Bosch D7042B, D7042 User Manual
D7042/D7042B Multiplex Eight Input Remote Modules
Installation Instructions
1.0 Introduction
These instructions cover the installation of the D7042/D7042B Eight Input Remote Modules in a fire system supervised
by an FPD-7024 Fire Alarm Control Panel (FACP).
Install, test and maintain the D7042/D7042B Eight Input Remote Modules according to their instructions, NFPA 72,
Local Codes and the Authority Having Jurisdiction. Failure to follow these instructions may result in failure of the
device to operate properly. Bosch is not responsible for improperly installed, tested or maintained devices.
These instructions contain procedures to follow in order to avoid personal injury and damage to equipment.
2.0 Device Description
The D7042/D7042B is an Eight Input Remote Module that provides a means of addressing up to eight input loops of
conventional contacts to the multiplex bus of the control panel. It is suitable for use with the FPD-7024 Fire Alarm
Control Panel (FACP) with ROM version 2.0 or greater using a D7039 Multiplex Expansion Module. Up to 30 D7042/
D7042B modules can be supported per FACP. One D7039 Multiplex Expansion Module is required in the system to
use the D7042/D7042B Eight Input Remote Modules.
3.0 Installing the D7042/D7042B
3.1 Mounting the D7042
Use the mounting holes (upper left and lower right corners) to mount the D7042. The D7042 normally is mounted
outside of the FACP enclosure.
Mounting Hole
Mounting Hole
Rear Wire Entrance
Surface Wire Entrance
Figure 1: Mounting the D7042
D7042/D7042B
Installation Instructions
3.2 Mounting the D7042B
The D7042B will come partially preassembled with the circuit board attached to the mounting skirt.
Select a mounting location for the D7042B.
Using the enclosure as a template, mark the mounting holes on the mounting surface and make an opening for the
unit’s wiring.
Next, attach the mounting skirt if applicable (with the circuit board attached) to the enclosure (hardware provided).
Then complete all wiring (see Section 4.0). Once installation and wiring is completed, attach the enclosure cover and
secure with the screws (provided).
Mounting Holes
Attach Mounting Skirt He re
Figure 2: Mounting the D7042B
Be sure all wiring is unpowered before routing. Do not use shielded or twisted pair cable.
Refer to the D7039 Installation Guide (P/N: 38685) for multiplex wiring requirements. The length of the wire connected
to the loop inputs on the D7042/D7042B must be less than 250 ft. (76 m) per loop. Route wiring as necessary from the
D7039 in the FACP enclosure and from remote devices to the D7042/D7042B. If the wiring is to run along the surface
of the enclosure, open the D7042/D7042B surface wire entrance. See Figure 2.
D7042/D7042B Installation Instructions
F01U 2 62 01 4- 0 1 Page 2 © 2011 Bosch Security Systems, Inc.
4.0 Wiring
Installation Instructions
Locking tab
P3
Tamper Switch
P2
+–+–12345678
POWER BUS
Rear Wire Entrance
Surface Wire Entrance
DIP switch
D7042/D7042B
Since NFPA 72 does not allow
redundant/duplicate ground paths,
do not connect wiring to the BUS (-)
terminal on this module for fire
applications. Only the BUS (+) needs
to be connected.
When used with a D7039, power is
connected to the option bus power
terminals (RA or RB (+), BA or BB (-)).
Connection t o 24 VDC sources will
damage the D7042/D7042B.
T o D7024 Opt io n Bus RA (or RB) terminal
T o D7024 Option Bus BA (or BB) terminal
To D7039 MUX
bus terminal
Figure 3: D7042/D7042B Front View without Cover
P2
+ –
+ –
POWER
BUS
1 2
NO NO
NC NC
47 k ohm
resistors
3 4
NO NO
NC NC
47 k ohm
resistors
EOL P/N: 28010
5 6
Figure 4: Wiring the D7042/D7042B
NO NO
NC NC
47 k ohm
resistors
7 8
NO NO
NC NC
47 k ohm
resistors
D7042/D7042B Installation Instructions
© 2011 Bosch Security Systems, Inc. Page 3 F01U262014-01
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