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- For total garage count or level count. PSI manufactures three types of capacity counters.
Model 712: One UP count input, on DOWN count input, with FULL output relay.
- Model 749: Counter with eight UP count inputs, eight DOWN count inputs, with FULL output relay.
- Model 755: Counter with eight UP count inputs, eight DOWN count inputs, with FULL output relay or RS-232 communication port to drive spaces available.