12 Controller operation Atomic 3000 user manual
C
ONTROLLER
OPERATION
4
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 3-pin or
5-pin input (male) socket.
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).
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