4
C. Contact Closure From Up to 6 Ringing Lines
When a 12V DC relay coil (Radio Shack part: # 2750043, or Digi-Key part: # Z1632-ND not included) is connected
as shown in the diagram below, the relay is activated for the duration of each ring on 1-6 C.O. lines or analog
PABX/KSU stations.
Relay (Radio Shack
Part # 2750043
or Digi-Key Part #
Z1632-ND)
Note:
COIL VOLTAGE: 12VDC
MAX COIL CURRENT: 100mA
N.O.
N.C.
COM
PWR
RELAY
CONTROL
VIKING©
VIKING
ELECTRONICS
HUDSON,
WI
54016
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
POWER 13.8V AC
MODEL PA-2A
PAGING
VOLUME
RINGING
VOLUME
MIN
MAX
MIN
MAX
12345678910
NIGHT
TRANSFER
PAGING
HORN
600 OHM
AUDIO OUT
TRUNK OR
PAGING PORT
LOUD RING
TRIGGER INPUT
1 - 3
4 - 6
RINGING LINES
WARBLE / CHIME
1 2 3 4 5
AUDIO LOADING
TALK BATTERY
ALERT TONE
25AE Paging Horn
(included)
(Very Long Run)
Secondary SecondaryPrimary Primary
Two 70V Transformers from Parts Express part # 300-040
Parts-Express.com or 1-800-338-0531
2.5 Watt(Brown)
Com(Black)
2.5 Watt(Brown)
Com(Black)
8 Ohm(Grey)
Com(Black)
8 Ohm(Grey)
Com(Black)
PWR
VIKING©
VIKING
ELECTRONICS
HUDSON,
WI
54016
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
POWER 13.8V AC
MODEL PA-2A
PAGING
VOLUME
RINGING
VOLUME
MIN
MAX
MIN
MAX
12345678910
NIGHT
TRANSFER
PAGING
HORN
600 OHM
AUDIO OUT
TRUNK OR
PAGING PORT
LOUD RING
TRIGGER INPUT
1 - 3
4 - 6
RINGING LINES
WARBLE / CHIME
1 2 3 4 5
AUDIO LOADING
TALK BATTERY
ALERT TONE
Very long runs between the PA-2A and the speakers might require
two 70V transformers (Parts Express 1-800-338-0531, part # 300-
040 or equivalent).
Note: For additional information on how to minimize loss of audio
in long speaker runs, see DOD 856.
D. Long Runs Between Amplifier and Speakers
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.
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