Yokogawa AAI135-S03 CENTUM VP Analog Input Module

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12-month warranty
Free returns within 30 days

Manufacturer: Yokogawa
Country of origin:Japan
Product Type: Analog Input Module
Payment: T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description

The Yokogawa AAI135-S03 (Replaced by AAI135-S53) is a high-performance analog input module belonging to the CENTUM VP distributed control system (DCS) series. Purpose-built to receive standard 4 to 20 mA industrial field signals, this module features an 8-channel input configuration with complete galvanic channel-to-channel isolation. The specific suffix layout designates this hardware as a standard type engineered with no explosion protection options. To ensure uninterrupted loop tracking in aggressive plant environments, the unit comes outfitted with an ISA Standard G3 chemical corrosion-resistant conformal coating option and an extended temperature endurance qualification spanning from -20 to 70 degC. Each field pathway is thoroughly isolated from both the system backplane and neighboring channels, allowing for seamless integration into high-availability, dual-redundant control system topologies.

Features

Deployed within the CENTUM VP control platform supporting dual-redundant hot-standby architectures.
Features 8 analog input channels with complete galvanic field-to-system and channel-to-channel electrical isolation.
Integrated transmitter power supply capability designed directly into the input circuit loops to drive 2-wire instruments.
Enhanced hardware durability via ISA Standard G3 conformal coating for harsh chemical or corrosive environments.
Extended thermal operational profile rated for steady execution from -20 up to 70 degC.
Supports advanced field asset diagnostics via native digital HART communication.

Applications

High-density process monitoring loops in refinery, petrochemical, and power generation facilities.
High-integrity instrumentation setups requiring dedicated channel isolation to eliminate ground loops.
Distributed control infrastructure positioned in aggressive, unconditioned outdoor environment spaces.
Safety-critical or high-availability processing lines demanding dual-redundant input configurations.

Ordering Information

Model/Suffix Code	Option Specification
AAI135	Analog Input Module (4 to 20 mA, 8-channel, Isolated channels)
-S	Standard type
0 (5)	With no explosion protection
3	With ISA Standard G3 option and temperature (-20 to 70 degC) option

Technical Specifications

Items	Specifications
Manufacturer	Yokogawa
Model	AAI135-S03 (Replaced by AAI135-S53)
Number of I/O channels	8-channel input, isolated channels
I/O signal	4 to 20 mA
Allowable input current	25 mA
Withstanding voltage	Between input and system: 500 V AC, for 1 minute Between input channels: 500 V AC, for 1 minute
Input resistance	Power ON: 290 Ohm (at 20 mA) to 450 Ohm (at 4 mA) Power OFF: 500 kOhm or larger
Allowable load resistance	—
Circuit-open detection	—
Accuracy	±16 uA
Data update period	10 ms
Transmitter power supply	15.0 V or higher (at 20 mA); 29.3 V or less (at 0 mA)
Temperature drift	±16 uA / 10 degC
Maximum current consumption	360 mA (5 V DC), 450 mA (24 V DC)
Weight	0.3 kg
External connection	Pressure clamp terminal, MIL connector cable, dedicated cable
HART communication	Available

Installation Guidelines

Align and insert the input module into its specified node backplane interface slot within the CENTUM VP rack, confirming that all backplane connectors latch with zero binding tension.
Maintain critical loop protection constraints: A Zener barrier is not allowed to be connected with this module. An isolation barrier must be implemented when deploying this device within intrinsically safe field loops.
For installations routing through a MIL connector cable interface, check that the overall application withstanding voltage limitations conform to the distinct technical boundaries of the chosen wiring cable harness.
Keep cabinet ventilation channels clear to permit optimal convection airflow, ensuring internal temperatures stay safely inside the designated -20 to 70 degC envelope.

FAQ

Does the module support the connection of external Zener barriers?

No, a Zener barrier is not allowed to be connected with this module. An isolation barrier must be used instead when the device is deployed in intrinsically safe applications.

What are the exact channel isolation capabilities of this device?

The module features complete isolation between the field circuits and the internal system logic, as well as galvanically isolated pathways between each individual input and output channel, rated at 500 V AC for 1 minute.

How does the allowable load resistance change under high operating temperatures?

The standard allowable load resistance for the output channels is 0 to 750 Ohm. However, when the module is used in ambient temperatures from 60 to 70 degC inside a conforming ER bus node unit, the allowable load resistance adjusts to a window of 200 to 750 Ohm.

What happens to the module input resistance when the system is powered down?

When the power is ON, the input resistance varies dynamically from 290 Ohm (at 20 mA) to 450 Ohm (at 4 mA). When the power is OFF, the input resistance switches to a high impedance state of 500 kOhm or larger.

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Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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Product Image	Model Number / Title	Condition	Availability	Action
	Allen-Bradley 1769-IF8 Compact I/O Analog Input Module	Original New	In Stock	View Details

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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