Viking 25AE Technical Practice page 5

C. Contact Closure from Up to 6 Ringing Lines
When a 12V DC relay coil (Radio Shack part: # 275-248, not included) and 220µF capacitor (Radio Shack part: # 272-
1017 or # 272-1029, not included) are connected as shown in the diagram to the right, the relay is activated for the
duration of each ring on 1-6 C.O. lines or analog PABX/KSU stations.
VIKING
PAGING
VOLUME
MIN
TALK BATTERY
WARBLE / CHIME
RINGING LINES
1 - 3
D. Long Runs Between Amplifer and Speakers
Very long runs between the PA-2A and the speakers might require 70V
transformers (Radio Shack part #32-1031 or equivalent).
Note: For additional information on how to minimize loss of audio in long
speaker runs, see Fax Back Document 856.
E. Connecting Multiple PA-2A's
When more than 6 ringing lines are to be monitored or additional amplifiers need to be added, install as shown below,
using the 600 OHM AUDIO OUTPUT connections.
VIKING
RINGING LINES
1 - 3
MODEL PA-2A
©
RINGING
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MAX MIN MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
1 2 3 4 5 6 7 8 9 10
POWER JP1
ALERT TONE
4 - 6 1 2 3 4
25AE Paging Horn
(included)
MODEL PA-2A
©
PAGING RINGING
VOLUME VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MIN MAX MIN MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
1 2 3 4 5 6 7 8 9 10
TALK BATTERY
POWER JP1
ALERT TONE
WARBLE / CHIME
4 - 6 1 2 3 4
8 Ohm 2.5 Watt
(Very Long Run)
Com Com
Radio Shack part #32-1031
VIKING
PAGING
VOLUME
MIN MAX
PAGING - LOUD RINGING
TALK BATTERY
ALERT TONE
WARBLE / CHIME
RINGING LINES
1 - 3 4 - 6
Note: DIP switch 4 must
be in the OFF position.
220µF Capacitor
Radio Shack
Part # 272-1017
or #272-1029
N.O.
N.C.
COM
Relay (Radio Shack
Part # 275-248)
VIKING
©
PAGING
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MIN MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
TALK BATTERY
ALERT TONE
WARBLE / CHIME
RINGING LINES
1 - 3 4 - 6 1 2 3 4
2.5 Watt
Com
MODEL PA-2A
©
RINGING
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MIN MAX
AMPLIFIER SYSTEM
1 2 3 4 5 6 7 8 9 10
POWER JP1
1 2 3 4
MODEL PA-2A
RINGING
VOLUME
MIN MAX
1 2 3 4 5 6 7 8 9 10
POWER JP1
8 Ohm
Com
25AE Paging Horn
(included)