Nitek DL1142 User Manual

Installation and

Operation Manual

DL1142

RS422 Line Driver

NITEK

5410 Newport Drive, Suite 24 • Rolling Meadows, IL 60008

PHONE [phone] • FAX [phone]

Internet: www.nitek.net • E-mail: [e-mail]

®

CAT.NO.1348.2

1

System Specifications

DL1142 system includes the following:
(1) DL1142 Line Driver and (1) wall power transformer

DL1142 Unit

Size 1.1"H x 2.6"W x 4.3"D

Power Requirements 14 to 18 VDC @ 140mA

Input RS422

Output Extended RS422 for use

up to 12,000 feet

Introduction

DL1142 is a single unit that connects over twisted pair at the RS422

source or up to 4,000 feet away. It can extend RS422 type signals for
an additional 12,000 feet and works with all RS422-based equip­ment, including Pelco, Phillips, Panasonic, Sensormatic, Kalatel and

many others.

2

Installation

The DL1142 unit is a specially designed RS422 amplifier for con­nection in-line with any standard RS422 line. It may be connected
anywhere in-line from the beginning of a run, up to 4000 feet down
the run. From that point the DL1142 will re-amplify the RS422 signal
and drive it for another 12,000 feet. The DL1142 can be used to
increase the number of RS422 units in a chain or as a way to “Y”
off an RS422 signal. The following two diagrams show how each of
these ways can be used.

IMPORTANT NOTE !

Connecting the earth ground is important for the protection
of both the DL1142 and the devices to which it is connected.
Without proper grounding the DL1142’s built-in

tion

will not work.

Connect the source RS422 data wires to the “RS422 IN” terminals.
Connect the out going RS422 data wires to the “RS422 OUTPUT”
terminals. Remember to connect the earth ground wire.

Standard straight through connection

Surge Protec-

RS422

Any standard RS422

output device

This is a standard straight through hookup. The source RS422
line can be up to 4,000 feet long. The outgoing line can drive up
to 32+ standard RS422 devices at up to 12,000 feet away from

the Driver unit.

NITEK

DL1142

Twisted Pair

TM

up to 12,000 ft

wall transformer

(included)

Any standard RS422

input device

3