Extron electronics FOXBOX Tx VGA MM User Manual page 24

RS-232 Over Fiber connections
Figure 8 shows how to wire the RS-232 Over Fiber connector. This port is for transmission
of serial signals, such as projector control signals, between the transmitter and receiver.
RS-232 Pin
ALARM
OVER FIBER
TX
RX
Tx Rx 1 2
Gnd
Do not tin the wires!
Bidirectional
Ground ( )
Receive (Rx)
Transmit (Tx)
Figure 8. RS-232 Over Fiber Connector
NOTES:
• The Tx and Rx lines cross once between the source and target.
•
The length of exposed wires is important. The ideal length is 3/16 inch (5 mm).
• If the stripped section of wire is longer than 3/16 inch, the exposed wires may
touch, causing a short circuit.
• If the stripped section of wire is shorter than 3/16 inch, wires can be easily pulled
out even if tightly fastened by the captive screws.
• Do not tin the power supply leads before installing them in the connector. Tinned
wires are not as secure in the connector and could be pulled out.
Alarm outputs connection
RS-232
Pin 1 and pin 2 are
OVER FIBER ALARM
shorted together when
no light is detected.
Tx Rx 1 2
Do not tin the wires!
Figure 9. Alarm Connector
NOTE: The length of the exposed (stripped) copper wires is important (see the NOTES
above).
Function
Transmit data
Receive data
Signal ground
Controlling
Device
Ground ( )
Receive (Rx)
Transmit (Tx)
FOXBOX Tx / Rx • Installation and Operation 16