Modicon B553

The MODICON B553 Universal DC Input Module (True High) conditions four independently useable DC input signals (sharing common source and "return") to the signals used internally in the controller. This module provides the capability of using discrete input voltages varying from 9 to 56 volts DC. The "True High" module requires the inputs to be wired to positive VDC since the module defines an ON condition (true) as "high" voltage level.

DC True High Input
9-56 VDC Universal inputs DC Model - True High

Terminal assignments
1: DC IN
2: DC Return
3: Input 1
4: Input 2
5: Not used
6: Not used
7: Input 3
8: Input 4

See also: Schneider B553, Gould B553, AEG B553