 in this configuration corresponds to the basic type with no explosion protection. Yokogawa’s installation documentation separately identifies an explosion-protected configuration with a different suffix.

What is the difference between5?

Both are associated with the , 220 V, basic configuration. The published ordering information distinguishes S41251 as the R5-or-earlier configuration and as the R6.01-or-later configuration. Therefore, the revision requirement should be checked before substitution.

Ce with another ?

Not automatically. units can differ in power configuration, redundancy, explosion protection, processor compatibility, and revision. Match the complete suffix code and the CENTUM VP system revision before installing a substitute.

What should I verify before purchasing this FCU?

Verify the complete designation, compatibility, dual-redundant Vnet/IP requirement, 220–240 V AC power configuration, R6.01-or-later requirement, and non-explosion-protected status. For a critical DCS replacement, a photograph of the existing nameplate and rack configuration is also useful for confirming the exact hardware variant.