Module USB - DMX512
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Page 5
Connection of the DMX512 cable
When connecting longer cables, it is necessary to use a terminator (for
impedance adaptation of the wiring) at the end of the wiring. Terminator is 120
Ohms resistor, ¼ W connecting pins 2 and 3 on the XLR connector socket
(DATA+ to DATA-). Resistor can be soldered in to the XLR socket and
connected to the last DMX unit. This lowers the probability of unexpected
behavior of units.
Some manufactures use 5-pin XLR DMX connector for data transfer
instead of a 3-pin one. Standard 5-pin XLR connector can be implemented into a
3-pin one using cable adapter. Connection of pins for a 5 and 3-pin XLR
connector is shown in the following table.
Conductor
3-Pin XLR Female
5-Pin XLR Male (In)
Shield / Ground
Pin 1
Pin 1
Data Compliment (- signal)
Pin 2
Pin 2
Data True (+ signal)
Pin 3
Pin 3
Not Used
Do Not Use
Not Used
Do Not Use
Connection of the XLR connector