Marmitek VIDEO DOORPHONE - Manual (Page 6)

you have installed multiple monitors in the house (maximum 3 extra), then you can talk among each other
using the intercom button (14).
5. EXTRA POSSIBILITIES WITH YOUR DOORGUARD400
a. Connecting an electric door opener
- To open the door from the monitor (figure 8).
- You need an electric door opener with its own power supply. The door-open-contact of the monitor
is a potential-free normally-open (NO) contact.
- The maximum load for this contact is: DC24V/1A or AC24V/1A.
- You need to connect the door opener onto the L+ en L- connectors of the monitor, using the
supplied cable.
b. Connecting multiple monitors
- To be able to see who is at the door from several places (max. 4). Upon that, you now have an
intercom system (figure 9). Available separately:
DoorGuard400 Colour monitor: art.no: 09743 (E version) 09744 (UK version).
DoorGuard100 Black/white monitor: art.no: 09692 (E version) 09693 (UK version).
- Beware: Only the last monitor that you connect
should be switched on 75 Ohm.
- The other monitors should be connected
parallel. To connect the extra monitor, the
10meter connection cable is provided with an
extra connector at the monitor end. You can
easily connect an extra monitor to this
connector. However, it is important that there
be sufficient room behind the monitor for the
attachment of the connectors. It is advisable to
use an installation box.
- If you want to bridge a greater distance, then
check out the following table for the required
cable type.
6 © MARMITEK
door opener
door opener
door opener
Figure 8.
Figure 9.
Terminals function:
Brown (R1)
: VIDEO
Black (R2) : GNO
White (R3) : AUDIO
Red (R4) : VCC
L+ : dooropener
L- : dooropener