ADTRAN NIU3 Instruction Manual

61212070L2-5A Section 61212070L2-5, Issue 1 1
DS3 Network Interface Unit
NIU3 Standalone Housing
Installation and Maintenance Practice
Section 61212070L2-5A
Issue 1, May 2003
CLEI Code Standalone Housing: NCM57WVD_ _
CONTENTS
1. General................................................................ 1
2. Installation .......................................................... 2
3. Turn-Up .............................................................. 4
4. Operation ............................................................ 4
5. Maintenance ....................................................... 4
6. Specifications ..................................................... 4
7. Warranty and Customer Service......................... 5
FIGURES
Figure 1. Standalone Housing w/NIU3 ................... 1
Figure 2. NIU3 Standalone Rear Panel ................... 2
Figure 3. NIU3 Circuit Arrangement ...................... 2
Figure 4. Local DC Power Connection ................... 3
Figure 5. AC/DC Transformer Power ..................... 3
TABLES
Table 1. Configuration Codes ................................ 4
Table 2. Standalone Specifications ........................ 5
Figure 1. Standalone Housing w/NIU3
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
1. GENERAL
This practice is used in association with the NIU3
practice, P/N 61212075Lx 5. Refer to Specifications
section for additional information.
The NIU3 standalone housing installs at the customer
premises at a designated location convenient to the
customer. The housing can be oriented in any
position allowing clearance to fully open the cover.
Revision History
This is the first issue of this document. Future
changes to this document will be summarized in this
paragraph.
Features
The standalone housing provides the following
features and functions:
• Pass through relays for signal reliability during
power loss or card removal.
• Sturdy metal construction.
• Durable powder coated enamel finish.
• All threaded fasteners.
• Card guides for easy card insertion.
• Transparent viewing panel.
• Hasp for locking the cover.
• Wire tie down extrusion.
• Easy to read label identification.
• Portals for power and ground wires.
Description
The standalone housing is designed to mount to a
plywood backboard. The body has four mounting
screw holes on raised extrusions, which provide
clearance from the backboard. The housing interior
holds a host circuit board designed to accept the NIU3
circuit card. Card guides direct the NIU3 for correct
insertion and also secure the unit from vertical
movement. When properly inserted, the NIU3
thumbscrews on the front panel align and fasten to
threaded holes on the standalone body, providing a
secure assembly.
A D T R A N 1 9 9 8
5 1 50 . 0 95 - 1 B
C C O P Y R I G H T
CUST
NTWK
PWR
LBK
SEL
NTWK MON
CUST MON
1212075
NIU3
LBK

2 Section 61212070L2-5, Issue 1 61212070L2-5A
The rear panel has portals for power and ground
wires, plus four BNC connectors:
• two for network transmit/receive
• two for customer transmit/receive
All front and rear panel items are clearly labeled. A
wire tie anchor point is also on the rear panel. See
Figure 2 for rear panel arrangement.
2. INSTALLATION
After unpacking the unit inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. Refer to Warranty and Customer
Service.
Location
The NIU3 is designed for installation between the
ADM and customer equipment. The NIU3 can pass
both network and customer signals up to 900 feet.
However, if either distance exceeds 450 feet, the
respective front panel monitoring signal begins to
degrade. Also, during NIU3 bypass operations, if total
transmission distance exceeds 900 feet, signal quality
may degrade. See Figure 3 for NIU3 network
arrangement and maximum recommended signal
distance.
Figure 3. NIU3 Circuit Arrangement
Figure 2. NIU3 Standalone Rear Panel
IN Indicates Receive from Network or Customer.
OUT Indicates Transmit to Network or Customer.
OUTINOUT
CERT. TO CAN/CSA STD.
C22.E.NO. 225-950
99202271
CONF. TO ANSI/UL
STD 1950
IN
POWER
CUSTOMER 48V , 125mANETWORK
1212070L2
C A U T I O N
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.

61212070L2-5A Section 61212070L2-5, Issue 1 3
Mounting
Install the unit per NEC NFPA 70 requirements. The
NIU3 standalone housing can mount at any
convenient location adjacent to the customer:
• Position the housing at the designated location.
• Ensuring the housing is plumb, mark the four
mounting holes for pilot hole location.
• Using an appropriate sized bit, drill the four pilot
holes.
• Align the housing to the pilot holes and fasten to
the backboard with supplied screws.
Connections
The NIU3 operates on local –48 VDC. The
standalone housing has a power wire portal on the rear
panel for termination at TB1, which has spade lug
terminals for 48 V(–), 48 V(+)/GND, and Frame
Ground (see Figure 4).
Optional frame ground is provided by a ground lug
(J1) on the host circuit board. J1 is electrically
connected to TB1. A ground wire portal on the rear
panel of the housing provides access for this ground
wire. J1 is a screw compression terminal requiring a
solid copper wire.
CAUTION
Per GR 1089 CORE, October 2002, Section 9,
this system is designed and intended for
installation in a DC C (common) bonding and
grounding system only. It is not intended or
designed for installation in a DC I (isolated)
bonding and grounding system.
Wiring
Wiring consists of two elements: power and data. The
host circuit board power terminal strip (TB1) is
designed for spade lug terminations. Use suitably
sized copper conductors only.
Power
WARNING
Ensure power is off before making wiring
connections.
• From a local power source, feed the wire through
the Power portal on the housing rear panel.
• Make wiring connections to TB1 as shown in
Figure 4 or 5 as applicable.
• Dress and lace wire runs as necessary.
Figure 4. Local DC Power Connection
Figure 5. AC/DC Transformer Power
An optional power source is from a standard 120 VAC
wall outlet via a separately purchased transformer
with 48 VDC @ 200 mA output. In this case the (red)
power wire is connected to the 48 V(+)/GND terminal
and the (black) return wire to the 48 V(–) terminal.
The green wire connects to the Frame Ground
terminal (Figure 5). See requirements in Compliance
subsection.
CAUTION
Terminate grounds to an approved ground
location. Check metal to metal contact on all
ground connections, ensure ground circuit
continuity.
48V(+)/GND
GRN
RED
BLK
TB1
48V
200mA
48V(–)
RETURN
SUPPLY
48V( + )/GND
TB1
48V( - )
J1

4 Section 61212070L2-5, Issue 1 61212070L2-5A
Data
The standalone housing has four BNC connectors: two
(IN/OUT) for network receive/transmit, and two
(IN/OUT) for customer receive/transmit.
• Connect the appropriate cables to the BNCs.
• If not already accomplished, connect the opposite
ends to their designated terminations.
• Dress and lace the wire runs as necessary.
Fuse
The –48 VDC is fused on the NIU3 card.
Options
Aside from power source and ground termination,
there are no options associated with the NIU3
standalone housing.
3. TURN-UP
When an NIU3 is inserted into a standalone housing
with power on the host circuit board, the PWR LED
turns ON red while the NIU3 performs a self test
during which the remaining LEDs go through an ON/
OFF sequence. If the test passes the PWR LED turns
ON green indicating the NIU3 is online. If the test
fails the LED remains red and the bypass relays
maintain data flow around the NIU3.
4. OPERATION
The NIU3 standalone host circuit board exchanges
data to and from the network loop and customer loop
via the BNC connectors. During operation the NIU3
is transparent to data flow. If the NIU3 fails or is
removed from the circuit, relays on the standalone
host circuit board provide pass through transmission
so data flow can resume.
During troubleshooting operation, the NIU3 will
loopback test data to the originating station. NIU3
troubleshooting tests are intrusive to data
transmission.
LED Indication
There are no LEDs on the standalone housing.
However, NIU3 LEDs provide indication for NIU3
and standalone housing configuration and status.
5. MAINTENANCE
The standalone housing does not require maintenance
for normal operation.
6. SPECIFICATIONS
Refer to Table 1 for Configuration Codes and Table 2
for standalone unit specifications and part numbers.
Compliance
Use one of the following requirements for powering
the unit locally:
a. Connect to a grounded –48 VDC source,
electrically isolated from the AC source. Provide
branch circuit overcurrent protection with a fuse
or circuit breaker, minimum 48 VDC, maximum
15 A. Provide an easily accessed approved and
rated disconnect device in the field wiring.
b. Connect to an approved Class 2 Type (LPS)
power supply rated 48 VDC, maximum 240 VA.
Standards
NEBS: Level 3
ANSI: T1.404
UL: 1950
Code Input Output
Power Code (PC) F C
Telecommunication Code (TC) – –
Installation Code (IC) E –
Table 1. Configuration Codes

61212070L2-5A Section 61212070L2-5, Issue 1 5
Table 2. Standalone Specifications
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7. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
the warranty period if it does not meet its published
specifications or fails while in service. Warranty
information can be found at
www.adtran.com/warranty.
U.S. and Canada customers can also receive a copy of
the warranty via ADTRAN’s toll free faxback server
at 877 457 5007.
• Request Document 414 for the U.S. and Canada
Carrier Networks Equipment Warranty.
• Request Document 901 for the U.S. and Canada
Enterprise Networks Equipment Warranty.
Refer to the following subsections for sales, support,
CAPS requests, or further information.
ADTRAN Sales
Pricing/Availability:
800-827-0807
ADTRAN Technical Support
Pre-Sales Applications/Post-Sales Technical Assistance:
800-726-8663
Standard hours: Monday Friday, 7 a.m. 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade:
[phone]
Repair and Return Address
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807

6 Section 61212070L2-5, Issue 1 61212070L2-5A
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