Viking pf-6a Service Manual

Telecommunication Peripheral Products

Technical Practice

PF-6A

Power Fail Bypass

or Ground to

Loop Start Converter

March 23, 2000

Power Failure Bypass System

With the PF-6A, you will continue to receive your
calls, during phone system and power outages. The
PF-6A bypass unit connects 6 preassigned single
line station phones directly to the C.O. trunks you
have assigned. A built in ground start converter
permits outbound calls from standard phones.

When the system is restored, you will not lose calls.
Viking’s PF-6A bypass unit will reconnect phones to
their station circuits after they become idle.

The PF-6A can be configured to operate when power is lost or from an opening/closing
of an alarm contact or manual closure.

The PF-6A can also be used to convert six incoming ground start lines to loop start
lines. This accommodates installation of telephony equipment requiring loop start lines
(i.e: key systems, call sequencers, answering machines, voice mail, etc.).

VIKING©

http://www.VikingElectronics.com

[e-mail]

Features Applications

• Transfers six C.O. trunks directly to the
designated analog station phones

• Stackable to increase capacity

• Allows you to receive calls as well as make
calls during power or system failure

• Compatible with loop start lines or 48V ground
start lines

• Prevents busy signals or unanswered calls
during power and system failures

• Converts ground start lines to standard loop
start lines

Sales...(715) 386 - 8861

Made in the U.S.A.

• Automatic ground start converter eliminates
“ground start buttons”

• Power restoration will not interrupt calls in
progress

• Operates on power failure or normally open ­ normally closed alarm contacts

Specifications

Power: 120 V AC/13.8V AC 1.25A, UL listed adapter provided or
24-48V DC, 100mA

Dimensions: 187mm x 127mm x 45mm (7.35” x 5” x 1.75”)
Shipping Weight: .91 kg (2 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-

condensing humidity

Connections: (1) RJ21X, (1) RJ11

Normally Open

Contact Input

Installation

1 2 3 4

TEST

AUTOMATIC LINE

TRANSFER SWITCH

EXTERNAL

ALARM

VIKING©

MODEL PF-6A

RJ21X

Test Button
Dip Switches

POWER ACTIVE

VIKING ELECTRONICS, INC. HUDSON, WI 54016

Note: The unit can also be powered

by 24-48V DC PABX battery supply on
terminals 50 and 25.

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.

RJ21X Female Connector

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

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.

Normally Open

Maintained

Contact Input

PABX/KSUC.O. Line

1 2 3 4

TEST

AUTOMATIC LINE

TRANSFER SWITCH

EXTERNAL

ALARM

VIKING©

MODEL PF-6A

POWER ACTIVE

RJ21X Male

(not included)

RJ21X

VIKING ELECTRONICS, INC. HUDSON, WI 54016

Connector

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.

Circuit

Circuit 1

Circuit 2

Circuit 3

Circuit 4

Circuit 5

Circuit 6

Station or trunk

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
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

control line

Line Pins ColorTrunk/station

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

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

GND

-24/48V5025

26

W/BL

1

BL/W

27

W/O

2

O/W

28

W/G

3

G/W

29

W/BN

4

BN/W

30

W/S

5

S/W

31

R/BL

6

BL/R

32

R/O

7

O/R

33

R/G

8

G/R

34

R/BN

9

BN/R

35

R/S

10

S/R

36

BK/BL

11

BL/BK

37

BK/O

12

O/BK

38

BK/G

13

G/BK

39

BK/BN

14

BN/BK

40

BK/S

15

S/BK

41

Y/BL

16

BL/Y

42

Y/O

17

O/Y

43

Y/GN

18

GN/Y

44

Y/BN

19

BN/Y

45

Y/S

20

S/Y

46

V/BL

21

BL/V

47

V/O

22

O/V

48

V/GN

23

GN/V

49

V/BN

24

BN/V

V/S
S/V