Rockwell Automation MHB44IND Pulse Input and Analogue Output Module - Manual

Triguard SC300E
MHB44IND
Pulse Input and Analogue Output
Module
(MHB44IND)
Issue 2 October 2005
INTRODUCTION
PURPOSE
The MHB44IND module (Figure 1-1) supports four pulsed voltage inputs for interfacing with field
detectors, and supplies 0 - 22mA analogue outputs for process control.
The module is a rack mounted, 9U high unit that provides the output control interface between
the SC300E processing environment and the user field environment. It has four current loop
output channels. All field inputs and outputs are galvanically isolated from the SC300E system
but have a common supply connection.
Circuit triplication and voting procedures make the module single-fault tolerant and latent
testing ensures that the failure of a channel will be recogised and reported to the SC300E
system. Front panel indicators show the state of the circuit ‘on-line’ status and the health of
the module. Sockets are provided on the front panel for monitoring the outputs.
The module is compatible with ‘dual slot hot repair’, and can be fitted in any of the ten I/O slots
in the SC300E chassis. ‘Wrong slotting’ is prevented by physical coding. The SC300E system
software identifies the module via a built-in hardware identifier.
Channel outputs leave the module via the DIN 41612 ‘rear plug-up’ system on the chassis
backplane.
This document is intended to provide a general understanding of the MHB44IND sufficient to
enable basic maintenance procedures to be effected in the field.
ASSOCIATED DOCUMENTATION
Reference No Title
008-5097 Chassis User Manual
008-5201 TPH44AIC 4-Channel Pulse Input and Analogue Output Termination Card
User Manual
008-5108