A timer BI-TIMER is used to regular switch on and off the relay output. The timer can operate continuously or stop after counting down the target number of cycles (from 1 to 999 cycles). The time of switching on and off is set by one of three sub-ranges:

• from 1 s to 99 s with resolution of 1 s,

• from 1 min to 99 min with resolution of 0,1 min (6 s),

• from 10 min to 999 min with resolution of 1 min.

By means of additional settings it is possible to define the controller's behaviour after the restart caused e.g. by supply failure.

The settings are also stored when there is no power supply. They are selected from a keypad during the operation of the device. The BI-TIMER has got a function of pause that enables to hold the time countdown at any time and then to resume the countdown.

The control is performed by means of a relay output, voltage-free (NO and C contacts of a relay). Load capacity of the contacts is of 3A with operation in the circuit supplied with AC voltage up to 230V, 50Hz or in the circuit supplied with DC voltage up to 28V. In the circuit of contacts there has been installed a fuse 3.15 A, 250 V.