Controller Operation - Martin Atomic 3000 User Manual

Controller operation

This section describes how to operate the Atomic 3000 with a DMX
controller.
Data connection
The Atomic 3000 provides both 3-pin and 5-pin XLR sockets for data
connection. The pin-out on all sockets is pin 1 to shield, pin 2 to cold (-),
and pin 3 to hot (+). There is no connection to pins 4 and 5. The sockets
are wired in parallel: both inputs connect to both outputs. For reliable data
transmission use one input and one output!
To connect the data link:
1. Connect the DMX data input from the controller to the Atomic 3000's
2. Connect up to 31 additional fixtures output-to-input.
3. Insert a termination plug in the output of the last fixture on the link.
Data connection tips
• 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.). Use
heavier gauge cable and/or an amplifier for longer runs.
• Never use both outputs to split the link. To split the serial link into
branches use a signal splitter.
• Do not overload the link. Up to 32 devices may be connected on a serial
link.
• Terminate the link by installing a termination plug in the output socket of
the last fixture. The termination plug, which is a male XLR plug with a
120 ohm, 0.25 watt resistor soldered between pins 2 and 3, "soaks up"
the control signal so it does not reflect and cause interference.
• Use a phase-reversing cable to connect older Martin fixtures with
reversed polarity sockets (pin 3 cold).
Atomic 3000 user manual
3-pin or 5-pin input (male) socket.
Controller operation
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