Carlo Gavazzi RGC3P60I30C1DM Solid State Relays 3-pole DIN-rail mount SCR, Proportional control (1x FC) with monitoring, Operating voltage (Ue): 180 - 660 Vac (1200 Vp), Rated current (Ie): 30 Aac, Input: 0 - 20 / 4 - 20 / 12 - 20 mADC, External supply: 24 Vdc/Vac, Built-in overvoltage protection