Honeywell Rc500 Remote Terminal Unit Rc-scontrl Honeywell Rc500 Remote Terminal Unit Model#: Rc-scontrl Rev: 1.22 Ratings: 30Vdc @175Ma Amb: T4A @70°C Class I, Division 2 Groups A, B, C & D Ii 3 G, Ex Na Iic T4 X Tamb 65°C Hon11Atex0100X 10-30Vdc Weight: 370 Gm