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5. EXTRA POSSIBILITIES WITH YOUR DOORGUARD300
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:
DoorGuard300 Black/white Hands Free monitor: art.no: 09786 (E version) 09787 (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 remaining monitors are to be connected
parallel. The DoorGuard300 monitor is provided
with an extra connector for the connection of an
extra monitor.
- If you want to bridge a greater distance, then
check out the following table for the required
cable type.
Cable length Required cable type
1-25m 4 core cable of minimum 4x 0,55mm
2
25-50m coax cable, 75 ohm of minimum 0,5mm
2
+ 2 wire audio 0,35mm
2
50-100m coax cable, 75 ohm of minimum 1.0mm
2
+ 2 wire audio 0,35mm
2
100-300m coax cable, 75 ohm of minimum 1.5mm
2
+ 2 wire audio 0,5mm
2
c. Marmitek Camera corner bracket
To be able to mount your DoorGuard300 camera in the corner of the door frame. Art.no: 09746
6 © MARMITEK
door opener
Figure 9.
Terminals function:
Brown (R1) : VIDEO
Black (R2) : GNO
White (R3) : AUDIO
Red (R4) : VCC
L+ : dooropener
L- : dooropener
door opener adaptor
indoormonitor
adaptor
outdoor station
door opener
figure 8
DoorGuard300 03-07-2007 12:05 Pagina 6