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Extron DTP HD DA4 4K 230/330 and DTP HD DA8 4K 230/330 • Installation and Operation 10
Wiring for RS-232 Control
RS-232 communication between the distribution amplifier and a host PC can be used to update
firmware or configure the unit using SIS commands (see Command and Response Table for
SIS Commands on page 16).
The computer connects to either the rear panel 3-pole RS-232 port (
K
on page 7) or the front
panel USB port (
B
on page 5) of the distribution amplifier.
NOTES:
• Neither port has precedence and commands from either port are handled in the
order they are received.
• Extron recommends that the USB port is used for temporary connections. If a
permanent connection is required, the RS-232 port should be used.
1. Connect an RS-232 cable to the computer, using a female 9-pin D connector (see figure 4):
z Data received by the computer = pin 2
z Data transmitted by the computer = pin 3
z Ground = pin 5
2. Wire the opposite end of the cable to the provided 3-pole captive screw plug (see figure4):
z Data transmitted by the DA plugs into the Tx (transmit) port
z Data received by the DA plugs into the Rx (receive) port
z Ground plugs into the G (ground) port
NOTES:
• The wiring in the RS-232 cables crosses over so that the Tx on the distribution
amplifier connects to the Rx of the control device and vice versa. Ground always
connects to ground.
• If the cable has a drain wire, tie the drain wire to the ground at both ends.
RS-232
Tx Rx G
REMOTE
TransmitReceive
ReceiveTransmit
GroundGround
DB9 Pin Locations
Female
51
96
Pin 2 = Rx
Pin 3 = Tx
Pin 5 = G
Computer
DTP HD DA4/DA8 230/330
Figure 4. Wiring the DTP HD DA4 and DA8 Series for RS‑232 Control