User guide

Page 7

3. SETUP

Fuse Replacement

CAUTION! The SnowBank™ utilizes a high-output switch-mode power

supply with an internal fuse. Under normal operating conditions, the

fuseshouldnotrequirereplacement.Thefuseiseldreplaceable,

howeveritisanadvancedproceduresuitedtoqualiedindividuals.

ShouldyourSnowBank™fuserequirereplacement,pleasecontact

Blizzard Lighting for instructions, or to return your unit for service.

Connecting A Bunch of SnowBank™ 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xturessettosyncin

master/slave operating mode. The combined number of channels

requiredbyallthexturesonaserialdatalinkdeterminesthenumber

of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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xturesonaserialdata

linkis32xtures.

Data/DMX Cabling

Tolink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.

485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