Yokogawa AAI835-S03 CENTUM VP Analog I/O Module

SKU AAI835-S03

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Yokogawa
Product No.: AAI835-S03
Origin Japan
Product Type: Analog I/O Module
Payment: T/T, Western Union
Weight: 0.3 kg
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

The Yokogawa AAI835-S03 (Replaced by AAI835-S53) is a high-reliability analog input/output module belonging to the CENTUM VP distributed control system (DCS) series. Operating with standard 4 to 20 mA industrial instrumentation loops, this module provides 4 isolated input channels and 4 isolated output channels. The specific suffix layout designates this hardware as a standard type built without built-in explosion protection. To assure continuous loop execution across hazardous environments, the device is configured with an ISA Standard G3 chemical corrosion-resistant conformal coating option alongside an extended temperature endurance qualification spanning from -20 to 70 degC. Each field pathway is completely isolated from the system backplane and neighboring channels, allowing for direct installation in dual-redundant system architectures.

Features

Part of the CENTUM VP process control platform supporting dual-redundant configurations.
Complete channel-to-channel and field-to-system electrical isolation.
Integrated transmitter power supply capabilities built directly into the current input loops.
Enhanced durability featuring ISA Standard G3 conformal coating for aggressive atmospheres.
Extended ambient thermal design qualified for operation from -20 up to 70 degC.
Supports digital data overlays via native HART communication.

Applications

Simultaneous valve positioning control and flow transmitter monitoring.
High-integrity loops demanding channel-to-channel isolation to prevent ground loop faults.
Distributed control layouts situated in corrosive environmental conditions or unconditioned areas.
Critical process sectors requiring continuous operation via dual-redundant I/O configurations.

Ordering Information

Model/Suffix Code	Option Specification
AAI835	Analog I/O Module (4 to 20 mA, 4-channel input/4-channel output, 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	AAI835-S03 (Replaced by AAI835-S53)
Number of I/O channels	4-channel input / 4-channel output, isolated channels
I/O signal	Input: 4 to 20 mA; Output: 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 Between input/output and system: 500 V AC, for 1 minute Between input/output 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	Output: 0 to 750 Ohm (200 to 750 Ohm when operating between 60 to 70 degC in an ER bus node unit)
Circuit-open detection	Output: Less than 0.65 mA
Accuracy	Input: ±16 uA; Output: ±48 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 (KS1)
HART communication	Available

Installation Guidelines

Mount the module securely within its allocated slot on the CENTUM VP node backplane, ensuring complete seating of the rear multi-pin connections.
External barriers must be observed: A Zener barrier is not allowed to be connected with this module; use an isolation barrier if implementing intrinsically safe field layouts.
When using a MIL connector cable for field distribution, verify that the application withstanding voltage limits match the electrical boundaries of the chosen cable assembly.
Maintain clean air boundary lanes within the marshaling cabinet to ensure ambient conditions remain inside the -20 to 70 degC operational constraints.

Shipping & Returns

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.

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 technical warranty.

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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