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Chapter 9 • Connection and parameterisation
9
Connection and parameterisation
In this chapter the basic connection of the Automatic Purging Unit F-BO-AFE70 to an aspirating
smoke detector is described.
Beware of static charges! The electronic components used in the Automatic Purging Unit
F-BO-AFE70 can be destroyed by static charges when the device is open. Before and during the
work being performed on printed circuit boards, static charges from your body must be reliably
discharged by touching an earthed piece of metal.
9.1
General instructions
You have to size the wire gauges of the connection cables to the external components, taking into
consideration the current consumption of the connected equipment as well as the length of the
cables. When dimensioning the cables, do consider the voltage drop which, in the event of actu-
ation, is briefly caused by the solenoid valve current (see from page 43 onwards in Chapter 12:
„Specifications"). To ensure adequate mechanical strength, the wire diameter should not drop
below 0.6mm for the connection of external components.
Fig. 10:
Connection of the cables on the control board of the F-BO-AFE70
Left:
Right:
A ... strain relief on the bottom plate
B ... cable grommets for the external cables
C ... cable grommet for the connection to the solenoid valve (already connected at the factory)
You have to thread the cables through the two cable grommets in order to connect them to the con-
trol board. In the Purging unit, the laid cables must be pull-relieved. On the bottom plate there is a
deep drawn loop that is intended for pull-relieving the inserted cables (see Fig. 10 above) by fasten-
ing them to this loop – using a cable tie (included in the packet of assembly material that is
enclosed with the Purging unit).
Please note that the protection class will only be achieved if all incoming cables are threaded
through the cable grommets in such a way that the seal is tight.
If shielded cables are used for the installation, the shielding wires must be connected to earth on
one side. The shielding wires of an interrupted line (e.g., in an intermediate distributor) must be
safely connected with each other.
The Automatic Purging Unit F-BO-AFE70 is protected against electrical interference using elab-
orate means. As a result, under normal environmental conditions, shielded cables are not needed
for safe operation.
Observe the regional installation regulations for fire alarm systems as well as the relevant regula-
tions for electrical installations!
Only turn on the compressed-air supply after finishing all mounting, installation, connec-
tion and parameterisation work in the course of commissioning, as described starting on
page 40 in Chapter 10: „Commissioning and function test". Turning on the compressed-air
Strain relief
Cable grommets and control board
User Manual Series F-BO-AFE70
I56-4252-010
D200-104-00
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