AAB841-S00 Yokogawa Analog I/O Module

Yokogawa AAB841-S00 CENTUM VP Analog Input Output Module

Yokogawa AAB841-S00 CENTUM VP Analog Input Output Module

Availability: 20 left in stock

Yokogawa AAB841-S00 Analog Input/Output Module Configured for simultaneous analog signal processing in CENTUM CS and CENTUM VP systems, the Yokogawa...

SKU: AAB841-S00

Manufacturer: Yokogawa
Product No.: AAB841-S00
Product Type: Analog Input/Output Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AAB841-S00 Analog Input/Output Module

Configured for simultaneous analog signal processing in CENTUM CS and CENTUM VP systems, the Yokogawa AAB841-S00 (AAB841 Analog Input/Output Module) provides direct physical/electrical execution. This non-isolated standard-type module handles 8 channels of 1 to 5 V analog input alongside 8 channels of 4 to 20 mA analog output. Operating within Yokogawa Field I/O subsystems, the unit converts field voltage variables for the DCS controller while simultaneously driving control valves and field actuators via current loops.

Suffix Breakdown & Model Matrix

Code / Suffix Segment	Configuration Detail	Functional Specification
Base Model: AAB841	Analog Input/Output Module	Combined 8-channel input (1-5 V) / 8-channel output (4-20 mA) unit
Suffix: -S	Standard Type	Non-isolated hardware configuration
Suffix: 0	Basic Option	Standard functionality revision
Suffix: 0	Always 0	Factory default code

Hardware Specifications

Parameter	Specification
Model	AAB841-S00
Brand	Yokogawa
Origin	Japan
Weight	0.2 kg
Dimensions	127 mm x 25 mm x 127 mm
Operating Temp	0 to +55 deg C
Power Consumption	Standard backplane power load
Input Channels	8 channels (1 to 5 V DC)
Output Channels	8 channels (4 to 20 mA DC)
Isolation Profile	Non-isolated (shared common reference across channels)
System Compatibility	Yokogawa CENTUM CS and CENTUM VP Field I/O systems
Storage Temperature	-20 to +70 deg C
Operating Humidity	10% to 90% RH (non-condensing)

4-20 mA HART Loop Protocol and Field Circuit Integrity

The AAB841-S00 executes simultaneous loop management by combining voltage-sensing inputs and current-driving outputs on a single card edge. On the output side, 4-20 mA signals control final control elements, maintaining analog fidelity for HART loop protocol passthrough to field positioners. Because this module features a non-isolated architectural design, field wiring loops share a common electrical reference; external loop isolators or signal conditioners must be installed upstream when interfacing with ungrounded field transmitters to eliminate common-mode ground voltage shifts across adjacent I/O channels.

Frequently Asked Questions

Q: Does the non-isolated architecture of the AAB841-S00 permit mixing different external power sources across field loops?

A: No, because all channels share a common internal signal ground, connecting external power supplies with varying earth potentials will cause ground loop currents and degrade analog conversion accuracy.

Q: Can the 4 to 20 mA output loops be powered directly from the internal backplane supply?

A: Output channels operate based on module-driven current loops, but field wiring impedance limits must be calculated to ensure total loop load resistance does not exceed the driver's voltage headroom.

Q: How should unused input channels be configured during commissioning to prevent signal floating?

A: Unused 1 to 5 V input channels must be shorted or tied to a stable reference voltage to prevent high-impedance floating inputs from injecting electrical noise onto adjacent active channels.

Field Installation Guidelines

When installing the Yokogawa AAB841-S00 module in control enclosures, follow these technical procedures:

De-energize the target rack node or ensure proper hot-swap safety clearance before inserting the module into its backplane slot.
Align the module card edges carefully with the slot guide rails and push firmly until the top and bottom mounting latches fully engage.
Route 1 to 5 V input wires and 4 to 20 mA output wires through separate field wiring ducts, keeping a minimum clearance of 300 mm from high-voltage AC lines.
Terminate cable shields at a single dedicated earth ground bar in the cabinet to prevent stray noise coupling into the non-isolated channel commons.
Verify that all field loops match the 1 to 5 V DC input or 4 to 20 mA DC output electrical ratings before applying signal power.

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