Viking PF-6A Technical Practice Download Page 2

Note:  The unit can also be powered
by 24-48V DC PABX battery supply on
terminals 50 and 25.

Installation

Note:  Loop start and ground start CO lines may be combined on the
PF-6A (see Programming).  When ground start lines are used, pin 50
(V/S) must be connected to a good earth ground.

It is recommended that the first six C.O. lines be interfaced with the
PF-6A as shown in the chart to the right.

If your system has an alarm contact or manual transfer switch, you
must connect it to the red and green wires of the modular jack labeled
EXTERNAL ALARM on the left side of the PF-6A.  This must be a
normally open maintained contact closure.  If normally closed alarm
contacts are used, wire them to break the power to the PF-6A when
they open.

Important:  This unit is not protected against damage from power line surges.  A surge protector is recommended if
operated on 120V AC.

A.  Power Fail Bypass Unit

Circuit 4

Circuit 5

Circuit 6

BK/G
G/BK

BK/BN
BN/BK

BK/S
S/BK

Y/BL
BL/Y

Y/O
O/Y

Y/GN
GN/Y
Y/BN
BN/Y

Y/S
S/Y

V/BL
BL/V

V/O
O/V

V/GN
GN/V
V/BN
BN/V

38
13
39
14
40
15
41
16
42
17
43
18
44
19
45
20
46
21
47
22
48
23
49
24

T4T-IN
T4R-IN

T4T-OUT

T4R-OUT

S4T-IN

S4R-IN

S4T-OUT
S4R-OUT

T5T-IN
T5R-IN

T5T-OUT

T5R-OUT

S5T-IN

S5R-IN

S5T-OUT
S5R-OUT

T6T-IN
T6R-IN

T6T-OUT

T6R-OUT

S6T-IN

S6R-IN

S6T-OUT
S6R-OUT

T1T-IN
T1R-IN

T1T-OUT

T1R-OUT

S1T-IN

S1R-IN

S1T-OUT
S1R-OUT

T2T-IN
T2R-IN

T2T-OUT

T2R-OUT

S2T-IN

S2R-IN

S2T-OUT
S2R-OUT

T3T-IN
T3R-IN

T3T-OUT

T3R-OUT

S3T-IN

S3R-IN

S3T-OUT
S3R-OUT

26

1

27

2

28

3

29

4

30

5

31

6

32

7

33

8

34

9

35
10
36
11
37
12

W/BL
BL/W

W/O
O/W
W/G
G/W

W/BN
BN/W

W/S
S/W

R/BL
BL/R

R/O
O/R
R/G
G/R

R/BN
BN/R

R/S
S/R

BK/BL
BL/BK

BK/O
O/BK

Line

Pins

Color

Trunk/station

Trunk 1 - IN

Trunk 1 - OUT

Station 1 - IN

Station 1 - OUT

Trunk 2 - IN

Trunk 2 - OUT

Station 2 - IN

Station 2 - OUT

Trunk 3 - IN

Trunk 3 - OUT

Station 3 - IN

Station 3 - OUT

Circuit

Circuit 1

Circuit 2

Circuit 3

Station or trunk

control line

GND

-24/48V

50
25

V/S
S/V

Trunk 4 - IN

Trunk 4 - OUT

Station 4 - IN

Station 4 - OUT

Trunk 5 - IN

Trunk 5 - OUT

Station 5 - IN

Station 5 - OUT

Trunk 6 - IN

Trunk 6 - OUT

Station 6 - IN

Station 6 - OUT

Test Button

Dip Switches

RJ21X Female Connector

POWER  and ACTIVE LED - The POWER LED and the ACTIVE LED
will be lit when the PF-6A is in the normal operating mode.  The
ACTIVE LED will go out and the POWER LED will stay lit when the test
button is pressed.

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)

VIKING

©

MODEL PF-6A

VIKING ELECTRONICS, INC.  HUDSON, WI  54016

AUTOMATIC LINE

TRANSFER SWITCH

RJ21X

POWER    ACTIVE

TEST

1    2     3    4

EXTERNAL

ALARM

PABX/KSU

C.O. Line

Normally Open

Maintained

Contact Input

Normally Open

Contact Input

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