Harmony Relay. Socket for narrow interface relays RSL with coil voltages of 60 VDC. A control voltage of 110 VAC/DC can be connected, which is adjusted to the coil voltage of 60 V. The socket includes an LED to indicate the control status, a lever for easy removal of the relay, and a protection module. The wire connections are made via spring clamp terminals. Additionally, busbars can be connected.