M4200 - User manual
Revision: 07.03.2017 Page 8
Normally energized
Figure 5 shows the connection of the output terminals when the relay is programmed to be normally
energized.
It is possible to programme each of the output relays to operate individually as normally energized. This
means that the relay changes position from terminal 33 to terminal 35 (siren relay) when the power is
switched on.
When an incoming alarm activates the relay, the position will change from terminal 35 to 33 (siren relay).
The same scenario will appear if the supply voltage disappears from the alarm monitor. This is a big
advantage when alarm is needed, if breakdown of the alarm system occurs.
If supply voltage disappears from the alarm monitor and alarm is needed, it is very important to use another
supply unit for the output relays, than used for the supply voltage of the alarm monitor.
The output relay is supplied from another source than the alarm monitor. The siren is connected to the
output relay. The siren is connected to another ÷ (negative supply) than that of the alarm monitor.
NOTE:
Regarding load capacity for the output relays, please refer to the section Load capacity on page 9.
To use any of the three output relays as normally energized, programming is needed. For further information
about programming please refer to the section Programming by switches on page 14 or Programming by
PC on page 26.
Figure 5. Wiring example, normally energized relay.
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