circuitron 5604 er-1 external relay spdt

Circuitron -- ER-1 External Relay -- Single pole, double throw, 6-amp relay mounted on a circuit board, with driver circuitry to be directly connected to the output of any Detection Unit. Provides high current, bidirectional contacts for train blocks. Ideal for use with Block Occupancy Detectors to power blocks for automatic train control. Requires 12V DC power supply.