In addition to the 0 to 10 volt DC or 4 to 20 milliamps signal usual from PID controllers, the TCB can be configured to modulate a valve in response to a TTL (5 volt) signal, or a 24-120 volt AC pulse of three to thirty seconds duration.
The TCB may be ordered less potentiometer if an external signal (e.g. 4-20ma) is to be used. The board was designed for easy standoff mounting in electrical panels supplied by others, and with screw terminal wiring connections. The TCB has been designed to work with Sporlan SEI/SEH Electric Expansion Valves, CDS Electric Suction Control Valves, and SDR Electric Hot Gas Bypass Valves of any capacity except 2500 step valves such as CDST-4 & CDST-7. Pin jumpers on the face of the board will permit changes in board control parameters to suit particular applications.