The Outpost EVO2, WASP2 and COBRA2 products can have 1 -2 counter channels depending on product code.
Counter channels are designed to read "pulse output" flow readings from power, water or gas meters. It is designed to accept pulse outputs that are either "dry contact" or reed-switch type output, or transistor "open collector" or "open-drain" type outputs.
General Characteristics of the counter channel:
- Minimum pulse width (high and low) is 25 ms (20 Hz at 50% duty cycle)
- 1 M ohm pull-up to 2.8 V
- Tolerant to 30 V permanent over-voltage accidentally applied to the counter input.
Diagram of typical counter channel connected to a dry contact or reed switch: