Power Supply; Dc Supply; Relay As A Floating Contact; Operation - Fronius Signal Card Operating And Installation Instructions

Power supply

DC supply

Power is supplied to the Fronius Signal Card via the inverter DC supply.
However, any consumers (e.g. signalling devices) connected to the relay
terminals are not powered from this source.
Relay as a
The relay is galvanically (electrically) isolated (floating contact) from the
floating con-
Fronius Signal Card supply and the electronics. An independent power
tact
supply for the consumers is therefore necessary.

Operation

General

If a service code is signalled, the Fronius Signal Card will respond in the
manner described for permanent and temporary service codes. The relay
closes and, depending on the jumper setting, the buzzer may also sound.
The relay remains closed until:
- a button is pressed on the inverter
- or the DC supply is switched off and back on again
Special fea- Important! Only switching the DC supply back on will return the relay to
tures its original position.
As a result it is possible that the relay will remain switched even after the
DC voltage is lost (evenings). We therefore recommend fitting an ON/OFF
switch.
11
Power supply