Viking PF-6A, Technical Practice, Page: 3 / 4

24
BN/V
49
S6R-OUT
Tip
Programming
Dip Switch ON/OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Description
Normal operation
Bypass mode for testing
Assigns lines 1, 2, 3 to loop start
Assigns lines 1, 2, 3 to ground start
Assigns lines 4, 5, 6 to loop start
Assigns lines 4, 5, 6 to ground start
Not used
Not used
1
2
3
4
B. Ground to Loop Start Converter
The ground start converter in the PF-6A will only work properly when connected in series with
the ground start trunks as shown below.
VIKING
©
MODEL PF-6A
VIKING ELECTRONICS, INC. HUDSON, WI 54016
AUTOMATIC LINE
TRANSFER SWITCH
RJ21X
POWER ACTIVE
TEST
1 2 3 4
EXTERNAL
ALARM
VIKING
©
MODEL PF-6A
VIKING ELECTRONICS, INC. HUDSON, WI 54016
AUTOMATIC LINE
TRANSFER SWITCH
RJ21X
POWER ACTIVE
TEST
1 2 3 4
EXTERNAL
ALARM
RJ21X Male
Connector
(not included)
The DIP switches may be used to program loop start or ground start lines. You may also use DIP switch 1 to toggle
between normal and bypass mode for testing purposes.
Important: Pin 50 must be connected to a
good earth ground for the PF-6A to function
properly with ground start lines.
Pins Color
29
4
33
8
37
12
41
16
45
20
W/BN
BN/W
R/G
G/R
BK/O
O/BK
Y/BL
BL/Y
Y/S
S/Y
V/BN
PABX/KSU
C.O.
Lines
T1T-IN
Line Pins Color
T1R-IN
T2T-IN
T2R-IN
T3T-IN
T3R-IN
T4T-IN
T4R-IN
T5T-IN
T5R-IN
T6T-IN
T6R-IN
26
1
30
5
34
9
38
13
42
17
46
21
GND 50
W/BL
BL/W
W/S
S/W
R/BN
BN/R
BK/G
G/BK
Y/O
O/Y
V/BL
BL/V
V/S
S1T-OUT
Line
S1R-OUT
S2T-OUT
S2R-OUT
S3T-OUT
S3R-OUT
S4T-OUT
S4R-OUT
S5T-OUT
S5R-OUT
S6T-OUT
EARTH GROUND (V/S)
-
Ring
Incoming
Ground Start
Trunks
Tip
Ring
Tip
Ring
Tip
Ring
Tip
Ring
Tip
Ring
Tip
+
-
+
-
+
-
+
-
+
-
+
1
2
3
4
5
6
Ring
Loop Start
Lines Out
Ring
Tip
Ring
Tip
Ring
Tip
Ring
Tip
Ring
Tip
1
2
3
4
5
6
Note: The C.O. lines must be connected in
the correct polarity.
Important: Do N O T
connect the power
adapter when using the
PF-6A in the Ground to
Loop Start application.