Gilderfluke&Co DMX-512 Input DC Dimmer - Manual (Page 9)

3) ! Buffered DMX-512 Out:
If DMX-512 needs to be run to additional downstream DMX-512 devices, the two standard DMX-512
connections (‘data +’ and ‘data -’) are attached to these terminals, along with (optionally) the wire shield.
The DMX-512 received through the DMX-512 In/Out terminals will be buffered and retransmitted on these
terminals. If the Lg-DMX/DC is not powered up, then the signals applied to the DMX-512 In/Out terminals
will NOT be retransmitted.
If the DMX-512 is buffered through the Ld-DMX/DC, these terminals will form the beginning of a new
DMX-512 daisy chain. If the wire runs are long, you may need to add a 120Ω (typically) termination resistor
to the two extreme ends of the DMX-512 daisy chain.
4) ! Outputs:
The eight output loads are attached to these terminals. If you are attaching incandescent lamps or
other non-polarized loads, you don’t need to worry about the ‘+’ and ‘-’ markers on each output. If you are
controlling motors, LEDs, or other polarized loads, you will need to wire the positive lead to the ‘+’ terminal,
and the negative lead to the ‘-’ terminal. Each output is protected by a flyback diode for driving inductive
loads.
The outputs act like circuit breakers. When they are overloaded, they open up the circuit. When the
short is removed, they return to normal operation. Short term ‘hard’ shorts should be avoided on the out-
puts, as the surge can damage the output HEXFETs before the circuit breakers have a chance to open.
The output HEXFETs are conservatively rated at ten amps. You can easily control ten amp loads on as
many as four outputs simultaneously. The continious current load on the Lg-DMX/DC should not exceed
forty amps. This is the current rating for the power screw terminals.
If you need additional current capacity or higher voltages must be controlled, you can use the Lg-DMX/
DC outputs to drive larger off-board DC solid state relays. These are available with current capacities of 40
amps or more, with voltage capacities into the hundreds of volts.
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-50/xx Manual / September 10, 2012 9:58 AM / page 9 of 12