Crown CTs 2000 Operation Manual page 41

(CLASS 2) POWER
OUT TO AR2000-P
GND +24V
POWER OUT
TO PRESET
ABOVE
CAUTION: TO REDUCE
THE RISK OF FIRE,
REPLACE ONLY WITH
BUSS 250V, 4A GMT FUSE
ALARM
(CLASS 2)
INDICATOR
- +
POWER OUT
TO AR2000-Z
GND +24V
(CLASS 2)24VDC
120 VAC, 50/60 HZ, 2A
BACKUP POWER
240 VAC, 50/60 HZ, 1A
-
+
PS600
24VDC
BACKUP POWER
TO 120VAC
CAUTION
Improper installation could render this
system inoperable, interfering with the
indicating nature of this product. The instal-
lation must conform to applicable local and/or
National Electrical codes.
If an emergency power source is required, a
backup power system described below should be
employed.
WARNING
If the AR2000-M is to be connected to a non-
power limited 24 volt dc supply, the National
Electrical Code (NFPA70) requires that those
leads be separated from other classes of
wiring connected to this unit.
B. Backup Power (See figure 3-3).
1. General.
In the backup power system all of the
local power lines are connected in parallel to one
centrally located power source of 24VDC.
2. Advantages of the Backup Power System.
a. The entire system may be indepen-
dent of local line voltage.
b. The entire system can be switched to
an emergency standby power source in the event of a
power failure.
c. The central power system has the
added advantage that an auxiliary power supply,
such as the Federal Model PS600 can be used to
WARNING:
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK,
DO NOT REMOVE COVER OR EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
DRY CONTACT IN (N.O.) DRY CONTACT IN (N.O.)
PRESET 1 PRESET 2 PRESET 3 PRESET 4 PRESET 5 PRESET 6
AUDIO OUT
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5
- + - + - + - + - +
OPTO
COMMON +24V
ALL CALL
PRESET 7 PRESET 8
AUDIO IN FROM EXTERNAL AMP
OR FROM AUDIO OUT 15W
- +
AUDIO OUT
ZONE 6 ZONE 7 ZONE 8
- + - + - + - +
AUDIO OUT
TO BELOW
Figure 3-3.
power the local Audio Router Device. If the PS600 is
used, it is not necessary to switch the power source if
a power failure occurs.
3. Disadvantages of Backup Power System.
remote devices is required. Heavy power lines are
required from that power source to the remote
devices in the system. The size of the power lines is
dependent upon the number of amplifiers and the
total distance of the power loop in order to minimize
the voltage drop while a signal is being routed.
current capacity of the power source and the power
lines that were initially installed.
comply with local electrical codes. Most power cir-
cuits are Class I circuits. Therefore, conduit will
probably be required. Installation costs are higher
than a local power system.
C. AR2000-M System Power Connections.
Installation with the system power on could
cause serious injury or death. Do not perform
any installation or maintenance on this
system when power is on. Ensure that the
power is disconnected before proceeding.
This device is to be installed by a trained
electrician who is thoroughly familiar with
the national electrical code (NFPA 70) and
local codes and will follow the guidelines.
-11-
MONITOR
CONTROL IN
PHONE MICROPHONE
SPEAKER
FROM PRESET
VOLUME VOLUME
VOLUME
AUDIO OUT CH B
CH A
VOLUME VOLUME
VOLUME
AUDIO OUT CH B INPUT CH A INPUT
PHONE LINE
SELECT SELECT SELECT
NUMBER
( ) 1Vrms 1V 1V
rms rms
25Vrms 25V 25V
rms rms
70Vrms 70V 70V
rms rms
AUDIO OUT(15W) CH B INPUT CH A INPUT
CONTROL OUT
- + - + - +
TO ZONE
a. A separate power source for all
b. Future expansion is limited by the
c. Central power installations must
DANGER
WARNING
290A4120-07B