Download DCB, DCFCB, and DCFCTB Models

Functional Description
The thresholds are in the following table.
Table 18 Thresholds
Input
AC fail internal
AC fail external TR
Battery 12 V
Battery 48 V
Intrusion
Stuck Relay Detect
Threshold
57 Vac +/- 5%
40 Vrms +/- 1%
12.7 V +/- 3%
43.5 V +/- 3%
Door Open
relays off & current =
50-300 A
1.0-3.4 V
Pushbutton
Motor fuse
Local Activation
Time
57 sec +/- 1
2.2 sec + 1 sec x site #
20 sec
20 sec
555 mS
222 mS
5 sec
10 sec
Growl Test
The Standard Growl Test runs the rotator for 12 seconds and the chopper motor until
the sensors latch or a maximum of 2 seconds. This function is commonly used when
doing periodic testing to verify proper operation while generating minimal sound.
Control Cabinet Functional Descriptions
The dc Control Cabinet has the following main parts:

Motor Contactors

Battery Charger

Power Distribution and Fusing

Radio Transceiver (optional)

FC Controller Board (optional)
Motor Contactors
Two 200 A motor contactors are used for switching the 48 Vdc power to the siren
motor through K2, and the rotator motor through K1. The contactors are controlled
by the relay outputs on the DCB, DCFCB, and DCFCTB.
A third optional contactor, K3, is used to switch between the rectified 48 Vdc
provided by the 240 Vac transformer option and the 48 Vdc provided by the four
batteries in the battery cabinet. The switching occurs automatically when the 48 Vdc
provided by the 240 Vac transformer fails.
The wiring to the siren and rotator motor is protected by a 200 A fuse.
DCB, DCFCB, and DCFCTB Models
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