ABB IMASI23 Analog Input Module

The IMASI23 Analog Input Module is a Harmony rack I/O

module that is part of the Symphony Enterprise Management

and Control System. It has 16 analog input channels that

interface isolated thermocouple, millivolt, RTD, and high level

analog signals to a controller with an analog-to-digital conversion

resolution of 24 bits. Each channel has its own analog-

to-digital converter and can be independently configured to

handle the desired input type. These analog inputs are used by

a controller to monitor and control a process.

The IMASI23 module can be used as a direct replacement for

the IMASI03 or IMASI13 modules with only minor modifications.

Changes to specification S11 in function code 216 are

required to handle the differences in resolution choices. Verification

of power supply sizing calculations and system current

requirements could be necessary because of the change in

power consumption.

This instruction explains the IMASI23 module specifications

and operation. It details the procedures necessary to complete

setup, installation, maintenance, troubleshooting, and

replacement of the module.