Cebek CD-46 module is a hole number counter. With the use of PCB DIL switches a number between 1 and 999 can be selected then the relay output will energise each time the indicated pulse number will coincide with the pre-selected number. The output will be maintained connected till the next pulse, this process will be automatically renewed, or you do a reset It doesn’t use display, the count up/down is done in internal mode. Received pulses are indicated through a LED.