The APCSCR series are SCR Power Controllers (phase angle). The switch select-able control ranges for the Multi Input version are:  0-10V, 0-5V, 2-10V, 1-5V, 4-20ma, and manually using a potentiometer.

The power delivered to the load is proportional to the command signal input.  The Voltage Limit (VL) feature is used in conjunction with the line voltage compensation feature to limit the actual voltage delivered to the load.  The voltage limit is adjustable via a potentiometer located just below the input terminal block.  For this feature to work correctly, the line voltage compensation must be turned on and the power transformer for the APCSCR must be connected to the same mains as the load is connected to.  (See Figure 1).

See APCSCR Operation Manual for adjustment information.

A line to 24Vac transformer supplies power and phase information to the controller card. The transformer is connected across the AC power source as noted below. There is a feature to compensate for line voltage variation. By adjusting the phase angle automatically with line voltage changes, constant power is maintained at the load. To use the line voltage compensation feature properly, the 24Vac transformer should be fed from the same mains as the load circuit to be controlled per the wiring diagram per Figure 1. Line voltage compensation can be enabled or disabled via dip switch selections noted above.

A separate control transformer is required for each APCSCR assembly.

See User Manual for complete list of commands & wiring options.