Allied Electronics & Automation: Opto 22 SNAP-IDC5
The SNAP-IDC5-SW and SNAP-IDC5-SW-NC modules provide four channels of contact status input. Each module supplies 15 volts of power to an external dry contact switch. The SNAP-IDC5-SW senses switch closure; the SNAP-IDC5-SWNC senses switch opening. Each user-supplied switch is connected with two wires.