3M 4488 User manual

July 1996
78-8113-4488-2
4488and4588
ProtectedEntranceTerminals
Instructions
UnderwritersLaboratories(UL)Listed
DOCUMENT
OBSOLETE

1
Contents:
1.0 General ......................................................................................................................................................... 1
2.0 Accessories................................................................................................................................................... 2
3.0 Protector Specifications ................................................................................................................................ 2
4.0 Tool Requirements ........................................................................................................................................ 2
5.0 Terminal Locations ........................................................................................................................................ 2
6.0 Terminal Grounding ...................................................................................................................................... 2
7.0 Entrance Cable Preparation and Termination............................................................................................... 3
8.0 Multiple Terminal Installation......................................................................................................................... 4
9.0 Distribution Cable Termination ...................................................................................................................... 5
10.0 Protector Installation and Testing.................................................................................................................. 6
11.0 Protective Cover Installation ......................................................................................................................... 6
4588-100
4588-25 4488-50
913962
e. Strain relief components for entrance cable.
f. An external 3-port ground bar.
g. An internal insulated ground strap.
h. Mounting template and mounting screws (3).
i. Distribution terminal points.
j. Pair count log label.
k. "Quiet Front" Terminal screws.
l. 4327 Pair Test Probe, 4347 Pair Test Clip.
1.01 The terminals contain the following features and
components:
a. A short stub; with one end preconnectorized
to a flame retardant MS2TM modular connector
body/cover, the other end prewired to the
protector receptacle.
Note: The 4488-B, 4488-R, 4588-B and 4588-R
PETs contain a 710-type splice connector
instead of the MS
2
modular connector.
b. A flame retardant modular connector base.
c. A protector receptacle field.
d. An integral splice chamber.
1.0 General
The 3M brand Protected Entrance Terminals (PETs) provide protection and termination of entrance and
distribution cables, are available in 25, 50 and 100 pair count and are Underwriters Laboratories (UL) Listed.
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1.02 Terminal Wiring Schematics:
Protector
Module
From C.O.
Modular
Hardwire
Block
4488 Wiring Schematic
Protector
Module
From C.O.
Self Strip
Block
4588 Wiring Schematic
883706
1.03 Terminal Dimensions Table Depth With
Opt. Cover
5"
(127 mm)
5"
(127 mm)
5"
(127 mm)
Depth
4"
(102 mm)
4"
(102 mm)
4"
(102 mm)
Width
12 1/2"
(318 mm)
12 1/2"
(318 mm)
12 1/2"
(318 mm)
Height
8"
(203 mm)
12"
(305 mm)
22"
(559 mm)
Model
4488-25
4588-25
4488-50
4588-50
4488-100
4588-100
4.0 Tool Requirements
The following tools are required to install the 3M
brand PETs:
Typical Entrance Cable
- Standard Hand Tools
-MS
2
Modular Splicing Rig
-MS
2
4044 Splice Head Frame Adapter
- "B" versions require 710 Connector Splicing Rig
Preconnectorized Entrance Cable or 4187
Extension Stubs
- Standard Hand Tools
-MS
2
Modular Spliing Rig or
- 4255 Hand Tool
6.0 Terminal Grounding
Fasten a #6 AWG wire to the ground bar which is
located on the front of the unit. Connect other end
of ground wire to local ground per company
standards.
Note: Failure to properly bond and ground the
terminal per N.E.C. or local equivalent codes
may render protection arrestors useless.
3.0 Protector Specifications
To maintain UL Listing, only five pin protectors
that are UL Recognized or Listed can be used.
2.0 Accessories
2.01 Protective Covers - These hinged cover kits
provide mechanical protection of the protector
receptacle field, modular hardwire and Self Strip
blocks. A hasp is included if a padlock is
employed for added security. Models available
are: 4372-25; 4372-50; 4372-100; 4373-25;
4373-50; 4373-100.
2.02 4187 Extension Stubs - The extension stub is
a 25' (7.6 m) 26 AWG Alvyn cable,
preconnectorized on one end with a modular
connector base. The stub can be crimped to the
preconnectorized short stub to provide an
extension to the entrance cable. They are
available in 25, 50 and 100-pair sizes.
2.03 4327 SS Pair Probe - The 4327 SS Pair Probe
provides electrical access to a pair of 4320 Self
Strip contacts.
2.04 4347 Pair Test Clip - The 4347 Pair Test Clip
allows for test connections to be made to both Tip
and Ring binding post screw washers
simultaneously on all types of 3M brand Modular
Hardwire Blocks.
5.0 Terminal Locations
5.01 Locate terminal according to standard operating
procedures. Consider the following points as
much as possible:
a. Locate terminal inside building as close as
possible to cable entrance.
b. Locate terminal on a firm mounting surface
where it will be accessible to the technicians at
all times; where it can be reached without a
ladder; and where it will not project in a
hazardous manner.
CAUTION: Avoid locations near flammable
materials, ignitable gases, dust,
moisture, temperature extremes,
moving machinery, electric light and
power circuits, and electrical equipment.
c. Observe caution when exposing terminal to
chemicals in liquid or vapor form as they may
damage the plastic components.
5.02 Openthesplicingchamberbyremovingthetwoscrews
ontheright-handsideofchamberdoor. Reinsert
screwsintappedholestoavoidlosingscrews.
5.03 Pull the preterminated short stub, insulated ground
wire, and accessories out of the splicing chamber.
5.04 Tape the mounting template to the designated
position and mark screw locations (3). Remove
mounting template.
5.05 Mount the terminal in designated position with the
three mounting screws provided.
5.06 Remove jumper wire retaining rings from poly bag
and install in face plate.
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843013
3
843014
7.04 Temporarily tape PST to wall, cable or other
suitable surface to keep the PST out of the way.
7.05 Place both halves of the plastic gland around the
cable jacket with the groove (near the end of the
gland) pointed toward the cable entry port. Snap
the two halves together.
Top Entry
822384
7.03 For top entry, slide 3M brand Pull'N'Shrink
Tubing (PST) over cable sheath with pull tab
facing up. For bottom entry, pull tab must be
facing down when sliding over cable sheath.
843015
Core Wrap
7.06 Align the groove with the cable entry port and slide
the gland into the port. Allow a minimum of 2"
(51 mm) of sheath to extend past the gland into the
splicing chamber. Mark this point for sheath
removal. Remove the gland from the cable entry
port and slide on the cable sheath to where the
PST is located and temporarily tape the gland to
the cable sheath.
Note: PSTmust be positioned a maximum of 1/4" (6 mm)
awayfromterminalside. Ifthisdimensionisnot
achieved,removecollapsedPSTwithsharpknife
and repeat steps 7.03, 7.10 and 7.12. If less than 4"
(102mm) of PSTremains after coreremoval,apply
a new section of PST.
822357
7.12 Slide PST over the gland and position as shown
in drawing, based on size of the terminal. Slowly
unwind loose core tail in a counterclockwise
direction while edging PST toward terminal side
as the core is removed.
PET
Pair Count
25
50
100
Maximum Diameter
1.08" (27 mm)
1.45" (37 mm)
1.80" (46 mm)
MinimumDiameter
.42" (11 mm)
.63" (16 mm)
1.00" (25 mm)
Entrance Cable
7.11 Cable diameters allowed in the area of PST
application are as follows:
If entrance cable diameter is smaller than the
allowed minimum, build up diameter by applying
88T vinyl tape or equivalent.
843016
7.08 Identify and tape ends of binder groups to keep
conductors from unwinding during splicing
operations.
7.09 Bond entrance cable shield to insulated ground
wire per standard procedure.
7.10 Slide the plastic gland toward the cable entry port,
align the groove and insert into the cable port.
7.07 Remove cable sheath leaving a minimum of 1/2"
(13 mm) of core wrap to protect cable from
bonding connector. Conductor length should be
a minimum of 21" (533 mm).
7.0 Entrance Cable Preparation and
Termination
7.01 Extend entrance cable at least 24" (610 mm) past
cable entry slot. Fasten cable to wall 12" - 18"
(305 - 457 mm) above or below terminal
dependent upon cable entrance choice.
7.02 Install the blank plate into the unused cable entry
slot. This must be done to maintain UL Listing.
25-50
pair
100 pair
2"
(51mm)
1/2" (13 mm)
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822358
7.14 Wire Termination:
a. Attach 4041 Splice Head to 4044 Frame
Adapter. Snap adapter legs into diamond-
shaped cutouts in bracket.
Note: Gold adapter must be placed in splice head
before splicing.
812176
b. Place modular connector base onto splicing
head. The cut corner of the base should be on
the left-hand side and rear of the splicing head.
c. Select entrance cable binder group and lay
into base by color code. Check conductor
order with check comb. Select matching
binder group from preconnectorized short
stub. Place body/cover on top of base,
matching the cut corners.
d. Crimp connector using the 4030, 4031 or 4036
crimping unit.
77969
Alignment
Post
Cut
Corner
791476
k.
791475
Wire Guide
Pair Separator
e. To terminate a 4187 Extension Stub onto the
preconnectorized short stub, use either a 4255
Hand Presser or an MS2Splicing Head.
f. To terminate extension stub to preconnectorized
short stub using the 4255 Hand Presser, refer to
the 4255 Hand Presser Instruction Bulletin.
g. To terminate extension stub to preconnectorized
short stub using the MS2Splicing Head, remove
the three screws, color-coded wire guides and
blue pair separator from splicing head.
Note: Gold adapter is not used in this
application.
8.0 Multiple Terminal Installation
8.01 Vertical Stacking
The design of the integral splice chamber and
grooved clamp halves to and from that chamber,
enables up to three PETs of same pair count to
be stacked vertically (dependent on cable
diameter). Vertical stacking is used when the
entrance cable pair count is greater than the
capacity of a single PET or when the installation
design requires that only a portion of entrance
cable pairs be initially terminated.
7.15 After termination is complete, neatly bundle wire
and modular connectors and lay in splice
chamber. Close chamber door and secure
with screws supplied or any #8-32 screw
1/4" - 1/2" (6 mm - 13 mm) long to meet UL
requirements.
7.16 ScotchlokTM UR and UY Connectors may be
substituted for the modular connectors on the
preconnectorized short stub. Use Scotchlok
E-9 Series Tools for proper crimping of
connectors.
832585
913962
i. Crimp connector using the 4030, 4031 or 4036
crimping unit.
j. For wire termination onto the
preconnectorized 710-type connector short
stub, refer to Bell System practice, section
632-205-220.
k. Remove clamp from traverse bar assembly
and mount traverse bar 3" (76 mm) from PET
with two #12 wood screws (not supplied).
4
7.13 After positioning PST as close as possible to
terminal side, continue core removal to collapse
PST over clamp halves. Complete core removal.
h. Place extension stub into splicing head. Place
short stub with corresponding binder group on
top. Use green base retainer posts for
alignment.
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a. Fasten entrance cable to the wall above or
below terminals, dependent upon cable
entrance choice. Attach the PETs to the
mounting surface in a vertical arrangement.
Ensure proper spacing by placing one of the
clamp halves in position between terminals.
843015
b. Remove cable sheath, leaving a minimum of
1/2" (13 mm) of core wrap to protect cable
from bonding connector. Free conductor
length should be equal to or longer than the
vertical length of the mounted PETs.
c. Assemble PST according to Sections 7.03
through 7.13.
f. Install second clamp half over binder groups
by snapping together.
8.02 Horizontal Stacking
When the system design requires a horizontal
arrangement for PETs, a remote splice case is
required to transition the entrance cable into
smaller pair count cable with the use of the 4187
Extension Stubs.
8.03 Combination Stacking
For high pair count installations where both
vertical and horizontal stacking are required,
combining both methods will provide a compact
and neat installation.
822365
822364
d. Identify and tape ends of binder groups to
keep conductors from unwinding during
splicing operations.
e. Lay binder groups into the corresponding
PETs using the clamp halves as an entry
guide.
843017
g. Install the blank plate into the unused cable entry
slot. This must be done to maintain UL Listing.
Note: For wire termination onto preconnectorized
short stub, refer to the MS
2
Splicing
Instruction Bulletin.
h. When the installation design requires that only a
portion of entrance cable pairs be initially
terminated, e.g. 100-pair entrance cable into a
50-pair terminal, the free conductors should be a
minimum of 21" (533 mm) from the farthest PET
cable entry port. Tape ends together and neatly
lay them into the integral splice chamber on top
of the terminated cable pairs.
Note: Whenever a multiple installation is used, all
PETs should be common-grounded with a #6
AWG ground attached to the 3-port ground bar.
c. Route wires from bottom row of binding posts
UP to jumper runway.
d. Lay wires into runway between binding posts
and route wires through wire guides.
5
9.0 Distribution Cable Termination
9.01 4488 Protected Entrance Terminals
Terminate station wire or 22-26 AWG jumper wire
onto Modular Hardwire Block with screwdriver.
a. Split pair (Tip-left, Ring-right) at the assigned
binding post. Strip wire ends.
863408
b. Wrap wires between washers in a clockwise
direction. Single wrap each wire and trim
excess wire.
Note: Excessive tightening of screw may break
wire.
843017
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9.02 4588 Protected Entrance Terminals
Terminate station wire or 22-24 AWG jumper wire
to feeder block.
a. Split pair (Tip-left, Ring-right) at the assigned
cap position. Wire ends should not be
stripped.
b. Form 90°hook on end of jumper wire. Make
sure wires have clean cut ends.
c. Make sure assigned caps are in the
unconnected position with the screwdriver slot
orientated vertically.
d. Insert wire into entry port through the cap until
the wire is visible from the exit port.
e. Insert screwdriver in cap slot and rotate 90°
clockwise until you feel the cap come to rest
against the stop. As the cap rotates, the wire
is simultaneously connected and trimmed off.
Note: Make sure screwdriver blade is fully
inserted into cap slot before rotating.
Connected Cap Position
873557
Unconnected Position
f. Always route jumper wire below the connected cap.
9.03 Testing 4488 Terminals
Note: Binding post screw heads have been
coated with a nonconductive material
resulting in a "Quiet Front" condition. Use
only approved test equipment on block.
a. Connect test set to talk block.
791495
842987
Tip Cap Ring Cap
Ring
Tip
Cap Test Ports
b. Attach 4347 Test Clip onto washers of tip and
ring of one pair.
b. Insert pins in test ports. Depress spring loaded
clamps sufficiently to allow clearance over cap
heads.
842988
6
873557
1/2" - 3/4"
(13 - 19 mm)
2" (51 mm)
Slack Loop
842982
Quiet Front
Coating 832714
c. Test per standard procedure.
9.04 Testing 4588 Terminals
a. Align pair probe.
Note: Pair probe attaches to connected or
unconnected caps.
Note: 4324 Priority Caps prevent unauthorized
(test probe) access.
c. Remove probe by depressing clamps clear of
the cap head and pulling pair probe clear of
the caps.
842989
Release and position fingers behind clamps.
Push pair probe forward until the clamps snap
behind the cap heads.
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b. Installing Hasp:
Note: For models 4372-25, 4372-50 and 4372-100.
Install the hasp on the front panel with the
two #8-32 screws near the protector block.
10.0 Protector Installation and Testing
Fully insert appropriate UL Recognized or Listed
protector into protector receptacle. Refer to
Section 3.0.
Important: All protectors must be fully inserted
during testing.
Standard protector jack field pin
configurations are used with the
central grounding pin serving to
polarize the module. A pair of long
pins on each module connect TIP and
RING to the entrance cable side while
shorter pins connect to the line side.
Detents on the longer pins hold the
protector in place when it is pulled out
to an intermediate position to
disconnect the line. When in this
position, the entrance cable side
continues to be protected.
Important Notice
All statements, technical information and recommendations related to the Seller's products are based on information believed to be reliable,
but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability of the
product for its intended use. The user assumes all risks and liability whatsoever in connection with such use.
Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect
unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all
warranties, expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose
which warranties are hereby expressly disclaimed.
SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT
LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES
SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE.
Telecom Systems Division
6801 River Place Blvd.
Austin, TX 78726-9000
800/426-8688
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© 3M 1996 78-8113-4488-2
c. Installing Hasp:
Note: For models 4373-25, 4373-50 and 4373-100.
Install the hasp on the front face of the integral
splice cover with the two remaining #8-32
screws.
822370
Hasp
Cover
913962
74201
11.0 Protective Cover Installation
Note: Following instructions are not applicable to
R and F models.
11.01The protective covers available as an accessory
should be installed as follows:
a. Remove the four #8-32 screws located on the
left side of the integral splice cover. Align
splice cover screws with hinge holes on the
protective cover and attach.
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