Extron Electronics FOX DA8 Plus User Guide - Manual (Page 12)

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RS-232 port — For serial control of the DA, connect a host device, such as a computer,
touch panel control, or RS-232 capable PDA, via this 3-pole captive screw connector (see
figure 3, below, to wire this connector).
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
Tx Rx
NOTE: Cross the Tx and Rx lines once between the source and the target.
RS-232
Figure 3. RS-232 Connector
NOTES: • The length of exposed wires is critical. The ideal length is 3/16 inches
(5 mm).
• If the stripped section of wire is longer than 3/16 inches, the exposed
wires may touch, causing a short circuit.
• If the stripped section of wire is shorter than 3/16 inches, wires can be
easily pulled out even if tightly fastened by the captive screws.
This port is RS-232 only, with the following protocols:
• 9600 baud • no parity • 8 data bits
• 1 stop bit • no flow control
FOX DA8 Plus • Installation and Operation 6