Thermolec Application &Technical Notes - Manual (Page 37)

THREE EASY STEPS
STEP 3 - (continued)
SCR Controller
The SCR is a time proportioning type controller that modulates the heater and supplies the exact amount
of power to match the heat demand.
Input: Thermistor thermostat (RT or DT),
0 - 10 VDC, 4 - 20 mA, 0 - 135 Ohms.
Output: Single or three phases load,
20, 30, 40 and 80 Amps @ 600 V. max
SCR controller Open Type
SCR controller Enclosed Type