SEL-2505 Remote I/O Module | Schweitzer Engineering
The SEL-2505 Remote I/O Module has eight digital inputs, eight digital outputs, and a fiber-optic communications port. Use two optical fibers instead of 32 wires
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User Guide
Connect the wire pair from each dry relay contact to the green screw-down terminals on the front of the units. The terminal blocks may be removed on the 4 channel system for ease of wiring by pulling the