Rush MH-3 Beam User Manual download pdf (Page 12)

12 RUSH MH 4 Beam User Manual

DMX data link

A DMX 512 control data link is required in order to control the fixture via DMX. The

fixture has 3-pin and 5-pin XLR connectors for DMX data input and output

(throughput).

The number of daisy-chained fixtures is limited by the number of DMX channels

required by the fixtures in relation to the maximum 512 channels available in one

DMX universe. Note that if independent control of a fixture is required, it must

have its own DMX channels. Fixtures that are required to behave identically can

share the same DMX address and channels. To add more fixtures or groups of

fixtures when the above limit is reached, add a DMX universe and another daisy-

chained link.

Note that if a fixture loses its DMX signal it will maintain its current effect until

powered off or reset.

Tips for reliable data transmission

Use shielded twisted-pair cable designed for RS-485 devices: standard

microphone cable cannot transmit control data reliably over long runs. 24 AWG

cable is suitable for runs up to 300 meters (1000 ft.). Heavier gauge cable and/or

an amplifier is recommended for longer runs. The pin-out on all connectors is pin

1 = shield, pin 2 = cold (-), and pin 3 = hot (+). Pins 4 and 5 in the 5-pin XLR

connectors are not used in the fixture but are available for possible additional data

signals as required by the DMX512-A standard. Standard pin-out is pin 4 = data 2

cold (-) and pin 5 = data 2 hot (+).

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Rush MH-3 Beam User Manual Page 12