Yokogawa AAI835-S03 Analog Input Module

Module Overview

This analog input module measures up to 16 field transmitter signals simultaneously. You can install Yokogawa AAI835-S03 directly into CENTUM VP I/O racks. The unit accepts standard 4-20 mA signals from pressure and temperature transmitters. It converts analog values to digital data for controller processing.

Technical Specifications

Board Layout and Components

The PCB arranges 16 input channels in four groups of four. A 16-bit analog-to-digital converter serves all channels via a multiplexer. Moreover, 224 discrete components include precision shunt resistors and protection diodes. Tantalum capacitors provide stable voltage references for accurate conversions. Consequently, the module maintains reading accuracy within 0.05% over temperature.

Installation Process

You can mount Yokogawa AAI835-S03 into any CENTUM VP I/O rack slot. The backplane connector supplies power and transfers digital data to the controller. Furthermore, a removable terminal block accepts field wiring for all 16 loops. Configuration software assigns each channel to process tags easily.

Performance Advantages

This module scans all 16 channels every 20 milliseconds. The 16-bit resolution provides 65,536 distinct measurement steps per channel. Therefore, the module captures tiny signal changes from precise sensors. The 500V isolation also protects the controller from field wiring noise.

Safety and Compliance

Yokogawa AAI835-S03 meets CE and RoHS industrial standards. The board discharges stored energy below 3V within five seconds. Hence, technicians face minimal electrical risk during installation or replacement.