4-Digit Up/Down Counter Module - Preset and Relay (25mm Digits)

The Cebek CD-8 module is a 4-digit UP / DOWN counter with Preset function, relay output and a 25mm (1.0") LED display. Preset allows you to set a number in count UP mode. Once this number is reach the relay activates and the count stops (ideal for process control automation).

The counter starts at zero and increases by one digit (up to a maximum of 9,999) each time a count input is received. It can also count down, subtracting from the count.

Control Inputs - accept simple voltage free make contact closure (e.g. a push button, relay closure) or injection of an external negative going pulse (5Vdc). The 5 control inputs are:

• Count Up - increase count by 1 for each input
• Count Down - decrease count by 1 for each input
• Trigger - sets relay to activate on reaching Preset value (or zero depending on Mode settings below)
• Reset - zeros the count and display
• Next - allows counting on (up or down) when Preset is reached

Programmable Modes - the board can be programmed to operate as follows:

• Preset Number - the number on which the counter will stop (or start)
• Count Mode - start count up from zero or start count down from Preset value
• Relay Activation - either on count equal to Preset value or on count equal to Zero
• Input Frequency Filter - 100 Hz or 4KHz debounce
• Option to save last count number to memory on power loss (close header pins - Jumper not included)

The counter always stops when the count equals the Preset value (or zero depending on mode set). Reset or Next must be used to continue.

The counter comprises a control board and separate display board connected by a 20cm ribbon cable to allow versatile mounting options.

Also available with 13mm, 25mm and 100mm display board sizes (see table below).