Bosch Appliances 9922 141 70691 en manual Internal back-up battery, Watchdog, Ground

DCN Wireless Installation and User Instructions Central Devices

en 42

10.3.4 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 10.4).

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.

10.3.5 Watchdog

Use the X605 jumper to enable or disable the watchdog of the central control unit (refer to table 10.5).

table 10.5: 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.

table 10.4: X600 jumper block (* = default)

Jumper shunt	Description
1 and 2 *	Connects the internal back-up
	battery. When you stop the
	central control unit, the memory
	of the central control unit is not
	erased.
2 and 3	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.

Note

You only have a license code when you use the system in combination with:

•The PC Control Software

•A remote controller

Note

The subscription list is not erased when the internal back-up battery is empty. The subscription list is stored in another location.

Note

When you disable the watchdog, the system can operate incorrectly.

10.3.6 Ground

Use the X104 jumper block to connect and disconnect the system ground and the ground of the central control unit (refer to table 10.6). For example, you can connect the system ground and the ground of the central control unit to prevent hum.

table 10.6: 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.

Bosch Security Systems 2007-02 9922 141 70691 en