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Tamper Relay Board

Installation Guide

Page 1 of 3 P/N: 01513-001 Rev. D

The Tamper Relay Board (TRB) is used to provide external annunciation of controller enclosure and

peripheral enclosure tamper events; either an opened enclosure cover or for an enclosure that has

been removed from its mounting location (requiring additional installation steps by the Installer). The

TRB enables NXT-family and PXL-family controllers to meet UL-294/CSA Class 4812 requirements

for annunciation of controller tamper incidents. It is designed to accept standard types of tamper

switches. The Installer must supply the external annunciation device (alarm, signal light, etc.).

Figure 1: Tamper Relay Board Diagram

1.0 TRB PCB Installation

The NXT/PXL standard enclosure has a set of four PEMs in the upper-right corner of the enclosure to

which the TRB is mounted.

The NXT-4x4 and KPS power supply enclosure has four holes in the upper-right corner of the

enclosure. The TRB is mounted in this location using four stand-offs.

2.0 Tamper Switch Installation

Keri provides one enclosure tamper switch with each TRB. The switch is typically installed along the

edge of the enclosure opposite the enclosure hinge and clear of the enclosure lock (see Figure 2 on

page 2).

TAMPER SWITCH

BYPASS

12 VDC

GND

N/C

COM

N/O

RELAY

Red LED

Green LED

Relay Contacts

Unit Power

Tamper Switch

Connections

NXT Tamper

Connection

Tamper Bypass

Jumpers

Green LED

unit in

non-alarm

state

Red LED

unit in

alarm state

1 2 3

Sommario

Pagina 1 - 1.0 TRB PCB Installation

Tamper Relay BoardInstallation GuidePage 1 of 3 P/N: 01513-001 Rev. DThe Tamper Relay Board (TRB) is used to provide external annunciation of controll

Pagina 2 - 3.0 TRB Wiring Instructions

Tamper Relay BoardInstallation GuidePage 2 of 3 P/N: 01513-001 Rev. D Figure 2: Tamper Switch Installation3.0 TRB Wiring InstructionsRefer to Figure 1

Pagina 3 - 4.0 Unit Operation

Tamper Relay BoardInstallation GuidePage 3 of 3 P/N: 01513-001 Rev. DNXT Tamper Event Report Connection• allows the NXT controller to record an Enclos

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