A solid state relay interface module that has a 24V DC input and a 24V DC output. * Tension spring terminal * 35mm rail (EN 60715) mounting * SPST-NO solid state relay contacts * Instant ejection of relay by plastic retaining clip * Integral coil indication and protection circuit * Mounted coupler relay * Free wheel and polarity-reversal protection diode * Holding/dismantling clip * Positive isolation to VDE 0160/EN 50178 * UL, CSA Approved