The relay have got two switch ON section and enable to switch ON in accordance sequence two circuits of lights or diferent recuiver from many places by pushbuttons connected in parallel. Switching the relay into another cycle phase is made by another current pulse triggered by pressing any bell push connected to the relay.
Functioning
Relay power is indicated by a green LED U. Sequential relay has two separate outputs: R1 and R2. Contact state (open/closed) is forced sequentially in accordance with a predetermined program. State of contact is switched by a subsequent impulse from the the control key. Switching of R1 and R2 contacts is indicated by the corresponding R1 and R2 red LEDs. In case of a power failure, the contact state is reset. When the supply voltage returns, relay starts with a sequence number 0.
Attention!
The BIS-414 230V and BIS-414i 230V are compatible with bell pushes equipped with fluorescent lamps. 
Power of receivers
These data are indicative and will heavily depend on the design of a specific receiver (that is especially important for LED bulbs, energy-saving lamps, electronic transformers and pulse power supply units), switching frequency and operating conditions.
Tips
Illuminated buttons
If too many illuminated buttons are connected, the lighting may switch on spontaneously or switch on permanently Maximum load current The contact current given in the technical data is the maximum value and may be subject to restrictions – more information. If the information provided indicates that the relay in the device is insufficient, it is recommended to use an external switching element (e.g. contactor) adapted to switch large surge currents. State memory The relay does not have a “memory” of the contact position. This means that after the power supply is switched on, the relay contact will always remain in the off state. Resistance to surge currents The device uses an “inrush” type relay characterized by high resistance to short-term surge currents generated, for example, when switching on LED lamps, ESL fluorescent lamps, electronic transformers, discharge lamps, etc.
