Variable phase angle trigger module for ac loads.

Inclusive manual control potentiometer and minimum setpoint trimmer
Industrial panel mounted enclosure
Tamperproof
Single-hole panel mounting
No heatsink required
Suitable for most ac resistive or inductive loads

The number of complete mains cycles during fixed repeating periods (typically 1 to 10 seconds) is varied, thus altering the duty cycle or on-/off-time ratio. Trigger pulses coincide with the zero-crossing times of the mains supply thus ensuring no RFI is produced when using resistive loads.