Extron electronics FOXBOX Tx HDMI User Manual page 21

RS-232 connections
The Remote RS-232 port on the receiver only is for remote control of the receiver. The
RS-232 Over Fiber port on both units is for transmission of serial signals, such as projector
control signals, between the transmitter and receiver. See figure 9 to properly wire the
connectors.
REMOTE RS-232
RS-232 OVER FIBER
ALARM
Tx Rx Tx Rx 1 2
Ground (
Receive (Rx)
Transmit (Tx)
NOTE: Cross the Tx and Rx lines once between the source and the target.
Figure 9. RS-232 Over Fiber Connector
NOTE: The length of exposed wires is important. The ideal length is 3/16 inch (5 mm).
• Longer bare wires can short together.
• Shorter wires are not as secure in the connectors 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 10. Alarm Connector
NOTE: The length of exposed wires is critical (see the RS-232 connector NOTE above.)
Pin Function
TX Transmit data
RX Receive data
Gnd Signal ground
Do not tin the wires!
Bidirectional
)
FOXBOX Tx/Rx HDMI • Installation
Controlling
Device
Ground ( )
Receive (Rx)
Transmit (Tx)
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