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Installation Instructions

for the DS7457

Single Zone Multiplex Input Module

1.0 Description

The DS7457 is a Single Zone Multiplex Input Module that

is designed to operate with compatible multiplex systems.

It is intended to monitor conventional Normally Open or

Normally Closed dry contacts and report their status as

multiplex addresses to the control system. The DS7457

can monitor one loop and provides a separate tamper

loop. It occupies one multiplex zone address on the

system.

2.0 Specifications

• Control Panel Requirements: The DS7457 is designed

to work with the following control panels:

• A Detection Systems DS7400, DS7400X, or

DS7400Xi control panel with a DS7430 or DS7436

Multiplex Expansion Module. The DS7400 and

DS7400X require ROM version 1.07 or greater.

• A Detection Systems DS9400 AddressiFire 255

Series Fire Alarm Control Panel (FACP) with a

DS9431 Multiplex Expansion Module. The DS9400

requires ROM version 2.0 or greater.

• Wiring: Refer to the specific multiplex expansion

module's literature for multiplex wiring requirements.

The length of the wiring connected to the protection

loop (and tamper loop) on the DS7457 must be less

than 250 ft. (76 m).

• The recommended wiring to the control is standard

#18 (1.22 mm) or #22 (0.74 mm) AWG, quad (4-wire)

cable. Do not use shielded or twisted pair cable.

• Current Draw: 0.35 mA (Standby and Alarm)

• Minimum Voltage For Operation: 8 VDC peak

3.0 Installation

These instructions assume that the control panel is installed

and is working properly.

IMPORTANT

The DS7457 must be programmed before installation.

See your panel installation guide for programming

information.

Disconnect the power to the multiplex loop before running

wires and connecting the DS7457. Connect the DS7457 as

shown in the following examples.

See Figure 1 for detailed noise suppression diode

connections. The diode appears in Figures 2-5.

Cathode end

Bus A (+)Bus A (+)

Bus A (-)Bus A (-)

From

multiplex bus

To DS7457

Red

Black

Figure 1: Noise Suppression Diode Connections

IMPORTANT

Make sure the cathode end of the noise suppression

diode, indicated by a white stripe, connects to the

positive (+) line.

3.1 DS7400 Series Control Panel Wiring

UL Listed

Noise Suppression Diode

(P/N: 47985)

NOTE:

If not using the tamper circuit, connect the

orange and black tamper wires together.

+ –

Use

47 k

Ω

P/N: 26069

for non-fire applications.

Use

47 k

Ω

P/N: 28010

for fire applications.

N/C

N/O

Tamper Switch

(Normally Closed)

Alarm Contact (Normally

Open or Normally Closed)

DS7430 Multiplex Expansion Module

EOL

Bus

Alarm

Tamper

–

DS7457

Yellow

Black

Orange

Black

Red

Black

Figure 2: DS7430 to DS7400 Series Wiring

IMPORTANT

For UL Listed fire installations, Normally Open (N/O)

contacts must be used.

1 2

Sommario

Pagina 1 - Installation Instructions

Installation Instructionsfor the DS7457Single Zone Multiplex Input Module1.0 DescriptionThe DS7457 is a Single Zone Multiplex Input Module thatis desi

Pagina 2 - 4.0 Multiplex Programming

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