Table 9: SHoW DMX Radio for W-DMX Signal Descriptions
Pin
Type
Signal Name
Function
Notes
1
GND
GND
Signal Ground
2
O
DMX Data-
DMX Data-
3
O
DMX Data+
DMX Data+
4
I
GPI0
Link
5
O
Status LED
Status
6
VCC
VCC
Reg5Vdc
7
GND
GND
Signal Ground
8
+V
+V
Un-RegVdc
Max v30Vdc
9
NC
-
No Connection
10
I
Tx/Rx
Transmitter/Receiver Selection
Active High for Receiver
5.2.1
Description of Signal Pins
Pin 1 – DMX Common:
This pin is the DMX driver signal common. It is also the same as the
radio modules common.
Pin 2 – DMX Data-:
This pin is the data complement from the RS-485 driver.
Pin 3 – DMX Data+:
This pin is the data line from the RS-485 driver.
Pin 4 – GPI0:
This pin is used to invoke the SHoW ID linking function. When held low for .5s, the
radio module will start searching for a transmitter to link with if it was in Rx mode. Once linked,
the radio module will enter normal operation. If the radio module is in transmitting mode, the
radio module will transmit data packets for receivers to identify it as the transmitter to link to.
When you have linked all receivers to the transmitter, hold the line low again for .5s to return
to normal operation.
Pin 5 – STATUS LED:
This signal indicates operation status of the radio module. This signal
pulses as defined in Table 10.
Table 10: Status LED function
Event
Function
No DMX
900ms On/100ms Off
DMX Present
Solid
Linking
100ms On/100ms Off
Pin 6 - +5Vdc:
This pin is used to 5Vdc regulated power to the radio module.
Pin 7 – Gnd:
This pin is used for the circuit common.
