Extron Electronics FOXBOX Tx_Rx HDMI User Guide - Manual (Page 19)

3. Place the LockIt lacing bracket on the screw and against the HDMI connector, then
tighten the screw to secure the bracket (
c ).
ATTENTION: Do not overtighten the HDMI connector mounting screw. The shield
to which it fastens is very thin and can easily be stripped.
4. Loosely place the included tie wrap around the HDMI connector and the LockIt lacing
bracket as shown (
d ).
5. While holding the connector securely against the lacing bracket, use pliers or similar
tools to tighten the tie wrap, then remove any excess length (
e ).
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 10 to properly wire the
connectors.
Do not tin the wires!
Controlling
Device
Ground ( )
Receive (Rx)
Transmit (Tx)
Ground ( )
Receive (Rx)
Transmit (Tx)
Bidirectional
Function Pin
TX
RX
Gnd
Transmit data
Receive data
Signal ground
ALARM
Tx Rx 1 2
RS-232
OVER FIBER
Tx Rx
REMOTE
RS-232
NOTE: Cross the Tx and Rx lines once between the source and the target.
Figure 10. RS-232 Over Fiber Connector
NOTE: The length of exposed wires is critical. 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
ALARM
Tx Rx 1 2
Pin 1 and pin 2 are
shorted together when
no light is detected.
Do not tin the wires!
RS-232
OVER FIBER
Figure 11. Alarm Connector
NOTES: The length of exposed wires is critical (see the RS-232 connector NOTE above.)
FOXBOX Tx/Rx HDMI • Installation and Operation 13