Bosch DCN Next Generation Installation & User's Instructions page 45

DCN Next Generation | Installation and User Instructions | Central Devices
8.3.4 Internal back-up battery
Use the X600 jumper block to connect and disconnect
the internal back-up battery of the central control unit
(refer to table 8.4).
Note
When your central control unit is new, you must
energize the central control unit to charge the
internal back-up battery. The internal back-up
battery is fully charged after 24 hours.
table 8.4: X600 jumper block (* = default)
Jumper shunt
1 and 2 *
2 and 3
Note
You only have a license code when you use the
system in combination with:
• The PC Control Software
• A remote controller
Bosch Security Systems | 2007-02 | 9922 141 70525
Description
Connects the internal back-up
battery. When you stop the
central control unit, the memory
of the central control unit is not
erased.
Disconnects the internal
back-up battery. When you stop
the central control unit, the
memory of the central control
unit is immediately erased. The
memory of the central control
unit contains:
• The license code
• The settings of the
interpreter desks.
8.3.5 Watchdog
Use the X605 jumper to enable or disable the watchdog
of the central control unit (refer to table 8.5).
table 8.5: X605 jumper block (* = default)
Jumper shunt Description
Present The watchdog is disabled. The
central control unit does not
start again after an error.
Not present* Enables the watchdog. The
central control unit starts again
after an error.
Note
When you disable the watchdog, the system
can operate incorrectly.
8.3.6 Ground
Use the X104 jumper block to connect and disconnect
the system ground and the ground of the central control
unit (refer to table 8.6). For example, you can connect
the system ground and the ground of the central control
unit to prevent hum.
table 8.6: X104 jumper block (* = default)
Jumper shunt Description
1 and 2 Connects the system ground
and the ground of the central
control unit.
2 and 3 * Disconnects the system ground
and the ground of the central
control unit.
Note
When you connect the system ground to the
ground of more than one device in the system,
you can create ground loops. Ground loops can
cause hum.
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