PRG DMX Reference Guide 5.4 - Manual (Page 66)

58 DMX512 REFERENCE GUIDE
Adjustable Coupling Plate
The most widely used device for extra support is the adjustable coupling plate. The adjustable coupling plate provides
a third point of support. The hook can be moved along a slot in the plate to accommodate trusses with 12- to 28-inch
centers. The hook can also be rotated through 360 degrees to mate with cross braces at any angle. A special hook
used with the adjustable coupling plates utilizes a bolt welded in place of the truss hook fastener. This hook is secured
to the coupling plate by a lock washer and nut.
Figure 3-7: Coupling Plate
The adjustable coupling plate can be installed in two locations on VL2C and VL4 luminaires. This limits the overhang
of the coupling plates from the truss, thereby reducing the hazard when moving the truss during installation and
removal.
Series 200 Vertical Hang
In some cases it is necessary to hang the luminaires vertically. In such a case, the luminaire is hanging on its side with
the yoke parallel to the stage. This puts more stress on the yoke and the truss hooks than a normal, horizontal hang.
A three-point hang is absolutely necessary for vertical hangs, whether or not the truss moves during the show. When
hanging a VL2C luminaire in a vertical hang position, make sure that the luminaire is hung so that the fan drive board
is not at the lowest point of the hang. This will prevent rain water or heavy condensation from collecting around the
bottom of the luminaire (where the board would be located) and causing possible luminaire overheating.
Figure 3-8: Vertical Hang
27.99 in
11.99 in
34.00 in
864 mm
711 mm
305 mm
UP
FAN
INPUT
DRIVE
BOARD
CONNECTOR
INCORRECT
VERTICAL HANG
CORRECT
VERTICAL HANG