Helm HM1525, Instruction Manual

Page: 26 / 28

HM1525 Weigh Scale Module
Page 26
The Weigh Scale module communicates to the processor through the parallel backplane
interface and re5Vdc and +24Vdc power from the power supply through the backplane.
No external power supply is required. The MicroLogix and CompactLogix platforms can support
up to 8 I/O modules. You may install up to 3 Weigh Scale modules using the base power
supply. An additional power supply can be added to support more than 3 modules.
Each individual channel on the module can receive input signals from strain gage based
sensors. The module converts the analog values directly into digital values.
The sensors are wired to the modules using the rightmost bank of inputs.
The pin-out is shown below.
Sensor
Wiring
System
Operation
To ensure proper operation
and
high immunity to
electrical noise, always use
Helm strain gage cable.
To limit noise, keep strain gage cable as far
away as possible from power and load lines.
The module can support up to
two sensor inputs.
DO NOT attempt to parallel
additional gages
as you will
cause damage to the module
and void product warranty.