Bosch D7050DH Installation Manual

D7050DH

Installation Instructions

EN

Multiplex Photoelectric
Duct Smoke Detector

D7050DH | Installation Instructions | 1.0 Description

Notices

Figure 1: D7050DH

These instructions cover the installation of the
D7050DH Multiplex Photoelectric Duct Smoke
Detector on a D7024 or a DS9400M 24 VDC Fire
Alarm Control Panel (FACP) with a D7039 or DS9431
Multiplex Expansion Module installed. The D7024 and
DS9400M requires ROM version 2.0 or greater.

Install, test, and maintain the D7050DH according to
these instructions, NFPA 72, local codes, and authority
having jurisdiction (AHJ).

Follow the procedures in these instructions
to avoid personal injury and damage to the
equipment. Failure to follow these
instructions can result in the D7050DH not
operating properly. Bosch is not
responsible for improperly installed, tested,
or maintained devices.

The D7050DH complies with Part 15 of the Federal
Communications Commission (FCC) Rules and with
the RSS-210 of Industry and Science Canada.
D7050DH operation is subject to the following two
conditions:

1. It does not cause harmful interference.

2. It must accept any interference it receives,

including interference that might cause undesirable
operation.

1.0 Description

The D7050DH (Figure 1) is Underwriters Laboratories,
Inc. (UL) Listed and requires a D343 Duct Detector
Housing. Use this detector with the D7024 or a
DS9400M that includes a D7039 or DS9431 Multiplex
Expansion Module.

An LED indicator on the head flashes every 3 to 8 sec
to ensure the D7050DH has power and the smoke
sampling circuitry functions. This LED flashes at least
once each second during an alarm confirming
individual detector alarms. The D7050DH
automatically resets after the alarm condition clears.

2.0 Installation

For installation details, refer to the D7024 FACP
Operation and Installation Guide (P/N: 31499), the
D9400M Reference Guide (P/N: 44578), the D7039
Installation Guide (P/N: 38685), or the DS9431
Installation Instructions (P/N: 41381).

1

4 in.

(10.2 cm)

1.5 in.

(3.8 cm)

2

5

6

1 - Side view
2 - Top view
3 - Alarm/Test LED

Table 1: Maximum Wire Length Allowed for

each Multiplex Bus

Wire Gauge

18 AWG (1.02 mm) 3800 ft (1170 m)
16 AWG (1.29 mm) 5950 ft (1810 m)
14 AWG (1.63 mm) 5950 ft (1810 m)
12 AWG (2.05 mm) 5950 ft (1810 m)

Table 2: Maximum Number of Detectors

Allowed for each Multiplex Bus

With Remote Test 40
With Remote LED 50
Without Annunciator 70

4 - Magnetic test locator
5 - Calibration voltage pins
6 - Tamper screw hole

Maximum 50 Ω for each

Bus Loop

3

4

Do not use shielded cable.

Do not exceed the maximum line resistance

of 50Ω.

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.

3.0 Wiring the D343

You can wire the D343 in series as shown in Figure 2.

Figure 2: Wiring the D343 Duct Housing

1

(-)

(+)

BBR

Y

O

LRE

E

R

KND

L

N

Tampe r
Disable

14 13 12 11 10 9

B

G

L

R

U

N

1

Reset
Disable

2
3
4
5
6
7
8

2

BBR

Y

O

LRE

E

R

KND

L

N

Tamper
Disable

14 13 12 11 10 9

B

G

L

R

U

N

Reset
Disable

1 - Input output module for the D7039 or DS9431
2 - Multiplex bus connections

4.0 Setting the Address

Set the D7050DH address before
connecting to the control panel and
applying power. The address number is the
same as the input point or zone number.

D7050DH | Installation Instructions | 3.0 Wiring the D343

The A address range works on the D7039
Multiplex Expansion Module with the
D7024 FACP. The B address range works
on the DS9431 Multiplex Expansion
Module with the DS9400M FACP.

Figure 3 shows the A address range set at 095, allowing

1

the D7039 to work with the D7024 FACP.

2
3
4
5
6
7
8

5.0 Mounting

1. Remove the tamper screw located in the recess

on the top of the dust cover.

2. Remove the dust cover.

3. Mount and wire the duct housing according to the

D343 Installation Instructions (P/N: 48199).

4. Mount the D7050DH to the base by turning it

clockwise until it clicks into place (Figure 4).

Figure 4: Mounting the D7050DH on the Base

1

Set the D7050DH’s address using a flat-blade
screwdriver to position the rotary switches
(Figure 3) located on the back. Note that the switches
click when turned.

The valid address range is from 009 to 255. Refer to
the D7024 Operation and Installation Guide (P/N: 31499)
or the DS9400M Reference Guide (P/N: 44578) for
additional address limitations.

Figure 3: Setting the D7050DH Address

A

0

1

2

0

1

B

2

0

1

9
8
7

6

2

3

4

5

0

1

9
8
7

6

2

3

4

5

1 2 3

1 - Hundreds 2 - Tens 3 - Ones
A = D7024 FACP, B = DS9400 FACP
For example:
0 hundreds, 9 tens, 5 ones = Address 95 on

the D7024 FACP

R2

+1

3-

2

1 - Base contacts (three sets)
2 - Set detector contact here and rotate clockwise

The detector is keyed. Do not force the
detector onto the base.

2

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