Technical reference, Ungrounded. %rh ranges (on, Bulb – Watlow Electric Ramping and Profiling Microprocessor-Based Control SERIES 1500 User Manual
Page 81: Channel and are user selectable as, Solid state relay, 0.5a @ 24vac, Upon channel #1 rtd, 1 thru, Communlcatlons, 3 barrier, Power