ACME LED-MTX36 HEX User Manual page 21

Mode connection 2‐2: (Four units in a group)
Termination reduces signal errors and to avoid signal transmission problems and
interference. It is always advisable to connect a DMX terminal.
Put a resistance (120 ohm 1/4W) between pin‐2 (DMX‐) and pin‐3 (DMX+) of the
last fixture.
1. At last unit, the DMX cable has to be terminated with a terminator. Solder a 120‐ohm 1/4W
resistor between pin 2(DMX‐) and pin 3(DMX+) into a 3‐pin XLR‐plug and plug it in the
DMX‐output of the last unit.
2. Connect the unit together in a "daisy chain" by XLR plug cable from the output of the unit to
the input of the next unit. The cable cannot be branched or split to a "Y" cable. DMX 512 is a
very high‐speed signal. Inadequate or damaged cables, soldered joints or corroded connectors
can easily distort the signal and shut down the system.
3. The DMX output and input connectors are pass‐through to maintain the DMX circuit, when
one of the units' power is disconnected.
4. Each lighting unit needs to have a DMX address to receive the data by the controller. The
address number is between 0‐511 (usually 0 & 1 are equal to 1).
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