NEC 120 manual NAP Sheet 32/42 Termination of Cables on MDF, MDF Cross Connection

Models: 120

1 125
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NAP- 200-007

Sheet 32/42

Termination of Cables on MDF

(b)MDF Cross Connection

Notes: 1. The current capacity of the opto-coupler (PN-DK00 card) is 125 mA.

2.The isolator’s relay must be compatible with nominal 24 Volt circuits, and the suppression diode shown is mandatory.

3.The audio path in the isolator must be capacitor-coupled as shown.

4.The Line-fault detection in the C.O.T. must be disabled. Refer to the Command Manual for details.

 

PIM0

 

LTC0

MDF

 

 

 

PN-DK00

 

J

 

 

 

 

 

P

 

 

 

 

 

K0

1

1

 

+

TO CONTROL

 

 

 

 

GND

CIRCUIT

 

 

K1

26

26

 

 

LEN0000

 

 

 

 

K2

2

2

-27V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K3

27

27

 

 

 

 

LT00

K4

3

3

A

 

 

 

 

 

 

TO SPEECH

 

 

 

 

 

 

 

K5

28

28

 

 

CIRCUIT

 

LEN0002

K6

4

4

B

 

 

 

 

 

 

 

 

 

K7

29

29

 

 

 

 

PN-4COT/PN-2COT

 

 

 

 

 

 

 

R0

5

5

 

 

 

 

LEN0004

(No. 0)

30

30

 

 

 

 

 

T0

 

 

PAGING EQUIPMENT

 

R1

6

6

 

 

 

 

 

 

 

LEN0005

(No. 1)

31

31

GND

 

 

 

 

T1

 

 

 

LT01

R2

7

7

-27V

 

CONTROL

SPEAKER

LEN0006

 

CIRCUIT

 

(No. 2)

32

32

 

 

 

 

 

T2

 

 

 

 

 

R3

8

8

A

 

SPEECH

 

LEN0007

(No. 3)

 

 

 

 

 

33

33

B

 

PATH

 

 

T3

 

 

 

 

 

 

 

 

CIRCUIT

 

PZ-PW86

 

 

 

 

 

 

 

-27V

 

 

 

 

 

 

 

GND

 

 

 

 

 

AUSTEL - approved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line Isolation Unit

 

Figure 007-19 MDF Cross Connection for Paging Equipment

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CHAPTER 3

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Revision 1.0.1

Page 109
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NEC 120 manual NAP Sheet 32/42 Termination of Cables on MDF, MDF Cross Connection

120 specifications

The NEC 120 is a well-regarded platform that exemplifies cutting-edge technology and performance in its category. Designed primarily for high-performance computing and telecommunications applications, the NEC 120 has become a staple in many industries, providing robust solutions for demanding workloads.

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