The Carlo Gavazzi Type PCB01 Asymmetrical Recycler Timer is a combined function timer available with up to two SPDT relays. The timer supports up to four knob selectable functions: asymmetrical recycler ON first, asymmetrical recycler OFF first, one shot time function, and two state delay on operate for the 2 relays version only.

After selecting the function via the upper knob, the center and lower knobs are set on a relative scale of 1 to 10 with respect to the chosen range. The T1 time range can be adjusted by setting the DIP-switches 1 to 3, and the T2 time range can be adjusted via DIP-switches 4 to 6. The DIP-switches can be accessed using a screwdriver. Selectable ranges are: 0.1s to 1s, 1s to 10s, 6s to 60s, 60s to 600s, 0.1h to 1h, 1h to 10h, 10h to 100h.