Westell Issue 2 Series User manual

Equipment Issue 2
030‐101665 Rev. C, May 2012
Section DTW‐A52‐802‐202
R
ECopyright 2012 Westell, Inc. All rights reserved. CLEI is a trademark of Telcordia Technologies.
Westellrand 200 MECHANICSrare registered trademarks of Westell, Inc. Page 1 of 6
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DTWA528‐02 Issue 2 Series of 2‐Slot Universal Data Mountings
CONTENTS PAGE #
1. GENERAL 1....................................
2. OPTIONS & FEATURES 2.......................
3. INSTALLATION 3..............................
4. TROUBLESHOOTING 6........................
5. CUSTOMER & TECHNICAL SERVICES 6........
6. WARRANTY & REPAIRS 6.......................
7. SPECIFICATIONS 6............................
1. GENERAL
1.1 Document Purpose
This document describes the Westell DTWA528‐02 Issue 2 se
ries of 2‐Slot, Universal, Data Mounting Assemblies. A typical
assembly is shown in Figure 1.
‐ NOTE ‐
Hereafter, the DTWA528‐02 Issue 2 series may be referred to as
the “528‐02I2” or “assembly.” Specific model or list numbers will
be referenced where differences apply.
1.2 Document Status
Whenever this practice is updated, the reason will be stated in
this paragraph. This practice replaces practice 030‐101584 for
the models listed in Table 6. Revision B updates Table 6, the
first paragraph in Part 3, and Paragraph 3.6. Revision C updates
the boxed Precautionary Statement in Part 3, Table 4, the
second sentence in Part 3, and Paragraphs 2.4 and 3.6.
1.3 Product Purpose and Application
The 528‐02I2 is a universal, data wall‐mount assembly which
has two slots or circuits to terminate either one 400‐mechanics‐
type module or two 200 MECHANICSr‐type modules (high‐
density). The assembly accepts modules designed for the pur
poses listed below (also see Figure 2 for typical applications).
SNetwork Interface Units (NIUs) in 1.544 Mb/s Hi‐Cap
digital (T1) and High‐bit‐rate Digital Subscriber Line
(HDSL) applications
SDSTs in Analog Data Service applications
SDDIs in Digital Data Service applications
SAny combination of the above applications
All Network Interface (Telco) connections are made at screw ter
minal blocks (or wirewrap pin headers for the List 4‐9 option).
Customer Interface (Cl) connections are made at either RJ48C/S
modular jacks or at screw terminal blocks (no screw terminals for
the List 4‐9 option). A locking metallic cover protects the Custom
er and Telco connections with the List 4‐9 option.
Figure 1. Isometric View of DTWA528‐02I2
1.4 Product Mounting
The 528‐02I2 is typically wall‐mounted at the customer prem
ises on the network side of the point of demarcation. Holes for
mounting screws are provided in the bottom of the assembly.
The 528‐02I2 also may be set on a desk, shelf, or tabletop for
horizontal mounting. The 528‐02I2 also can be installed in 19‐inch
or 23‐inch equipment racks with Westell's MBA1923‐2 mounting
bracket kit.
1.5 Product Features
Features of the 528‐02I2 are as follows:
SSmall footprint
SAccepts either one 400‐type module or up to two 200
MECHANICS‐type modules for use in Hi‐Cap/T1/Digi
tal/Analog applications
SNetwork connections made to screw terminal blocks (or
to wirewrap pins for the List L4‐9 option)
SCustomer connections to screw terminal blocks or to
RJ48C/S jacks (no screw terminals blocks with L4‐9
option)
SPower/ground connections made to screw terminal block
S2 switches to select either RJ48C or RJ48S jack
applications
STinted, see‐through, front window allows visual monitor
ing of plug‐in module's status LEDs plus easy module
access
SBuilt‐in swing‐out bracket allows (lockable, List 4 option)
cover to swing‐out to provide easy access to all internal
components and doubles as a 2‐slot module housing
SIn closed position, assembly allows convenient rear access
to customer RJ48C/S jacks while protecting the Telco and
customer terminal block connections
SCompact, versatile, wall‐mountable or tabletop‐mount
able metallic case

Section DTW‐A52‐802‐202 030‐101665 Rev. C R
21205I2RC
Figure 2. 528‐02I2 Applications
Central Office
Test
Equipment
IOR
ILR ILR
Telco #1
TB1
NIU
#1
CPE#1
TB2 / J1 CPE
Figure 2a. 528‐02I2 Configured as a Single NIU Mounting, Using a Standard 400‐ or 200‐MECHANICS NIU
Central Office
Test
Equipment
HTU‐C Telco #2
TB3 HTU‐R CPE#2
TB4 / J2 CPE
HTU‐C Telco #1
TB1 HTU‐R CPE#1
TB2 / J1 CPE
Figure 2b. 528‐02I2 Configured as a Dual Mounting, Using two HDSL 200‐MECHANICS Units
Central Office
Test
Equipment
Telco #1
TB1
DST
#1
CPE#1
TB2 / J1 CPE
Figure 2c. 528‐02I2 Configured as a Single DST or DDI Mounting, Using a Standard 400‐ or 200‐MECHANICS DST or DDI Modules
ISQ
RJ48C
RJ48C
RJ48C
RJ48S
IOR = Intelligent Office RepeaterILR = Intelligent Line Repeater NIU = Network Interface UnitISQ = Intelligent ETOCPE = Cust. Premises Equipment
528‐02I2
528‐02I2
528‐02I2
Cross
Connect
Cross
Connect
Cross
Connect
SWiring diagram provided on the inside cover
SChassis ground lug
SCable ties (provided)
SNEBS Level 3 certified
SUL 60950 listed by an NRTL
SCertified to CAN/CSA‐C22.2 No. 60950
2. OPTIONS & FEATURES
The 528‐02I2 contains various features, switches, and terminal
blocks, as shown in Figure 3 and Figure 4 and described below,
to option the unit for proper operation.
‐ LIST 4‐9 WIREWRAP PIN NOTE ‐
The 528‐02I2 List 4‐9 option provides wirewrap pin connectors inside the
unit for Network connections, instead of screw terminals. Substitute the
term “wirewrap pin header” for “screw terminal block” when referencing
the 528‐02I2, List 4‐9.
2.1 TB1 and TB3 ‐ Telco/Network Connections
TB1 and TB3 are 4‐position screw terminal blocks for terminat
ing the Telco/Network connections. The four positions are T, R,
T1 and R1, as shown in Table 2. TB1 is used to interface with cir
cuit/module #1 and TB3 is used to interface with
circuit/module #2. If a 400‐type module (twice the width of 200
MECHANICSr‐type modules) is used, it is inserted into slot/
circuit #1 (top slot when assembly is in the closed position) and
interfaces with TB1.
2.2 TB2 and TB4, or J1 and J2 RJ48C/S Jacks ‐
Customer Premises Equipment Connections
Customer Premises Equipment (CPE) connections to the as
sembly can be made to the 4‐position screw terminal blocks TB2
and TB4 (see Table 3) or to jacks J1 and J2 (either RJ48C or
RJ48S‐type modular jacks). Use Switches S1 and S2 to select
the correct configuration, either RJ48C or RJ48S.
S1/S2 Position Application Type
RJ48C T1, Hi‐Cap, NIU, HDSL
RJ48S Analog Data Services, DST Module, Digital
Data Service, DDI Module, IDSL (ISDN DSL)
Table 1. S1/S2 Positions for Typical Applications/Modules
2.3 S1 and S2 Slide Switches
The 528‐02I2 contains two slide switches, S1 and S2, to provision
the J1 and J2 customer RJ48 jacks for use in an RJ48C or an
RJ48S configuration. If the customer application requires
RJ48C jacks, set S1 and S2 to the RJ48C position. If the customer
application requires RJ48S jacks, set S1 and S2 to the RJ48S
position. If a 400‐type module (twice the width of 200 MECH
ANICSrmodule) is used in the assembly, it is inserted into the
top slot (when in the closed position) and interfaces with only J1
and S1.
2.4 TB5 ‐ Power and Ground Connections
TB5 is a 4‐position screw terminal block for power and ground
connections to the assembly. The four positions are +PWR,
FRAME GND, CIRCUIT GND and ‐PWR, as listed in Table 4.
The +PWR position is used to connect the positive terminal
from a Westell A90‐204100 power supply or an equivalent pow
er supply. FRAME GND is available as an option to connect to

Section DTW‐A52‐802‐202
030‐101665 Rev. C
R
3
1205I2RC
Wall-Mount Keyhole
Customer Side
Figure 3. Top View of 528‐02I2 Interior (Cover Open for Visual Clarity), Typical Wall‐Mounted Position
Terminal Block*
Network Side
Terminal Block*
(Total of 4)
* List option 4-9 contains
wirewrap pin headers
instead of screw
terminals.
Shorting Bar/
Ground Jumper
RJ48C/S Switch
Power/Ground
Terminal Block
RJ48C/S Switch
Ckt 1
Ckt 2
Figure 4. 528‐02I2 Interior, Cover Open, Typical Table
top Mount Position
Hinged Cover,
Access
Card Guides
2 56‐pin Card
See‐through
Switch, CKT2
For Modules
RJ Jack,
Accessible
Rear‐
Customer
Network
Power/Ground
Terminal Strip
S2, JR48C/S
Terminal Block*
Edge Connectors
J2,
Ribbon Cable
RJ48S
RJ48C
CKT 2
Customer
Terminal Block*
Switch, CKT1
S1, RJ48C/S
RJ48S
RJ48C
CKT 1
Module
Opens For
To Wiring
Wiring Label
Window
* The List 4‐9 option contains wirewrap pins instead of screw terminals.
Earth ground as stated in Paragraph 2.5. CIRCUIT GND must
be connected to an earth ground regardless of the power
source. Use 24 AWG or greater insulated wire (see Figure 7).
The ‐PWR position is used to connect the negative terminal
from the power supply.
2.5 Frame Ground Connections
The metal housing can be connected to earth ground by using
one of the methods below. On some units, this optional strap is
provided in the parts bag, and on the DTMA528‐02I2L4 it is
factory installed.
SExterior Frame Ground Lug on Rear of Assembly
(Preferred Method). A frame ground lug, labeled FRAME
GND, is provided on the rear of the metal housing. This
lug should be used to connect the metal housing to earth
ground.
SInterior TB5 Frame Ground Screw Terminal (Inside
Assembly). A frame ground screw terminal, labeled TB5,
located inside the assembly can be used as an optional
method for earth grounding the metal housing (Figure 3
and Figure 8) when local power is supplied.
SOptional Interior TB5 Removable Ground Strap. The
528‐02I2 features a factory‐assembled, pre‐installed,
ground strap for applications requiring frame ground to
be connected to circuit ground. The strap is connected
across TB5's FRAME GND and CIRCUIT GND termi
nals. On some units, this optional strap is provided, but
not factory‐installed.
3. INSTALLATION
The assembly should be installed by authorized, trained person
nel only. This assembly is for use with NEBS‐certified 200
MECHANICSror 400‐type cards. Installation consists of in
specting the assembly for damage, selecting the mounting site or
location, gathering all necessary tools and hardware, mounting

Section DTW‐A52‐802‐202 030‐101665 Rev. C R
41205I2RC
Figure 5. Rear View of 528‐02I2
RJ48C/S
J1 J2
Ground Lug
Lock
Cable
Access Hole
Connector RJ48C/S
Connector
R
the assembly, making all grounding and power connections, per
forming the installer connections for network and customer
wiring and installing the plug‐in module(s) into the assembly.
‐ INSPECTION NOTE ‐
Visually inspect the equipment for signs of damage at the time of delivery.
If the equipment has been damaged in transit, immediately report the ex
tent of the damage to the transportation company and to Westell (see Part
5 for telephone number).
CAUTION ‐ STATIC‐SENSITIVE
This product and the plug‐in product installed inside the assembly
may contain static‐sensitive components! Proper electrostatic
discharge procedures must be followed to maintain personal and
equipment safety. Do not store units near magnetic, electromagnetic
or electrostatic fields.
‐ PRECAUTIONARY STATEMENT ‐
Never install telephone wiring during a lightning storm.
Never install telephone jacks in wet locations unless the jack is
specifically designed for wet locations.
Never touch uninsulated telephone wires/terminals unless the
telephone line is disconnected at the network interface.
Use caution when installing or modifying telephone lines.
3.1 Selecting the Mounting Location
The 528‐02I2 should be wall‐mounted in accordance with local
practices. The installation site should provide adequate lighting
and equipment access. The distance from the cable entry point
should be consistent with local installation practices. Allow ade
quate clearance to accommodate the motion required by the
key‐hole slots (¼‐inch) when locating the assembly for installa
tion. Also ensure that adequate clearance is available for
opening the cover/door and for inserting and removing the mod
ule(s), which slide(s) into place inside the cover.
3.2 Gathering the Mounting Tools and Hardware
The tools required to mount the assembly include:
SFlat‐blade screw driver (to adjust the terminal block
screws and to adjust the mounting screws and ground lug)
SWire strippers (for signal, power, and ground wires)
SDrill and drill bits (to drill holes for mounting screws/bolts)
SMounting hardware (four screws or bolts)
SWirewrap tool (optional, for L4‐9 option only)
‐ NOTE ‐
The 528‐02I2 optionally may be set on a table, shelf, or desk.
For desktop installations, four self‐adhesive rubber feet are provided and
are to be installed on the bottom of the assembly to help prevent marring
the desktop surface.
3.3 Mounting the Assembly to a Wall
1. Loosen the top‐cover screw and open the cover.
2. Using the mounting screw keyholes in the assembly's base
plate as a template, carefully lift the assembly to the de
sired mounting position on the wall and mark the four
mounting screw keyhole locations for the assembly (see
Figure 3). The keyholes allow the assembly to be mounted
so the Customer Interface connections may face either
left, right, or down. Set aside the assembly.
3. Drill the four holes in the mounting surface.
4. Insert and drive the mounting screws into their holes in the
wall until they are just shy of the wall (until approximately
¼‐inch protrudes/remains).
5. Lift the assembly, align the keyholes with the protruding
screws in the wall, and hang the assembly from the screws.
6. Finish driving all screws until snug. Do not over‐tighten the
screws.
‐ CAUTION ‐
Never apply power until all installer connections are complete.
‐ GROUNDING NOTE ‐
Always follow the National Electrical Code (NEC) rules, local safety pre
cautions, and standard operating procedures for grounding the equipment
when installing, upgrading, repairing or maintaining equipment. Any in
structions or information contained herein is subordinate to local codes,
operating procedures or practices.
3.4 Connecting Telco/Network Interface Cables
Telco or network interface connections to the assembly are
made to one or both screw terminal blocks, TB1 and TB3, using
shielded twisted pair cable (22‐24 AWG minimum) of a length
consistent with local installation practices. If only one module
is used in the unit, insert it into the top (upper) slot or position
and use TB1 for the network connections. Telco/network con
nection pin numbers are listed in Table 2.
Card Edge Connector Telco TB1/TB3
Position
Function Pin #
Receive from Network 7 T
Receive from Network 13 R
Transmit to Network 41 T1
Transmit to Network 47 R1
Table 2. Telco Interface Connections

Section DTW‐A52‐802‐202
030‐101665 Rev. C
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Figure 6. 528‐02I2 Functional Wiring Diagram
−For 2−Wire HDSL/DS1,
Use Facility T and R
−For 2−Wire HDSL/DS0,
Use Facility T1 and R1
TYPICAL FOR BOTH
CIRCUITS
CPE=Customer Premise Equipment. NET=Network equipment.
Circuit #1 = the top slot when the table‐top mounted unit
is in the closed position (or left‐most slot when wall mounted
unit is open).
FRAME GND
LUG
ESD JACK
(GRN) FRAME GND
(BLK) + PWR
CKT GND
(RED) −PWR
RCV FROM
FAC
XMT TO
FAC
T
R
T1
R1
LED 1
CKT#1
OR
CKT#2
25 17 35 2 11 27
7
13
41
47
5
15
55
49
7
8
2
1
2
1
5
4
5
15
55
49 R
T1
R1
T
RJ48S
RJ48c
J1−J2
OR
XMT TO
CPE
RCV FROM
CPE
CUSTOMER
CONNECTIONS
FACILITY
CONNECTIONS
SWITCH TO CONFIGURE RJ48 JACK FROM ”C” TO ”S”
CKT#1
CKT#2
SLOT POSITIONS
‐ LIST 4‐9 WIREWRAP PIN NOTE ‐
The List 4‐9 option provides wirewrap pin connectors inside the unit for
Network connections, instead of screw terminals. Substitute the term
“wirewrap pin header” for “screw terminal block” when referencing the
528‐02I2, List 4‐9.
Card Edge Connector CI Connector Position/Pin
Function Pin # TB2
TB4
RJ48C
J1/J2
RJ48S
J1/J2
Receive from CPE 55 T 5 2
Receive from CPE 49 R 4 1
Transmit to CPE 5T1 2 7
Transmit to CPE 15 R1 1 8
Table 3. Customer Interface Connections
3.5 Connecting Customer Interface Cables
Make customer connections to J1 and J2 (the RJ48C/S jacks) or
to one or both screw terminal blocks, TB2 and TB4, using
shielded twisted pair cable (22‐24 AWG minimum) of a length
consistent with local installation practices. If only one module is
used in the assembly, insert it into the top (upper) slot or position
and use connector J1 or TB2 for customer connections. See
Table 3 for pin numbers and lead designations.
Function TB5 Terminal Block Label
Negative Power In -PWR
Earth Ground FRAME GROUND*
Ground Return CIRCUIT GND*
Positive Battery In +PWR
*Note: For applications requiring chassis ground to be connected to circuit ground, an optional ground strap
is provided for installation between the FRAME GND and CIRCUIT GND terminals on TB5.
Table 4. Power and Ground Connections
3.6 Connecting Power and Ground
The module(s) in the 528‐02I2 can be span/line powered or local
ly powered with an external NRTL‐Listed Limited Power
FRAME GND
+PWR
‐PWR
FRAME GND
Mounting
CKT GND
+PWR
TB5
Chassis
Ground
Lug To
Lightning
Return
To Ground Window (e.g., cold water pipe)
Mounting
‐PWR
CKT GND
TB5
Chassis
Ground
Lug
To Lightning
Return Ground
To Ground Window (e.g., cold water pipe)
-
+
GND
Local
Power Supply
Figure 7. Grounding with Span Power
Figure 8. Grounding with Local Power
Optional*
Ground
Strap
Optional*
Ground
Strap
* See note at the
end of Table 4.
* See note at the
end of Table 4.
Source. Local power and ground connections to the assembly are
made to TB5. See Table 4 for power and ground connections.
For convenience, Westell offers a wall‐mounted (plug‐in) power
supply, part A90‐204100.
3.7 Securing Cables
After the assembly has been mounted and all wire connections
have been made, use the four cable ties provided to secure all
wires/cables.
3.8 Installing Modules
When all wiring is completed and secured, the module(s) may be
installed inside the assembly cover. The unit makes electrical
connection when installed and properly seated in the 56‐pin
card‐edge connector of the assembly. Refer to the appropriate

Section DTW‐A52‐802‐202 030‐101665 Rev. C R
61205I2RC
practice for optioning and testing information for each module.
When testing is complete and the circuit is functioning correctly,
close and re‐lock the cover (List 4 and 4‐9 options).
‐ CAUTION ‐
Use care when installing and removing modules ‐ do not force into
place. If a module resists insertion, remove it and check for debris in
or near the connector and mounting slot. Gently re‐insert the module.
4. TROUBLESHOOTING
If trouble is encountered, verify all installer connections to the
assembly and check that the CO power fuse is not blown. Also
verify all module connections and option switch settings, and
verify the modules are making a positive connection with the
shelf connector. If trouble persists, replace the suspect assembly
and repeat procedures outlined. These procedures are not de
signed to effect repairs or modifications. Procedures beyond
those outlined herein or repairs made beyond replacing a faulty
assembly are not recommended and may void the warranty.
5. CUSTOMER & TECHNICAL SERVICES
5.1 Customer Service & Technical Assistance
If technical or customer assistance is required, contact Westell by
calling or using one of the following options:
Voice: (800) 377‐8766
email: [email protected]
For additional information about Westell, visit the Westell
World Wide Web site at http://www.Westell.com.
5.2 Part Numbers
This equipment is identified by a model number and an issue
number. Each time a change is made to the product which
changes the form, fit, or function of the product, the issue num
ber is incremented or advanced by one. Be sure to indicate the
issue number as well as the model number when making inquiries
about the equipment.
6. WARRANTY & REPAIRS
6.1 Warranty
Westell warrants this product to be free of defects at the time of
shipment. Westell also warrants this product to be fully function
al for the time period specified by the terms and conditions
governing the sale of the product. Any attempt to repair or
modify the equipment by anyone other than an authorized West
ell representative will void the warranty.
6.2 Repair and Return
Westell will repair or replace any defective Westell equipment
without cost during the warranty period if the unit is defective
for any reason other than abuse, improper use, or improper
installation. To return defective equipment, first request a Re
turn Material Authorization (RMA) number from Westell by
calling or using one of the options shown below. Once an RMA
number is obtained, return the defective unit (freight prepaid),
along with a brief problem description, to the address we will
provide to you when you contact us.
Voice: (630) 375‐4457
email: [email protected]
Replacements will be shipped in the fastest manner consistent
with the urgency of the situation. Westell will continue to repair
or replace faulty equipment beyond the warranty period for a
nominal charge. Contact Westell for details.
‐ TL9000 RECYCLING NOTE ‐
Westell recommends that its products be recycled at the end of their product
life. For Westell products that have reached their product End Of Life
(EOL), please recycle and dispose of the products per your company prac-
tice, per local recycling programs and local codes, and per state statutes.
7. SPECIFICATIONS
To order assemblies, call the telephone number shown in Para
graph 5.1 and specify a part number shown in Table 6. The
electrical and physical specifications are shown in Table 5.
Physical Feature U.S. Metric
Height 3.25 in. 8.3 cm
Width (including door) 5.75 in. 14.6 cm
Depth (incl. ground lug) 9.25 in. 23.5 cm
Weight (empty, approx.) 3.1 lb. 1.4 Kg
Operating Temp. ‐40°F to 149°F ‐40°to 65°C
Humidity 0 to 95% (non‐condensing)
Electrical Feature Description
Input Power ‐42 to ‐56 VDC, or simplex line power
Output power to plug‐ins ‐42 to ‐56 VDC, or simplex line power
NEBS Level 3 and UL60950 certification by an NRTL
Table 5. Specifications
Part Number CLEI* Code / Barcode / CPR
FAC
Connections
CPE
Connections Locking
Cover
Wirewrap
pins
Screw
Terminals RJ48C/S Screw Terminals
DTWA528‐02I2L4 VAM72B0ARA / 445284 / N70793 X X X X
DTWA528‐02I2L4‐9 VAM74B0ARA / 445286 / N70795 X X X
Optional Equipment for use with the DTWA528-02I2 Series Mountings
A90‐204100 Optional external AC to ‐48VDC/1.25A power supply.
* CLEI is a trademark of Telcordia Technologies.
Table 6. Ordering and Option Information