Viking PA-250 Product Manual page 8

H. Speakers
Step 1 Connect 70V speakers across the 70V SPEAKERS terminals (pins 19 & 22).
If using 25V speakers, connect half of them across the 25V SPEAKERS terminals (pins 19 & 20), and the other half
Step 2
across the 25V SPEAKERS terminals (pins 21 & 22), so that the power load is balanced between the two outputs.
Check the power tap of each speaker connected, and be sure the sum of all the speakers connected does not
exceed 250 Watts. For example, if there are 40 speakers, and all are wired to their 5 Watt taps, the amplifier is
driving a 200 Watt load. Since the PA-250 is capable of driving a 250 Watt load, additional speakers could be added,
Step 3 or some of the existing speakers could be tapped at a higher wattage setting to play louder. If the total speaker load
goes "over budget" (greater than 250 Watt load), either remove some speakers, or use lower power taps to get
down to a 250 Watt load. If more than 250 Watt load is needed, a PP-250 can be added as shown in Installation,
section D.
Up to
250W
Load
NOTE: For wire run lengths up to 500 feet, use #18 gauge or larger speaker cables. For wire run lengths up to 1000 feet, use #16
gauge or larger speaker cables. For wire run lengths up to 1500 feet, use #14 gauge or larger speaker cables, etc.
I. AC Power Input
Connect both IEC C7 plugs from the supplied "Y" AC power cord into the two AC POWER INPUTS on the back of
Step 1
the PA-250.
Once all other connections are made, power up the PA-250 by plugging the AC power plug end of the supplied "Y"
Step 2
AC power cord into a power outlet.
MICROPHONE
FXO (LOOP START)
FXS (RING TRIP)
PAGE PORT
1 2 3 4
PROG
+
Surge
Protector
(not included)
MICROPHONE
FXO (LOOP START)
FXS (RING TRIP)
PAGE PORT
1 2 3 4
PROG
+
70V Paging Speakers
25AE-70V Paging Horns shown
(not included, see DOD 471)
PA-250 Back Panel
LOUD
RING
5 6 7 8 9 10 11 12 13 14 15 16 17 18
+ + +
115 VAC
PA-250 Back Panel
5 6 7 8 9 10 11 12
+ + +
30AE-70V Speakers shown
(not included, see DOD 473)
VIKING
70V
MODEL PA-250
250 WATT TELECOM PAGING AMPLIFIER
19 20 21 22
+
SPEAKERS
IMPORTANT: Electronic devices
are susceptible to lightning and
power station electrical surges from both
the AC outlet and the telephone line. It is
recommended that a surge protector be
installed to protect against such surges.
"Y" Power Cord
(included)
8
LOUD
RING
70V
13 14 15 16 17 18 19 20 21 22
+
SPEAKERS
AC POWER INPUT
(BOTH REQUIRED)