Connecting Power To The Selectone System; Figure 6 Typical Central Power System - Federal Signal SelecTone Command Units 300VSC-1 Manuel D'installation Et D'entretien

MODEL 300VSC-1
4 5 17 1
TB1
SIGNAL LINES SHIELDED
TWISTED PAIR
24 Vdc
POWER SUPPLY

Connecting Power to the SelecTone System

INSTALLATION PRECAUTION — This device is to be installed by a trained
electrician who is thoroughly familiar with the national electrical code and local
codes and will follow the guidelines.
SHOCK HAZARD — Do not perform any installation or maintenance on this
system when power is on. Because the 300VSC does not have a power switch,
ensure that the power is disconnected before proceeding. Failure to heed this
warning may cause serious injury or death.
CROSSTALK/INTERFERENCE HAZARD — Cross talk, interference, or hum can be
induced in signal lines, causing poor audio output or confusing messages, which
interferes with the emergency warning capability of this equipment.
Do not install power lines in the same conduit as signal lines.
To connect power:
1. Connect one end of the supplied power cord to the AC power connector on the back of the 300VSC.
NOTE: Two power cords are included for 120 Vac or 240 Vac operation. Select the proper cord for
your installation.
2. Connect the other end to any standard 120 Vac 50/60 Hz or 240 Vac 50/60 Hz outlet. The 300VSC is
factory-set for 120 Vac 50/60 Hz operation. For instructions on how to change the input voltage, refer to
"Power Requirements and AC Voltage Selection" on page 7.
3. If you are using 24 Vdc either as a primary or auxiliary source of power, connect the "+" terminal of
24 Vdc power supply to the terminal
the terminal TB2-16
Model 300VSC-1 and Model 300VSC-1044SB SelecTone Command Units

Figure 6 Typical central power system

15 16
TB2
+ –
+
OUTPUT
–
TB2-15
(–24 Vdc) of the TB2 terminal block located in the back of 300VSC.
Installation and Maintenance Manual
MODEL
300GC
24 Vdc
MODEL
AM25CK
(+24 Vdc) and "–" terminal of the 24 Vdc power supply to
POWER
LINES
15