Setup – Blizzard Lighting BlockHead Matrix Moving Head User Manual

Page 8

Page 8

BlockHead™ User Manual Rev. B

3. SETUP

Fuse Replacement
With a Philips screwdriver, unscrew the fuse holder out of its housing and

remove the blown fuse from its holder. Replace the blown fuse with a

fuse of the exact same type and rating, then screw the fuse holder back

into place and reconnect power.

Connecting A Bunch of BlockHead™ Fixtures
You will need a serial data link to run light shows using a DMX-512

controller or to run shows on two or more fi xtures set to sync in master/

slave operating mode. The combined number of channels required by all

the fi xtures on a serial data link determines the number of fi xtures the

data link can support.

Fixtures on a serial data link must be daisy chained in one single line.

Also, connecting more than 32 fi xtures on one serial data link without the

use of a DMX optically-isolated splitter may result in deterioration of the

digital DMX signal.

The maximum recommended cable-run distance is 500 meters (1640 ft).

The maximum recommended number of fi xtures on a serial data link is

32 fi xtures.

Data/DMX Cabling
To link fi xtures together you’ll need data cables. You should use data-

grade cables that can carry a high quality signal and are less prone to

electromagnetic interference.

applications. Standard microphone cables will “probably” be OK, but note

that they cannot transmit DMX data as reliably over long distances. In

any event, the cable should have the following characteristics:

2-conductor twisted pair plus a shield

Maximum capacitance between conductors – 30 pF/ft.

Maximum capacitance between conductor & shield – 55 pF/ft.

Maximum resistance of 20 ohms / 1000 ft.

Nominal impedance 100 – 140 ohms