NEC nd-20292 manual Tolerance Measuring, Cpu-E, TP2, TP3, TP4, Strip, Tip

ND-20292

CHAPTER 5

APRIL, 1990

530.2Before Initialization

It is important that the following steps be taken by the installation technician:

1.Cable Connections

All wiring for power supplies, RSG, flat cable

connectors, etc., should be checked for solid

connections.	Refer	to Chapter	2	(Hardware
Installation)	of this	manual	for	connection
instructions.

2.AC/DC Power

Check all power with an AC/DC multimeter (see Table 520-l). It is recommended- that this test be run with only the TSW-E ( 1, CPU-E ( 1 ETUs, and 1, 2, or 3 MMC-E(s) installed in the CCUs, on two, three or four cabinet configurations.

3.Initialization Check

To check if the system is initializing correctly, it is suggested that only Module 1 be powered up with the CPU-E ( 1, TSW-E ( ) ETUs, and one ESI-E ( 1 ETU with terminals installed. After initialization, all the terminals assigned to the ESI-E ( 1 ETU should be able to call each other via intercom. (These stations by default will be assigned station numbers lOO- 103. The first two terminals must be ETE-16D-( ).

530.3System Initialization

After the three steps in 530.2 are completed and checked, the entire system should be initialized.

With the power off, all the interface and option cards can be installed in each module as indicated on the job specification document. It is important to check that the battery switch on the CPU-E ( 1 ETU is turned off and all interface and option ETU switches. are on. At this point the technician can power up the system.

During the power up procedure, each display terminal

will temporarily display INITIALIZE. After the

initialization process, each station display will show

default time and date indication. Example: 12:00 JAN 01 SUN.

It is recommended that a First Initialization (Memory Block 3D-1) be performed from one of the system

programming stations (first two ESI-E ( ) ports) after the power up of the system. Refer to Chapter 3 of this manual.

530.4After Initialization

Before any programming is attempted, the battery switch on the CPU-E ( ) ETU should be turned on. This

will prevent all completed programming from being lost if the system loses power.

Table 500-l

VOLTAGES

TOLERANCE

MEASURING

POINTS

Module

1

CPU-E

( )

TPl

GND

+

5 volts

+ 5

AI

0.25vo1ts

TP2

+5v

- 5 volts

- 5

f

0.25volts

TP3

-5v

-

24 volts

- 24

+

2.0

volts

TP4

-

24V

Modules

2.3

&

4

MMC-E:

TPl

GND

+ 5 volts

+ 5

3~

0.25

volts

TP2

+5v

- 5 volts

- 5

k

0.25

volts

TP3

-5v

- 24 volts

- 24

f

2.0

volts

TP4

-24V

AC Voltage

(117 VAC)

AC TERMINAL

STRIP

Hot to Neutral

117

+

lO%VAC

L to N

Hot

to Conduit

Ground

117

&

lO%VAC

L to G

Neutral

to Conduit

Ground

.05 VAC

(MAX.)

N to G

Ring

Generator

(SLT)

70- 120, VRMS @ 20 Hz*

Across

TIP

& RING of any

ringing

SLT

CO Line

In series with

TIP

side of CO

Off-hook

line

current

25to50mA

line at MDF

Module

1.2,

3 &

4

On the

input

Terminal

Strip

-

(PSE-DD-1)

of PSE-DD-1

-48V

-48 volts

input

-48

+ Bvolts

60 Hz

signals only.

500-2