The E-PLEX 421QIM is an active low digital input module. It provides 4 channels of digital I/O in an encapsulated unit to detect inputs from equipment that switches to ground. The module has LEDs which will provide local verification of the status of the inputs.

NOTE:  THIS MODULE IS REPLACED BY AN 827OIM WITH CUSTOM FIRMWARE.

PLEASE CLICK HERE TO VIEW THE 827OIM PRODUCT PAGE

The 827OIM replacement will not constitute any logic changes, however, wiring changes will have to be made.