Physical installation
15
Preparing for installation
This section explains how to prepare VDO Fatron fixtures by fastening mounting accessories (brackets,
clamps, etc.) to fixtures. For instructions on installing fixtures after they have been prepared, see “Mounting
fixtures on a structure or surface” on page 20.
Captive Fasteners
A channel for M6 fasteners (bolt heads or nuts) is
provided in the profile on the back of VDO Fatron
fixtures.
Note that there is only one cutout in the channel,
so you must insert fasteners one after the other in
the correct order to locate the accessories
correctly!
See Figure 3. To fasten brackets etc. to a fixture,
pass each fastener through the cutout next to the
cable tail and slide it into the channel. The channel
holds the fastener captive so that you can tighten
against it.
Safety cable attachment
Safety cable attachment brackets with fasteners are supplied with fixtures. If you install a VDO Fatron fixture
in a location where it may cause injury or damage if it falls, you must install a safety cable bracket in the
center of the back of the fixture and secure the fixture with an approved safety cable (or other approved
secondary attachment) that will prevent the fixture from falling if the primary attachment fails.
To install a safety cable attachment bracket and safety cable:
1. Place the fixture with the LEDs facing downwards on a surface that
will not scratch or damage the fixture.
2. Make sure that you know which brackets and couplers are required.
You must install these in the correct order.
3. To install the safety cable attachment bracket, pass a captive nut
through the cutout shown in Figure 3 on page 15 and into the channel
in the back of the fixture. Slide the nut along the channel to the center
of the fixture.
4. See Figure 4. Tighten the supplied Torx bolt into the nut to a torque of
8 Nm so that the safety cable attachment bracket is held securely.
5. Obtain a safety cable that is approved as a secondary attachment for
the weight it will secure. Pass the safety cable through the bracket on
the fixture. Each fixture must have its own safety cable.
6. As soon as you have fastened the fixture in the installation location,
pass the safety cable through a secure anchoring point. Arrange the
safety cable so that it as tight as possible: there must be a maximum
10 cm (4 ins.) slack in the cable. Then fasten the cable closed so that
it will catch the fixture if a sliding bracket or other primary attachment fails.
Sliding brackets
Sliding brackets for the VDO Fatron allow you to suspend fixtures by fastening them to rigging trusses, other
structures or stable surfaces. M12 bolts can be passed through the bracket and into rigging clamps or
supporting structures. We recommend use of one of the Half-Coupler Rigging Clamps available from
Martin® (see “Accessories” on page 47).
Sliding brackets and safety cable brackets must be installed as shown in Figure 2 on page 13:
• Each 1000 mm fixture must be supported by at least two sliding brackets located at each end of the
fixture, close to the fixture’s cable tails.
• Each 320 mm fixture must be supported by at least one sliding bracket located in the center of the fixture.
• Each fixture that is installed in a location where it may cause injury or damage if it falls must also be
secured by a safety cable located in the center of the fixture.
Figure 3: Inserting a bolt head or nut into the
channel in a fixture
Figure 4: Safety cable
bracket
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Summary of Contents for Martin VDO Fatron 20
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