The Chromalox C4 Multi-Zone SCR Power Controller manages both single- and three-phase industrial heating load applications, which require zero cross firing modes. It is capable of up to four independently controlled single-phase loads, two three-phase/two-leg loads, or one three-phase/three-leg load (with or without an additional single-phase load). With four universal main process inputs, four configurable outputs (relay, logic, TRIAC, continuous), two digital inputs, and two configurable alarm outputs, it can accommodate a wide number of installations. With each zone outfitted with an independent current transformer input, full thermal and electrical diagnostics can be performed from loop break alarm, heater break, SSR short circuit, short circuit, and over-temperature alarm. Equipped with MODBUS RTU communication capabilities, it has the ability to host a number of additional fieldbus communication options including MODBUS TCP, Profibus, Profinet, Real Time Ethernet IP, DeviceNet, EtherCat, or CANopen. 800-443-2640; www.chromalox.com