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Yokogawa AAB841-S50/M4A008 Input / 8-Output Analog I/O Module Item NO.: 2932301

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Product Name	Yokogawa AAB841-S50/M4A008 Input / 8-Output Analog I/O Module
Item NO.	2932301
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	YOKOGAWA
Brand	YOKOGAWA
Creation Time	2026-11-13

YokogawaFIO ANALOG I/O

Yokogawa AAB841-S50/M4A008-Input / 8-Output Analog I/O Module

Product Introduction

Yokogawa AAB841-S50/M4A00 combines eight 1 to 5 V analog inputs and eight 4 to 20 mA analog outputs in one non-isolated field I/O module. The paired input and output groups support applications that need measurement and current actuation within the same module footprint.

In AAB841-S50/M4A00, S identifies the standard type, 5 identifies the non-explosion-protected construction and 0 identifies the basic environmental specification. The analog data update period is 10 ms, while the input and output groups share the module reference rather than providing channel-by-channel isolation.

The /M4A00 option on AAB841-S50/M4A00 specifies the ATM4A-00 MAC2-compatible interface adapter. The adapter separates the eight voltage-input positions from the eight current-output positions and connects both groups to the FIO module through the cabinet-side MAC2 arrangement.

Yokogawa AAB841-S50/M4A00 field I/O module external dimensions from the official manual

Specification Details

Specification	AAB841-S50/M4A00
Brand	Yokogawa
Product Name	8-Input / 8-Output Analog I/O Module
Country	Not specified
Platform	CENTUM VP Field I/O
Input channels	8
Input signal	1 to 5 V DC
Output channels	8
Output signal	4 to 20 mA DC
Isolation	Non-isolated analog I/O
Data update period	10 ms
Environmental class	Basic
Explosion protection	Not included
Interface option	ATM4A-00 MAC2-compatible adapter
Redundant use	Supported with the required identical arrangement
Approximate weight	0.3 kg

Product Functions

AAB841-S50/M4A00 places two analog functions behind one module identity, with eight voltage measurements and eight current commands handled as distinct channel groups.

Voltage input group

The input side receives eight 1 to 5 V signals and transfers the converted values to the field control station on the documented update cycle.

Current output group

The output side supplies eight 4 to 20 mA commands to compatible loads. Output loop power and load resistance remain part of the external circuit design.

Shared module reference

Because the channels are non-isolated, the field wiring and reference arrangement must follow the official connection design rather than assuming independent floating loops.

Communication and Connectivity

Connectivity for AAB841-S50/M4A00 is defined by the MAC2-compatible adapter, the channel grouping and the node position recorded in the control system.

ATM4A-00 interface

The /M4A00 suffix connects the module to the ATM4A-00 adapter, which carries the MAC2-compatible cabinet wiring into the FIO signal interface.

Input-output separation

Keep the eight input cores and eight output cores clearly identified at the adapter so a current output cannot be mistaken for a voltage input during cabinet work.

Node data exchange

The module exchanges analog values with the field control station through the FIO node; network communication is handled by the node rather than by a standalone Ethernet port on the module.

Product Questions

Q01Why can an AAB841-S50/M4A00 output command be correct in software but wrong at the field device?

For AAB841-S50/M4A00, trace the output channel through the ATM4A-00 adapter, loop supply and load return. The application value can be correct even when the external current loop is open or landed on the wrong adapter point.

Q02What must be checked before using AAB841-S50/M4A00 in a redundant pair?

For AAB841-S50/M4A00, verify that both modules have the same suffix and interface arrangement, occupy the required adjacent positions and use the supported node configuration.

Q03What causes all AAB841-S50/M4A00 input values to shift together?

Because AAB841-S50/M4A00 is non-isolated, first check the shared reference, adapter connection and field common before recalibrating individual transmitters. A common reference fault can move several channels in the same direction.

Q04How can an ATM4A-00 wiring mismatch be found before AAB841-S50/M4A00 is energized?

For AAB841-S50/M4A00, compare the ATM4A-00 terminal numbers with separate input and output channel lists; continuity testing should confirm that no 4 to 20 mA output core is landed on a 1 to 5 V input position.

Q05How should mixed input and output loop records be prepared for AAB841-S50/M4A00?

Create separate channel lists for the eight 1 to 5 V inputs and eight 4 to 20 mA outputs of AAB841-S50/M4A00, then tie both lists to the same module and ATM4A-00 adapter record.

Q06Can AAB841-S50/M4A00 replace an isolated analog I/O module with the same channel count?

AAB841-S50/M4A00 should not replace an isolated design solely because both have eight inputs and eight outputs. Review signal types, common reference, terminal adapter, redundancy and cabinet wiring.

Advantageous Brands

Moore Automation

https://www.mvme.cn/

Moore Automation works with a broad industrial product range spanning Yokogawa CENTUM and ProSafe-RS, ABB control systems, Siemens SIMATIC and SINAMICS, Rockwell Automation, GE, Honeywell and Bently Nevada.

The brand range covers distributed control, PLC hardware, field I/O, drives, safety-system components and machinery monitoring products, with each manufacturer and model kept as a separate quotation line.

Yokogawa control systemsPLC and DCS familiesDrive and motion productsMachinery monitoring

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