Harman Martin VDO Fatron 20, User Manual

Page: 23 / 52

Physical installation 23
Parallel array of 320 mm fixtures
Warning! Do not use parallel couplers to support the weight of fixtures. Each 320 mm fixture must have its
weight supported by a sliding bracket.
To create an array of 320 mm VDO Fatron fixtures installed parallel to each other using parallel couplers:
1. You will need to install the following items on each fixture:
• One sliding mounting bracket (see “Sliding brackets” on page 15).
• One safety cable attachment bracket (see “Safety cable attachment” on page 15).
• Two parallel couplers.
You must fasten these items to the fixture either with the screws provided or with M6x10mm bolts and
self-locking nuts.
2. install brackets as shown in Figure 8 on page 18, but also install two parallel couplers, one on either side
of the sliding bracket in the center of the back of the fixture. Install the sliding bracket and safety cable
attachment bracket close to the center of the fixture and the parallel couplers close to the ends of the
fixture. Fasten the items to the fixture by tightening the screws provided or bolts.
3. If you are installing the array on a rigging truss or other structure, bolt a half-coupler type rigging clamp
(or a similar type that completely encircles the truss chord) securely to each sliding bracket. Fasten the
rigging clamps to a rigging truss or similar structure that can securely hold the weight of the array.
4. If you are installing the array on another type of structure or surface, pass bolts through each sliding
bracket and fasten the bolts to a structure or surface that can securely hold the weight of the array.
5. Secure each fixture against falling if a primary attachment fails by looping one approved safety cable per
fixture around a secure anchoring point, taking up as much slack as possible, then fastening the safety
cable to the attachment bracket.
A B C B A
Figure 13: An array of 1000 mm fixtures with parallel couplers
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