AAI841-H00 YOKOGAWA Analog I/O Module Datasheet & Manual

YOKOGAWA AAI841-H00 Analog I/O Module 8-Channel HART

YOKOGAWA AAI841-H00 Analog I/O Module 8-Channel HART

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YOKOGAWA AAI841-H00 Analog I/O Module The YOKOGAWA AAI841-H00, also cataloged as the AAI841 Analog I/O Module, operates as a dedicated...

SKU: AAI841-H00

Manufacturer: Yokogawa
Product No.: AAI841-H00
Product Type: Analog I/O Modules
Product Origin: Japan
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA AAI841-H00 Analog I/O Module

The YOKOGAWA AAI841-H00, also cataloged as the AAI841 Analog I/O Module, operates as a dedicated hardware component for simultaneous 8-channel analog input and 8-channel analog output execution within CENTUM VP process control platforms.

Suffix Breakdown & Model Matrix

AAI841: Base model for 8-channel analog input/8-channel analog output (4-20 mA).
-H: Indicates support for digital communication via HART protocol.
00: Standard base version.
K4A00: Option code representing the inclusion of the ATK4A-00 KS cable interface adapter for system cabling.

Hardware Specifications

Parameter	Specification
Model	AAI841-H00
Brand	YOKOGAWA
Origin	Japan
Weight	0.3 kg (Module), 2.0 kg (Total shipping weight)
Dimensions	Standard I/O module footprint
Operating Temp	-20 deg C to 70 deg C
Power Consumption	310 mA (5 VDC), 500 mA (24 VDC)
I/O Channels	8 Inputs / 8 Outputs (non-isolated)
Output Load	0 to 750 Ohm
Accuracy	Input: +/-16 uA, Output: +/-48 uA
Data Update Period	10 ms

DCS Process Control & Connectivity

The AAI841 utilizes the 4-20 mA HART loop protocol to manage bidirectional communication with smart field instruments. The module executes precise loop control by maintaining a consistent 40 ms output step response and 100 ms input step response. Given the non-isolated circuit design, the module manages common-mode voltage fluctuations through high-impedance input stages (min 500 kOhm power-off resistance). Furthermore, the internal logic provides active transmitter power supply regulation, maintaining between 14.8 VDC and 26.4 VDC, which allows for selectable 2-wire or 4-wire transmitter compatibility on a per-channel basis.

Frequently Asked Questions (FAQ)

Q: Does the AAI841-H00 support online module replacement (hot-swap)?

A: Yes, the module supports hot-swapping when configured within a dual-redundant pair to maintain process continuity.

Q: How does the module handle circuit-open conditions?

A: The AAI841 includes integrated diagnostic circuitry that triggers an open-circuit fault flag when output current drops below 0.65 mA.

Field Installation Guidelines

Grounding: Because the AAI841 channels are non-isolated, ensure that all signal commons are bonded to a common instrument ground bar to prevent circulating currents that could induce measurement offsets.
Shielding: Use shielded twisted-pair cabling for all analog signal runs. Terminate cable shields strictly at the field side or the cabinet entry point, but avoid ground loops by maintaining a single-point connection.
Thermal Management: Maintain a minimum clearance of 50 mm above and below the module to facilitate vertical airflow. In high-density cabinets, utilize forced ventilation to keep ambient temperatures below the 70 deg C limit.
Wiring Interface: When using the ATK4A-00 adapter, ensure all MIL connector latches are fully engaged and locked to prevent intermittent signal loss due to vibration or thermal expansion.

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