Section DTW-A52-828-201
030-101668 Rev. A
6
0802I1RA
screw terminals (B) can be used for the back-up or redundant
power source. The last two screw positions are labelled
FGND" and ALARM". A customer-provided, plug-in, pow-
er supply module can be installed in the right-most slot of each
shelf in the mounting, if desired.
2.7
Module Installation
The DTWA528-28 holds up to 28 200 MECHANICS
type TS1,
HDSL, DDS or Analog Data/Voice-type modules. Set all mod-
ule switch options and install all modules per manufacturer
instructions and company practice. Modules make electrical
connection to external equipment when installed and properly
seated in the card-edge connector in the assembly. Align the
module with the assembly card guides above and below the unit
and insert the module as far as it will go into the slot connector.
- CAUTION -
Use care when installing and removing modules -
do not force
a module into place
. If a module resists insertion, remove it
and check for obstructions in or near the module’s or shelf’s
connectors and mounting slots. The module may then be
carefully aligned and gently re-inserted.
2.8
Closing the Assembly
After all connections are made, power and ground connec-
tions are properly terminated, and all modules are optioned
aligned, and tested, the front cover can be replaced. Place the
front cover over the shelf assembly and slide the cover to the
left. Securely tighten the front cover thumbscrews, located on
each side of the assembly. Make sure the cover is positioned
properly over the CIM module. Lock the assembly with the
key, if applicable.
3.
TESTING & TROUBLESHOOTING
3.1
Testing
This equipment should not be field repaired. If the equipment
is suspected of being faulty, replace it with another unit, op-
tioned identically, and retest. If the replacement unit appears
to operate correctly, the original unit may be faulty and should
be returned to Westell for repair or replacement (Paragraph
5.2).
3.2
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 unit and
repeat procedures outlined. These procedures are not de-
signed to effect repairs or modifications. Any tests beyond
those outlined herein, or repairs made beyond replacing a
faulty unit, are not recommended and may void the warranty.
4.
CUSTOMER & TECHNICAL SERVICES
4.1
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:
For additional information about Westell, visit the Westell
World Wide Web site at http://
4.2
Part Numbers
This equipment is identified by a product number
(DTWA528-28), which consists of three parts: the assembly
type (DTWA − Digital Terminating Wall-mount Assembly)
and model number (528-28). If an option is provided, it is indi-
cated with a suffix (DTWA528-28L14).
5.
WARRANTY & REPAIRS
5.1
Warranty
Westell warrants this product to be free of defects at the time
of shipment. Westell also warrants this product to be fully func-
tional 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
Westell representative will void the warranty.
5.2
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) 375-4211
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.
6.
SPECIFICATIONS
6.1
Regulatory/Agency Specifications
The DTWA528-28 is designed to meet the following regulato-
ry, safety, or environmental specifications or requirements:
UL 1950 Listed
NEBS Level 3 Certified
