ADTRAN NIU3 Mode d’emploi

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

POWER

CUSTOMER 48V , 125mANETWORK

1212070L2

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( - )

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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erutarepmeTegarotS

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−(Cº07otCº04 −)Fº851otFº04

−(Cº58otCº04 −)Fº581otFº04

36RGreP

lacisyhP

snoisnemiD

thgieW

ediwsehcni6xpeedsehcni11xhgihsehcni2

secnuO8:draobtiucric3UIN

sdnuop0.2:ylbmessagnisuohenoladnatS

rewoP

stloV

tnerructupnixaM

−lanimonCDV84

Am521

ecnailpmoC

SBEN

ISNA

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0591

404.1T

srebmuNtraP

gnisuoHenoladnatS

3UIN

remrofsnarTCD/CA

__DVW75MCN:IELC,1L0702121

__ADEE3DCN:IELC,1L5702121

)desahcrupyletarapes(30V84KSD0633

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:

(256) 963-8722

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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