Specifications
Power supply
Primary power terminals
The control panel uses an 18 VAC, 22 VA internally fused transformer (CX4010) for its primary
power source. The control panel draws 125 mA when idle and 155 mA when in an alarm state.
The auxiliary power available for continuously powered devices is 800 mA.
Transient suppressors and spark gaps protect the circuit from power surges. This protection
relies on the ground connection at the earth ground terminal, marked with the icon. Ensure
that you connect the terminal to a proper ground.
Refer to Connect earth ground, page 27.
AC power fail
The system indicates an AC power failure when the 18 VAC terminals do not have power. The
AC Fail Time parameter sets the number of minutes or seconds without AC power before the
control panel reports the failure, and the number of minutes or seconds after the power
returns before the control panel reports restored power.
Self diagnostics at power up and reset
The system performs a series of self-diagnostic tests of hardware, software, and programming
at power up and at reset. The self-diagnostics tests complete in approximately 10 to 30 sec.
If the control panel fails any test, a System Trouble message appears at the keypads.
Install the transformer
!
Caution!
Do not short-circuit the terminals of the transformer: Shorting the terminals opens the
internal fuse, causing permanent failure. Connect the transformer to the 18 VAC terminals of
the control panel before plugging it into the power source.
Notice!
Plan ahead
Route telephone, SDI2 bus wiring, and sensor loop wiring away from any AC conductors,
including the transformer wire. AC wiring can induce noise and low level voltage into adjacent
wiring.
1. Use 18 AWG (1.02 mm) wire minimum (12 AWG [2 mm] maximum) and connect the
transformer to the control panel. Make the wire length as short as possible. Do not
exceed 50 ft (15 m).
2.
Connect the wire to the control panel.
3. Connect the wire to the transformer.
4. Plug the transformer into an unswitched, 120 VAC, 60 Hz power outlet only.
5. Secure the transformer to the outlet with the screw provided.
Secondary (DC) power terminals
A 12 V sealed lead-acid rechargeable battery (D126/D1218) supplies secondary power for
auxiliary and alarm outputs, and powers the system during interruptions in primary (AC)
power.
6
6.1
6.1.1
6.2
30 en | Power supply Control Panel
2014.05 | 11 | F.01U.287.180 Installation and System Reference Guide Bosch Security Systems, Inc.