Extron Electronics CTL208CM - Manual (Page 12)

CTL208CM Control Panel Module • Installation CTL208CM Control Panel Module • Installation
Installation, cont’d
1 Serial port connector — This port is a 3.5 mm, 5-pole captive
screw connector for serial RS-232, RS-422, or RS-485
communications. Connect to the port as shown in figure 2-7.
The port serves two functions:
• Connects the control panel module to a computer to
program the module’s buttons.
• Connects the control panel module to the device to be
controlled, such as a projector or switcher.
Pin # Pin #
Pin #
GND TX- TX+ RX- RX+
GND
GND
TX-
TX+
RX-
RX+
Computer Serial
Port (DB-9)
Half duplex RS-485
1
5
6
2
7
3
GND TX- TX+ RX- RX+
GND
TX
RX
Computer Serial
Port (DB-9)
RS-232
GND TX- TX+ RX- RX+
GND
GND
TX-
TX+
RX-
RX+
Computer Serial
Port (DB-9)
Full duplex RS-422/485
1
5
6
2
7
3
5
3
2
Figure 2-7 — Serial port pin assignments
RS-485 implementation may vary between computers or
control systems. Connect the control cable as shown in
figure 2-7. If the serial communications link with the
control panel module switcher does not work, try
reversing the polarity of the TX and RX signal lines.
2 Serial port configuration DIP switches —
DIP switch 1 configures the control panel module’s serial port to
operate as RS-232, RS-422, or RS-485. DIP switches 2 and 3 are
used to terminate the RX and TX lines when the control panel
module is at the end of a line of serial devices. The table below
defines the switch positions.
Switch Function
On (1) On (1) 1 Serial mode
RS-485
position
RS-422
position
2 Rx
termination
On (1)*
or Off (0).
On (1)*
or Off (0).
On (1) if full duplex*
or Off (0) if half duplex.
3 Tx
termination
Off (0)
Off (0)
Off (0) Off (0)
RS-232
position
* If the CTL is the last unit in a daisy chain.
The default settings for all switches for an RS-232
connection is off (0).
DIP switch 3 should be turned on for an RS-485 full
duplex connection only, and only if the CTL is the first
or last unit in a daisy chain.
DIP switch 5 is a factory reset control. See Factory Reset in
chapter 3, Operation.
3 Captive screw power connector — Power the control panel
module one of two ways:
• Connect the control panel module to a device with
auxiliary 12VDC outputs, such as an Extron MSV0502-3 or
MSV0804-3 matrix switcher. Figure 2-8 shows how to wire
the power connector.
• Connect the included 12VDC external power supply to the
2-pole female direct insertion captive screw connector.
Figure 2-8 shows how to wire the power connector.
Power Supply
Output Cord
A A
SECTION A–A
Figure 2-8 — Power connector wiring
Do not tin the stripped power supply leads before
inserting them into the captive screw connector. Tinned
leads are not as securely attached as untinned leads and
could slip out.
The two power supply leads must be kept separated
while the power supply is plugged into an electrical
outlet. Remove power before wiring.
To verify correct polarity before connection, check the power
supply’s no load output with a voltmeter.
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