Setup guide

Dedicated Micros ©2007
21
BX2
5K6
1K2
Normally Closed, the resistive value is 1.2KΩ, as the circuit does not see the 5.6KΩ resistor.
5K6
1K2
Open Circuit (tamper), the resistive value is innity as the circuit has been cut and therefore is ‘open’.
5K6
1K2
Short Circuit (tamper), the resistive value is 0Ω.
WARNING: The maximum rating of all the relays is 500mA @ 48V, exceeding this load will cause damage to
the relays.
Connecting 485-bus devices
The unit uses the 485-bus networking system to allow multiple units, remote keyboards, alarm modules, video
switchers, and other accessories to be connected together. The total length of the 485-bus network can be up
to 1500m (4900ft).
Connecting additional alarm modules
Optional alarm modules (DM/CI01) can be added to the unit to increase the number of alarm inputs. The unit
can support multiple alarm modules connected to the 485-bus.
To add alarms:
1. Connect the corresponding alarm contact to the alarm input, i.e. Alarm 2 would be connected
between ground (GND) and A2.
2. If multiple alarm modules are required then each will need to be addressed; consult the alarm
module documentation for details.
3. Connect the 485-bus cable from the alarm module to one of the 485-bus sockets on the unit.
4. The polarity of the alarms (normally open/closed) is set in the ‘Alarms and Presets’ menu page.
A1 A2 A3 A4
GND