Instruction manual

DLP-11 Connecting the Alarm Contacts

Introduction

This DLP explains how to connect the alarm contacts for the ATLAS.

Prerequisite Procedures

Before making alarm connections, the unit should be mounted in its permanent location.

Tools and Materials Required

• Wire strippers

• Small, straight slot screwdriver

• 22 or 24 AWG 2-conductor twisted pair cross-connect wire

Instructions for Connecting Alarm Contacts

1. Determine whether the external alarm reporting device uses normally open (NO) or normally closed

(NC) relay contacts to sense an alarm condition. (Table 1 on page 345 shows the ATLAS alarm relay

pinout.)

2. Figure 1 on page 345 and Figure 2 on page 346 show enlarged drawings of the alarm relay connectors.

3. Using standard Telco cross-connect wire or equivalent, determine and cut the length required to reach

from the alarm header to the alarm-reporting device(s).

4. Using wire strippers, strip ¼-inch from both ends of each wire.

5. Remove the alarm relay (4 pin) terminal block by gently prying it loose.

6. Using the small, straight slot screwdriver, loosen the screws in the terminal block.

To prevent electrical shock, do not install equipment in a wet location or during a

lightning storm.

Electronic modules can be damaged by static electrical discharge. Before handling modules,

wear an antistatic discharge wrist strap to prevent damage to electronic components. Place

modules in antistatic packing material when transporting or storing. When working on

modules, always place them on an approved antistatic mat that is electrically grounded.