Westell DTWA528-04 Series User manual

Equipment Issue 2
030-101667 Rev. A, February 2008
Section DTW-A52-804-202
R
ECopyright 2008 Westell, Inc. All rights reserved. Westell and 200 MECHANICSrare registered trademarks of Westell, Inc.
Page 1 of 6
0802I2RA
DTWA528-04 Series of 4-Slot Universal Data Mountings
CONTENTS PAGE #
1. GENERAL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. OPTIONS & FEATURES 2. . . . . . . . . . . . . . . . . . . . . . .
3. INSTALLATION 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 DTWA528-04I2 series of
4-Slot, Universal, Data Mounting Assemblies. A typical mounting
is shown in Figure 1.
- NOTE -
Hereafter, the DTWA528-04I2 may be referred to as the
528-04I2" 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 document replaces document 030-101585
for the models listed in Table 1.
1.3 Product Purpose and Application
1.3.1 The 528-04I2 is a universal, data wall-mount assembly which
has four slots or circuits to terminate either two 400-mechanics-
type modules or four 200 MECHANICSr-type modules
(high-density). This assembly accepts modules designed for the
purposes 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
1.3.2 All Network Interface (Telco) connections are made at barri-
er-type screw terminal blocks (or wirewrap pin headers for the List
9 Option). Customer Interface (Cl) connections are made through
either RJ48C/S modular jacks or through barrier-type screw termi-
nal blocks (or wirewrap pin headers for the List 9 Option). A
locking metallic cover protects the Customer and Telco connec-
tions when the List 4 Option is selected.
1.4 Product Mounting
The 528-04I2 is typically wall-mounted at the customer premises
on the network side of the point of demarcation. Holes for mount-
ing screws are provided in the bottom of the assembly. The
Figure 1. Isometric View of DTWA528-04I2
528-04I2 also may be set on a desk, shelf, or tabletop for horizontal
mounting. The 528-04I2 can also be installed in a 19-inch or
23-inch equipment rack by specifying the mounting bracket kit,
Model MBA1923-2.
1.5 Product Features
Features of the 528-04I2 are as follows:
SSmall footprint
SAccepts either two 400-type modules or up to four 200-type
modules for use in Hi-Cap/T1/Digital/Analog applications
SNetwork connections made to screw-type terminal blocks or
wirewrap pins, depending on model ordered
SCustomer connections include screw-type terminal blocks (or
wirewrap pins) and RJ48C jacks or RJ48S jacks
S4 switches enable user to switch between RJ48C or RJ48S jack
applications
SPower/ground connections made to screw terminal block
SOptional power supply available with the List 6 Option
STinted, see-through, front window allows visual monitoring 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 4-slot module housing
SIn closed position, assembly allows convenient rear access to
optional customer RJ48C/S jacks while protecting the Telco and
customer terminal block connections
SCompact, versatile, wall-mountable or tabletop-mountable
metallic case
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

Section DTW-A52-804-202 030-101667 Rev. A R
20802I2RA
Model Number CLEI* Code FAC Connections CPE Connections Locking Cover Power
Wirewrap
(List 9 option)
Screw
Terminals
RJ48C/S
Jacks
Screw
Terminals
g
(List 4 option) (List 6 option)
DTWA528-04I2 VAM7ZC0ARA X X X
DTWA528-04I2L6 N/A X X X A90-204100
DTWA528-04I2L4 VAM72C0ARA X X X X
DTWA528-04I2L4-9 VAM74C0ARA X X X
Notes: 1. All assemblies accommodate up to 4 half-width (200 MECHANICSr) modules or 2 full-width (400-type) modules. *CLEI is a trademark of Telcordia Technologies.
Table 1. Ordering and Option Information
2. OPTIONS & FEATURES
The 528-04I2 contains various features, switches, and screw termi-
nal blocks or wirewrap pin headers, to option the unit for proper
operation, as shown in Figure 3 and Figure 5 and described below,
to option the unit for proper operation.
- LIST 9 WIREWRAP PIN NOTE -
The 528-04I2 provides internal wirewrap pin connectors for Network and
Customer connections, instead of screw terminals. Substitute the term wire-
wrap pin header" for screw terminal block" for the 528-04I2, List 9.
2.1 Network Connections
Telco/Network wires are connected to four, four-position, barrier-
type, screw terminal blocks (TB5, TB6, TB7 and TB8). Each block
interfaces to a specific circuit, as listed in Table 2. Each block has
four positions, T, R, T1 and R1, as shown in Table 5. If 400-type
modules (twice the width of 200-type modules) are used, insert one
into slot/circuit #1 (top slot when assembly is in the closed posi-
tion). The other 400-type module will insert into slot/circuit #3.
Circuit/Slot # Terminal Block/Wirewrap Header
1 TB5
2 TB6
3 TB7
4 TB8
Table 2. Network Connections
2.2 Customer Premises Equipment Connections
Customer Premises Equipment (CPE) connections to the assem-
bly can be made to four, four-position, barrier-type, screw terminal
Figure 2. 528-04I2 Typical Applications
Cross
Connect
Central Office
Test
Equipment
IOR
ILR ILR
Telco #4
TB8
NIU
#4
528-04I2
CPE#4
TB4 CPE
IOR
ILR ILR
Telco #3
TB7
NIU
#3
CPE#3
TB3 CPE
IOR
ILR ILR
Telco #2
TB6
NIU
#2
CPE#2
TB2 CPE
IOR ILR ILR
Telco #1
TB5
NIU
#1
CPE#1
TB1 CPE
Figure 2a. 528-04I2 Configured as a 4-Position NIU/HDSL Mounting Using a 200 MECHANICS NIU
Cross
Connect
Central Office
Test
Equipment
IOR ILR ILR
Telco #2
TB7 NIU#2
CPE#2
TB3 CPE
IOR ILR ILR
Telco #1
TB5 NIU#1
CPE#1
TB1 CPE
Figure 2b. 528-04I2 Configured as a Dual Mounting Using Two 400-type NIU/HDSLs
Cross
Connect
Central Office
Test
Equipment
Telco #2
TB7
DDI CPE#2
TB3 CPE
Telco #1
TB5
DDI CPE#1
TB1 CPE
Figure 2c. 528-04I2 Configured as a Dual DST or DDI Mounting Using Standard 400 or 200 MECHANICS DST or DDI
ISQ
ISQ
DST
DST
RJ48C
RJ48C
RJ48C
RJ48C
RJ48C
RJ48C
RJ48S
RJ48S
HCU
or
HCU
or HRU
or
HRU
or
or
or
528-04I2
528-04I2

Section DTW-A52-804-202
030-101667 Rev. A
R
3
0802I2RA
Figure 3. 528-04I2 Interior View, Cover Open,
Typical Tabletop-Mounted Position
Card Guides
56-Pin Card-Edge
Hinged Cover
Swing-Open
For Modules
Wire/Cable Access
Rear-Accessible
Customer RJ Jack,
Power/Ground
Ribbon Cable
(4 sets)
(1 of 4)
(1 of 4: J1 - J4)
(4-Position)
Terminal Block
See-through
Module Window
Network
(2 of 4)
Terminal Blocks*
Connectors
Wiring Label
*The List 9 Option contains wirewrap
pin headers instead of screw terminals.
blocks (TB1, TB2, TB3 and TB4) or to jacks J1-J4 (either RJ48C
or RJ48S-type modular jacks), as listed in Table 3. Use Switches
S1-S4 to select the desired and correct configuration, either RJ48C
or RJ48S. Table 6 lists CPE connections.
Circuit/Slot # Terminal Block/Wirewrap Header RJ48C/S
1 TB1 J1 (CKT 1)
2 TB2 J2 (CKT 2)
3 TB3 J3 (CKT 3)
4 TB4 J4 (CKT 4)
Table 3. Customer/CPE Connections
S1-S4 Position Application Type
RJ48C T1, Hi-Cap, NIU, HDSL
RJ48S Analog Data Services, DST Module, Digital Data Service,
DDI Module, IDSL (ISDN DSL)
Table 4. S1-S4 Positions for Typical Applications/Modules
2.3 S1-S4 Slide Switches
The 528-04I2 contains four slide switches, S1 (CKT 1) through S4
(CKT 4), to provision the J1-J4 customer RJ48 jacks for use in ei-
ther an RJ48C or an RJ48S configuration. If the customer
application requires RJ48C jacks, set S1-S4 to the RJ48C position.
If the customer application requires RJ48S jacks, set S1-S4 to the
RJ48S position. If 400-type modules (twice the width of 200-type
Figure 4. Rear View of 528-04I2
RJ48C/S Connectors
J1 - J4
Ground Lug
Cable
Access
Hole
modules) are used in the assembly, one can be inserted into circuit/
slot #1 (top slot when in the closed position) which interfaces with
J1 and S1. The other 400-type module can be inserted into circuit/
slot #3 and interfaces with J3 and S3.
2.4 TB9 - Power and Ground Connections
TB9 is a 4-position screw terminal block for power and ground con-
nections to the assembly. The four positions are +PWR, FRAME
GND, -PWR, and CIRCUIT GND (Table 7). The +PWR position
is used to connect the positive terminal from the Part A90-204100
(117 VAC to -48 VDC), or equivalent power supply. FRAME
GND is available as an option to connect to Earth ground as stated
in Paragraph 2.5. CIRCUIT GND must be connected to an earth
ground regardless of the power source. Use an insulated wire of 24
AWG or greater (see Figure 6 and Figure 7). The -PWR position
is used to connect the negative terminal from the Model
A90-204100 (or equivalent 48 volt 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 pro-
vided in the parts bag, and on the DTMA528-04L4 it is factory
installed.
SExterior Frame Ground Lug on Rear of Assembly (Preferred
Method). A chassis ground lug, labeled FRAME GND, is
provided on the rear of the metal housing. This (Refer to Fig.
4) lug should be used to earth ground the metal housing.
SInterior TB9 Frame Ground Screw Terminal (Inside Assem-
bly). A chassis ground screw terminal on TB9, labeled FRAME
GND, located inside the assembly can be used as an optional
method for earth-grounding the metal housing (Figure 4,
Figure 5, Figure 6 and Figure 7) when local power is supplied.
SOptional Interior TB9 Removable Ground Strap. The 528-04I2
features a factory-assembled, pre-installed, ground strap for
applications requiring chassis ground to be connected to circuit
ground. The strap is connected across TB9’s FRAME GND and
CIRCUIT GND terminals. On some units, this optional strap
is provided, but not factory-installed.

Section DTW-A52-804-202 030-101667 Rev. A R
40802I2RA
Figure 5. 528-04I2 Interior Typical Wall-Mounted Position
Keyhole-Slotted
(4 total, for
Mounting Holes
wall-mounting)
Network
Terminal Blocks*
(TB1 & TB3,
2 of 4 total)
Network
Terminal Blocks*
(TB6 & TB8)
2 of 4 total)
Customer
Terminal Blocks*
2 of 4 total)
Power/Ground
Terminal Block
*The List 9 Option provides wirewrap pin headers instead of screw terminals.
3. INSTALLATION
The assembly should be installed by authorized trained personnel
only. In accordance with UL 60950, this assembly is suitable for
mounting on concrete or other noncombustible surfaces only and
is for use in restricted access locations only. Installation consists of
inspecting the assembly for damage, selecting the mounting site or
location, gathering all necessary tools and hardware, mounting the
assembly, making all grounding and power connections, perform-
ing 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 was damaged in transit, immediately report the extent of
the damage to the transportation company and to Westell.
CAUTION - STATIC-SENSITIVE
This product and modules installed inside it may contain
static-sensitive components! Follow proper electrostatic discharge
procedures 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.
For use in restricted access locations only.
3.1 Selecting the Mounting Location & Application
The 528-04I2 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 installation.
Also ensure that adequate clearance (approximately 2 inches) is
available for opening the cover/door and for inserting and remov-
ing the module(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)
3.3 Mounting the Assembly to a Wall
1. Loosen the top-cover screw or, if key lockable, insert the key
and rotate the key lock to unlock the cover.
2. Using the mounting screw keyholes in the assembly’s base plate as
a template, carefully lift the assembly to the desired mounting posi-
tion on the wall and mark the four screw hole locations for the
assembly (see Figure 5). Note that each of the mounting holes are
key-hole slotted to allow the assembly to be mounted so the Cus-
tomer Interface connections face either left, right, or down.
3. Drill the four holes in the mounting surface.

Section DTW-A52-804-202
030-101667 Rev. A
R
5
0802I2RA
4. Lift the assembly and place the 528-04I2 base plate on the wall,
aligning the holes in the base plate with the drilled holes in the
mounting surface.
5. Insert the first mounting screw into the top left hole in the base
plate, and tighten or drive the screw until approximately ¼-inch
remains.
6. Insert the remaining three screws and fasten until approximate-
ly ¼-inch remains.
7. Carefully align, position, and hold the assembly in its final posi-
tion and finish driving the screws. Tighten all screws.
- NOTE -
The 528-04I2 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.
3.4 Connecting Telco/Network Interface Cables
Telco or network interface connections to the assembly are made
to screw terminal blocks using shielded twisted pair cable (22-24
AWG minimum) of a length consistent with local installation prac-
tices. Telco/network connections are listed in Table 2 and Table 5.
- LIST 9 WIREWRAP PIN NOTE -
The List 9 Option provides wirewrap pin connectors inside the unit for
Network and Customer connections, instead of screw terminals. Substi-
tute the term wirewrap pin header" for screw terminal block" when ref-
erencing the 528-04I2, List 9.
Card Edge Connector Telco Position on
TB5 TB6 TB7 TB8
Function Pin # TB5, TB6, TB7, TB8
Receive from Network 7 T
Receive from Network 13 R
Transmit to Network 41 T1
Transmit to Network 47 R1
Table 5. Telco Interface Connections
Card Edge Connector CPE Connector Position/Pin
Function Pin # TB1, TB2, RJ48C RJ48S
Function
Pin
#
TB1
,
TB2
,
TB3, TB4
RJ48C
J1-J4
RJ48S
J1-J4
Receive from CPE 55 T 5 2
Receive from CPE 49 R 4 1
Transmit to CPE 5 T1 2 7
Transmit to CPE 15 R1 1 8
Table 6. Customer Interface Connections
3.5 Connecting Customer Interface Cables
Make customer connections to J1-J4 (the RJ48C/S jacks) or to the
screw terminal blocks using shielded twisted pair cable (22-24 AWG
minimum) of a length consistent with local installation practices. If
400-type modules (twice the width of 200-type modules) are used
in the assembly, one can be inserted into circuit/slot #1 (top slot
when in the closed position) which interfaces with J1 and S1. The
other 400-type module can be inserted into circuit/slot #3 and in-
terfaces with J3 and S3. Figure 8 illustrates the physical and
electrical layout of the unit. Also see Table 3 and Table 6 for custom-
er connections.
- 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.
- CAUTION -
Never apply power until all installer connections are made.
3.6 Connecting Power and Ground
The module(s) in the 528-04I2 can be span/line powered or locally
powered with an external -48 VDC power source. Local power and
ground connections to the assembly are made to TB9. See Table 7
for power and ground connections. For applications where -48 V
bulk power is not readily available, the Westell A90-204100 wall-
mounted (plug-in) power supply (117 VAC to -48 VDC), can be
ordered separately for use with the 528-04I2.
Function TB9 Terminal Block Label
-48V Ext. Power In -PWR
Earth Ground FRAME GND*
Lightning Return Ground CIRCUIT GND*
+48V Ext. Power In +PWR
*Note: For applications requiring chassis ground to be connected to circuit ground, an optional ground strap is
provided for installation between the CHASSIS GND and CIRCUIT GND terminals on TB9.
Table 7. Power and Ground Connections
3.7 Securing Cables
After the assembly has been mounted and all wire connections are
made, use the 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. Refer to the appropriate prac-
tice for optioning and testing information for each module. When
Mounting
+PWR
CHASSIS GND
-PWR
TB9
Chassis
Ground
Lug
To
Lightning
Return
To Ground Window (e.g., cold water pipe)
Figure 6. Grounding with Span Power
CIRCUIT GND
Optional*
Ground
Strap
* See note at the
end of Table 7.
Mounting
+PWR
CKT GND
-PWR
TB9
Chassis
Ground
Lug
To Lightning
Return Ground
To Ground Window (e.g., cold water pipe)
-
GND
Local
Power Supply
Figure 7. Grounding with Local Power
CHASSIS GND
+
Optional*
Ground
Strap
* See note at the
end of Table 7.

Section DTW-A52-804-202 030-101667 Rev. A R
60802I2RA
Figure 8. 528-04I2 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 ALL
4 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
OR
CKT#3
OR
CKT#4
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−J4
OR
XMIT TO
CPE
RCV FROM
CPE
CUSTOMER
CONNECTIONS
FACILITY
CONNECTIONS
SWITCH TO CONFIGURE RJ48 JACK FROM:
”C” TO ”S”
CKT#1
CKT#2
CKT#3
CKT#4
SLOT POSITIONS
testing is complete and the circuit is functioning correctly, close
and re-lock the cover (List 4 Option).
- 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 as-
sembly 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 connec-
tor. If trouble persists, replace the suspect assembly and repeat
procedures outlined. These procedures are not designed to effect
repairs or modifications. Procedures beyond those outlined herein
or repairs made beyond replacing a faulty assembly are not recom-
mended and may void the warranty.
5. CUSTOMER & TECHNICAL SERVICES
If technical or customer assistance is required, contact Westell by
calling or using one of the following options:
Voice: [phone]
email: [email protected]
Visit the Westell World Wide Web site at http://www.Westell.com
for additional information about Westell.
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 functional
for the time period specified by the terms and conditions governing
the sale of the product. Any attempt to repair or modify the equip-
ment by anyone other than an authorized Westell representative
will void the warranty.
6.2 Repair and Return
Westell will repair or replace any defective Westell equipment wi-
thout 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 Return Material Au-
thorization (RMA) number from Westell by calling or using one of
the options shown below. Once an RMA number is obtained, re-
turn the defective unit (freight prepaid), along with a brief
problem description, to the address we will provide to you when
you contact us.
Voice: [phone]
email: [email protected]
Replacements will be shipped in the fastest manner consistent with
the urgency of the situation. Westell will continue to repair or re-
place faulty equipment beyond the warranty period for a nominal
charge. Contact Westell for details.
7. SPECIFICATIONS
7.1 Ordering Specifications. To order assemblies, call a tele-
phone number shown in Paragraph Table 1 and specify a part
number shown in Table 1.
7.2 Physical and Electrical Specifications. The electrical and
physical specifications are shown in Table 8.
Physical Feature U.S. Metric
Height 4.5 in. 11.4 cm
Width 5.75 in. 14.6 cm
Depth (incl. ground lug) 9.25 in. 23.5 cm
Weight (empty, approx.) 3.8 lb. 1.7 Kg
Operating Temp. -40°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
Designed for NEBS Level 3 compliance and UL 60950 listed by an NRTL
Table 8. Specifications