CNI QCM486 Manuale utente

QCM486 Miniature Protector Connector (MPC)

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Contents

1. General ........................................................ 1

2. Description ................................................... 1

3. Precautions...................................................2

4. Components ................................................. 3

5. Protectors.....................................................3

6. Mounting Bar Kits..........................................4

7. Recommended Distributing

Frame Capacities............................................... 7

8. Installing Stubbed Connectors

in Locations With Cable Vaults. .......................... 8

9. Installing Stubbed Connectors in

Locations Without Cable Vaults ......................... 8

10. Installing Dual Stub Connector in

Remote Frames .............................................. 10

11. Installing Stubless Connectors......................9

12. Testing ......................................................11

13. Cross Connect Wire ................................... 12

1. General

1.1 This document describes the installation

and testing of the QCM486 Miniature

Protector Connector manufactured

1.2 This document is being reissued since Acquisition by

Bourns, Inc.

1.3 Contact your customer service

representative to purchase accessories that are

sold separately or to request installation information, if

necessary.

2. Description

2.1 The QCM486 Miniature Protector

Connector (MPC) (Figure 1) is a 100-pair

connector for terminating and protecting cable

pairs in Central Offices (CO) and customer

premises.

2.2 The MPC provides:

•Voltage protection or voltage/current

protection on cable pairs

•Direct-feed facility between outside-plant

cable pairs and CO when electrical

protection is not required.

•Disconnection between outside-plant cable

pairs and CO or customer premises pairs.

•Cross-connection between outside-plant

cable pairs and CO or customer premises

connecting block.

•Testing access to outside-plant cable pairs.

•Testing access to CO or customer premises

pairs.

•Guards and markers for identifying and

protecting special service circuits.

2.3 The MPC can be mounted on

Conventional Distributing Frames, Compact

Distributing Frames, or Customer Premises

Distributing Frames.

04012022

QCM486 Miniature Protector Connector (MPC)

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2.4 The MPC is available stubless or equipped

with a 100-pair (top or bottom entry) stub.

Available stub lengths are 9.1, 15.2, or 30.5 mm

(30, 50 or 100 ft.) with 22 or 24-gauge

conductors. The dimensions and weights of the

MPC are shown in Table 1.

3. Precautions

3.1 The MPC is shipped in protective

packing with protector modules installed in the

detent position. Observe the following

precautions when storing, handling and

installing the unit:

•Store in a dry location. Do not leave on

loading docks or locations exposed to

weather or where temperatures are higher

than +45°C (+113°F).

•If the MPC has been exposed to

temperatures below -30°C ( - 22°F), allow

to warm to room temperature before

installing to avoid damage to cable stub.

•When unpacking, open the top of the

container marked THIS SURFACE UP AT

ALL TIMES.

•Do not remove protective packing material

around the MPC until the stub cable has

been placed through the cable vault

entrance, and the MPC is ready to be

mounted on the distributing frame.

•Do not bend the stub cable to a radius of

less than 150 mm (6 in.).

•To avoid damage to the MPC from rolling

ladders on the conventional MDF, the

ladder guard rail projection must be 650

mm (25.5 in.).

•Compact DSPF/PDF clearances for rolling

ladder and the MPC is approximately 51

mm (2 in.).

NOTE:

If this measurement is not met, contact

the Central Office Engineering Group for correction

prior to mounting MPC units.

3.2 Where distributing frame verticals are not

drilled to fit MPC 140 mm (5.5 in.) mounting

centers, replace verticals, drill as required, or

install a mounting bar kit.

3.3 The following precautions are included

per requirement of the Underwriters

Laboratories Inc.®:

•National Electrical Code Requirements:

The installation of this product, including

any field-installed components, shall meet

all applicable federal, state, and local laws

and regulations and, if unrestricted, comply

with articles 800, 820 and all other

appropriate requirements of the National

Electrical Code, ANSI/NFPA 70.

•Only products marked “for indoor or

outdoor use” or “for outdoor use” are

suitable for outdoor use. Products without

this marking are not suitable for outdoor use

and are implied to be suitable for indoor use

only.

•The use of a fuse link for each and every

line is recommended when connecting any

equipment to the telephone circuit. For

typical applications, a one-foot or longer

length fuse link of at least two wire sizes

smaller than the typical wire gauge in use

within the circuit is recommended.

•It is recommended that any components

added to this product be both listed for the

purpose and compatible.

•Risk of electric shock — Protector is not to

be used without the arrester assembly

installed.

QCM486 Miniature Protector Connector (MPC)

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4. Components

5. Protectors

5.1 Each protector unit (Figure 3) has male

pins on the base, a finger grip for removal, and

a detent latch. Protector units provide the

following connections and terminations:

•Tip (T)- and Ring (R)-conductor

terminations for one outside plant cable pair

and parallel connection to equivalent test

field pair through the two long pins on the

base.

• T- and R-conductor connections to one CO

cross-connect terminal pair through the two

short pins on the base.

•Ground connection to MPC housing

through spring contacts on the side of

protector units.

QCM486 Miniature Protector Connector (MPC)

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5.2 The detent latch on the protector unit

engages the cut-out in the protector housing

when the unit is in the partially withdrawn

detent position. To insert the unit completely

or to remove it, depress the detent latch.

5.3 The protector terminal field is a plastic

block mounted at the back of the protector

housing. The block is equipped with one

hundred 4-terminal receptacles to accept a

hundred protector units. Each 4-terminal

receptacle consists of two long pin terminals

and two short pin terminals.

5.4 The two long-pin terminals engage female

contacts on the protector side. Wire-wrap

terminals on the other side terminate the Tip

(T)- and Ring (R)- conductors of one outside plant

cable pair. The long pins are also wired to

corresponding test-terminals on the test field.

5.5 The two short-pin terminals engage

female contacts on the protector side. Wire wrap

terminals on the other side terminate the

Tip and Ring of one CO pair through internal

wiring from the corresponding pair of contacts

on the cross-connect field.

5.6 When the protector unit is withdrawn to

the detent position the short pins on the

protector unit break contact with the receptacle

pins, opening the circuit between CO and

outside-plant cable pairs. The long pins on the

protector unit maintain contact with the

receptacle pins, maintaining protection on the

outside-plant cable pair.

5.7 The QTH52A (single unit) and QTHS2B

(5 unit) removal tools are intended for use with

protector units equipped with QCF4ASSM/SSP

guards.

5.8 To remove the guard from a protector

unit, hold the tool vertically, and engage the

right jaw of the tool with the right side of the

guard flange. Offset the left jaw behind the

guard, squeeze, rotate counterclockwise, and

pull guard from protector unit.

5.9 To remove the protector unit, engage the

unit handle with the right jaw of the tool, offset

the left jaw on the unit latch, squeeze, rotate

counterclockwise and pull.

6. Mounting Bar Kit

QCM486 Miniature Protector Connector (MPC)

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6.1 Mounting bar kits are for use on

distributing frame verticals which are not

drilled to fit the MPC 5.5-in. mounting

centers. To select appropriate kit (refer to

Table 2).

6.2 Before installing, make sure you have the

right mounting bar kit for installation on the

distributing frame.

6.3 If the frame vertical is 4.8 mm (3/16 in.)

thick, place the spacers provided between frame

vertical and mounting bars.

6.4 Place a 1.2 mm (4 ft.) mounting bar

against the right side of the vertical, with the

short bend of the mounting bar located to the

left (Figure 5).

6.5 Fasten mounting bar to vertical using the

screws provided. Leave 75 mm (3 in.) between

the mounting bar and the guard rail at the

bottom of the frame. Insert screws from right,

through the 50-mm (2-in.) slots in the

mounting bar, into the existing holes in

verticals. Position screws at top, center and

bottom of bar.

6.6 Fasten the connector to the mounting bar

with the screws, nuts and bolts provided. Insert

screws from left into the 12.7-mm (0.5-in.) slots

in the mounting bar, and assemble lock washers

and nuts loosely.

NOTE:

For distance of first MPC from floor or

ladder guard rail, see Figure 7 and Table 3.

QCM486 Miniature Protector Connector (MPC)

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6.7

Repeating Steps 3, 4, and 5, mount the

remaining bars immediately above the first.

NOTE:

Begin with 1.2-mm (4-ft.) bars, if

provided, and proceed to 0.92-mm (3-ft.) bar(s).

NOTE:

The top bar and spacer may be shortened

for nonstandard height frame. Cut as required,

remove burrs, and paint end.

6.8 Connect a ground strap between the top

mounting slot of each mounting bar and the

bottom mounting slot of the bar above

(Figure 5).

6.9 Using flexible ground strap and clamp

plate, connect the mounting bar kit to the

ground bar of frame (Figure 6).

NOTE:

When free mounting holes are not available

on the ground bar, use the existing nut and bolt on the

bar to mount the other end of the flexible ground

strap.

QCM486 Miniature Protector Connector (MPC)

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7. Recommended Distributing Frame Capacities

QCM486 Miniature Protector Connector (MPC)

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8. Installing Stubbed Connectors in

Locations With Cable Vaults

8.1 Open cable vault entrance hole(s) or

ferrule(s) using local instructions and

procedures.

8.2 Remove the MPC from its shipping

container (keep the protective packing around

the connector assembly).

8.3 Mark the stub cable with its identification

number and the pair count of the outside-plant

cable to which the stub is to be spliced.

8.4 Pass the stub cable through the entrance

hole into the cable vault. Remove any twists in

the cable.

8.5 Screw the two mounting screws supplied

with the MPC part way into the mounting holes

on the distributing frame vertical. Insert screws

from left side of vertical.

8.6 Hang the MPC by its mounting bracket

slots on the two screws in the frame vertical

(Figures 8 and 9).

NOTE:

Mount the first MPC on the appropriate

frame verticals:

•Compact (PDF) 356 mm (14 in.) from floor or

203 mm (8 in.) from ladder guard rail

(Figure 7).

•Conventional (PDF) 305 mm (12 in.) from

floor (Figure 7).

NOTE:

Position the MPC so that the plastic stud

on the top of the connector immediately below

engages the slot on the bottom of the connector being

mounted.

8.7 Tighten the mounting screws to secure

MPC to vertical.

8.8 Dress the stub down the frame and into

the cable vault.

8.9 Secure the stub(s) to the vertical with

cable retaining brackets.

8.10 Close cable vault entrance hole or ferrule

according to local procedures.

8.11 Mark the designation strip with cable

number and pair count of the MPC cable being

terminated.

NOTE:

An adhesive designation number card is

supplied with each MPC.

8.12 Test the protector modules.

8.13 Splice the stub to the outside-plant cable

using standard splicing procedures.

QCM486 Miniature Protector Connector (MPC)

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9. Installing Stubbed Connectors in

Locations Without Cable Vaults

9.1 Remove the MPC from its shipping

container (keep protective material around the

connector assembly).

9.2 Mark the stub cable with the identification

number and pair count of the cable to which the

stub is to be spliced.

9.3 Determine the splice location and whether

the stub entrance is from the top or bottom of

the distributing frame.

9.4 Screw the two mounting screws supplied

with the MPC part way into the mounting holes

at the required position on the left side of the

distributing frame vertical.

9.5 Run the stub cable up or down the

distributing frame as required to the splice

location.

9.6 Hang the MPC by its mounting bracket

slots on the two screws in the frame vertical

(Figures 8 and 9).

NOTE:

Mount the first MPC on the appropriate

frame verticals:

•Compact (PDF) 356 mm (14 in.) from floor or

203 mm (8 in.) from ladder guard rail

(Figure 7).

•Conventional (PDF) 305 mm (12 in.) from

floor (Figure 7).

NOTE:

Position the MPC so that the plastic stud

on the top of the connector immediately below

engages the slot on the bottom of the connector being

mounted.

9.7 Tighten screws to secure the MPC to the

vertical.

9.8 Dress the stub up or down the distributing

frame.

9.9 Mark the MPC designation strip with the

number and pair-count of the cable being

terminated.

NOTE:

An adhesive designation number card is

supplied with each MPC.

9.10 Test the protector modules.

9.11 Splice the stub to the main cable, as

required by the job specifications, using

standard splicing procedures for the type of

cable involved.

NOTE:

•Insulate the DSPF upright with 18 mm

(.75 in.) diameter split fiber tubing for

protection of cable leads.

•The cross-aisle cable (26 gauge) must be

butted 25 mm (1 in.) above or below the

associated connector, depending on the

frame entrance, and fanned out to the

terminals.

•The quick-clip terminal connections

must be made with a QTH38-type tool,

leaving 13 mm (0.5 in.) of dressed slack.

QCM486 Miniature Protector Connector (MPC)

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10. Installing Dual Stub Connector in

Remote Frames

10.1 Remove the MPC from its shipping

container (keep protective material around the

connector assembly).

10.2 Mark the stubs cable with the

identification number and pair count of the

cable to which the stubs are to be placed.

10.3 Determine the splice location and whether

the stub entrance is from the top of the bottom

of the distribution frame.

10.4 Screw the two mounting screws supplied

with the MPC part way into the mounting holes

at the required position

on the left side of the

distributing frame vertical

10.5 Run the one of the stub cable up/down the

distributing frame as required to the splice

location and then the second stub.

10.6

Hang the MPC by its mounting bracket

slots on the two screws in the frame vertical.

NOTE:

Position the MPC so that the plastic stud

on the top of the connector immediately below

engages the slot on the bottom of the connector being

mounted.

10.7 Tighten screws to secure MPC to the

vertical.

10.8 Dress one of the stubs to the distribution

frame, and then dress the second stub.

10.9 Mark the MPC designation strip with the

number and pair-count of the cable being

terminated.

10.10 Test the protector modules.

NOTE:

Splice stubs to the main cable, as required

by the job specification, using standard splicing

procedures for the type of cable involved.

11. Installing Stubless Connector

NOTE:

Before proceeding with installation, divide

the cable to be terminated into 100-pair binders for

each connector location.

NOTE:

A mounting adapter (P0566899) can be

used to mount the MPC during installation for

easier access to work areas. This section will describe

the procedure when using this bracket.

11.1 Pull the 100-pair binders up the frame

until all slack is removed. Binders must extend

at least 625 mm (2 ft.) above the MPC position.

11.2 Tie the binder to the transverse arm below

the MPC position.

11.3 Separate the 100-pair binder into four

25-pair groups, and tag each group with its

applicable pair count: 1-25, 26-50, 51-75 or

76-100.

11.4 Secure the mounting adapter on the frame

vertical with two screws.

Indice

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