Name: Yokogawa AAI841-H50 Analog I/O Module
Brand: YOKOGAWA
SKU: 2932314
Price: 1 USD
Availability: InStock

Section 01

Product Description

Yokogawa AAI841-H50 is a non-isolated analog input/output module for CENTUM VP field I/O. It combines eight 4–20 mA input channels and eight 4–20 mA output channels in one module, placing field-current acquisition and controller-driven current output in the same FIO position.

On AAI841-H50, each input channel accepts either a two-wire transmitter loop or a four-wire current signal through its assigned pins. The module converts those currents for the control station while the output half converts controller values back into current loops; channel wiring therefore determines whether transmitter power and signal return share the module path.

AAI841-H50 adds HART digital communication to the analog current path. HART data is superimposed on the 4–20 mA loop, and Command 3 process variables can be handled without replacing the analog measurement; the H suffix identifies this communication function, while -50 specifies the basic, non-explosion-protected construction.

Section 02

Product Specifications

Specification	Specification details
Brand	Yokogawa
Model	AAI841-H50
Product type	Analog input/output module
Country	Not specified
Analog inputs	8 channels, 4–20 mA
Analog outputs	8 channels, 4–20 mA
Channel isolation	Non-isolated
Digital communication	HART
Input accuracy	±16 µA
Output accuracy	±48 µA
Data update period	10 ms
Output load	0–750 Ω; 200–750 Ω at 60–70 °C
Transmitter supply	At least 14.8 V at 20 mA
External connection	Pressure clamp, KS cable or MIL connector
Approximate weight	0.30 kg

Section 03

Current-Loop Signal Flow

AAI841-H50 divides its sixteen analog points between acquisition and actuation. The current path changes direction across the two channel groups, while HART communication remains coupled to the same field loops.

Eight input loops

AAI841-H50 receives eight 4–20 mA signals. Two-wire transmitters can use the module’s transmitter-supply path, while four-wire devices provide their own field power and return only the measured current.

Eight output loops

AAI841-H50 drives eight 4–20 mA output circuits. The connected load must stay within the specified resistance range so the commanded current can be established across the field loop.

Analog plus HART

AAI841-H50 carries HART digital information over the analog current. Command 3 variables travel through the HART channel while the continuous 4–20 mA value remains available to the controller.

Section 04

Wiring and Channel Limits

AAI841-H50 depends on the selected terminal interface and on loop conditions at each channel. These boundaries connect the module’s published accuracy and diagnostic behavior to actual field wiring.

Terminal choices

AAI841-H50 can connect through a pressure-clamp terminal block, a KS cable interface or a MIL-style connector arrangement. The selected interface must preserve the input/output pin assignment.

Open-output detection

AAI841-H50 detects an open output circuit when the output current falls below 0.65 mA. This indication concerns the output loop and is separate from an input-channel reading.

Load and temperature

AAI841-H50 permits a 0–750 Ω output load through most of its range; at 60–70 °C the lower bound becomes 200 Ω. The load check therefore belongs to the output loop and ambient condition together.

Section 05

Common Questions

How should two-wire and four-wire transmitters be distinguished on AAI841-H50?

For AAI841-H50, a two-wire transmitter uses the module supply and signal path, while a four-wire transmitter has an external supply and sends its current into the designated input pins.

Can AAI841-H50 inputs and outputs be treated as sixteen identical channels?

No. AAI841-H50 has eight receiving channels and eight driving channels. Their current direction, terminal pins, accuracy figures and diagnostics are different.

What should be checked when an AAI841-H50 output reports an open circuit?

For AAI841-H50, verify the output-loop continuity and whether current is below the 0.65 mA detection threshold, then confirm that the connected load is within the permitted range.

Does AAI841-H50 require a separate HART module?

AAI841-H50 includes HART communication in the analog I/O module. The field loop still carries 4–20 mA, with HART data superimposed on that current path.

Which terminal style can be used with AAI841-H50?

AAI841-H50 supports documented pressure-clamp, KS-cable and MIL-connector arrangements. The selected terminal or cable must match the channel pin assignment.

What details prevent a wrong AAI841-H50 configuration request?

State AAI841-H50 in full and include the terminal interface, input transmitter type, output-load range and HART requirement. This separates the exact HART version from related analog modules.

Section 06

Customer Support

Moore Automation

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Moore Automation keeps the manufacturer, full order code, quantity and destination together in one enquiry record. Datasheet checks and commercial communication then refer to the same identifier.

Exact model recorded

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Product Name	Yokogawa AAI841-H50 Analog I/O Module
Item NO.	2932314
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	YOKOGAWA
Brand	YOKOGAWA
Creation Time	2026-11-13

Yokogawa AAI841-H50 Analog I/O Module Item NO.: 2932314

Yokogawa AAI841-H50 Analog I/O Module

Product Description

Product Specifications