• 4 active low digital inputs.
• Local LED status indication.
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.
The 827OIM replacement will not constitute any logic changes, however, wiring changes will have to be made.