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Specifications for Setting Dip Switches
ON
1
2
3
4
At the time of purchase, setting is
made at OFF only for No.4 SW.
Host Port (RS-485/RS-232C)
RS–485
HOST PORT
6
5
4
3
2
1
GND
B
A
B
A
GND
OUT
IN
Note
Usage of the RS-485 port and the RS-232C port can differ according to the ON/OFF condition at the dip switch 4 set-
ting.
ON setting:
OFF setting: RS-232C only can be used (fixed).
Data Port
Straight
DATA PORT
6
5
4
3
2
1
GND
B
A
B
A
GND
OUT
IN
OFF (Upper) after the
No.3 dip switch setting
Note: Multiple units cannot be connected in a daisy
chain mode.
86
No.
Receive terminating resistance on trans-
1
parent side
Transmit terminating resistance on trans-
2
parent side
Send/receive pin wiring cross SW on trans-
3
5
6
parent side
4
Host port changeover switch
Receive terminating resistance switch on
5
host side
Transmit terminating resistance switch on
6
host side
RS–232C
HOST PORT
1 2 3 4 5
6 7 8 9
Using port changeover takes place according to the CD signal of the RS-232C.
•
Usage enabled on the RS-485 port when CD=OFF (including no connection).
•
Usage enabled on the RS-232C port when CD=ON.
Crossover
DATA PORT
6
5
4
3
2
1
GND
B
A
B
A
GND
IN
OUT
ON (Lower) after the
No.3 dip switch setting
Function
No.
Signal name
Name
Receiving carrier
1
CD
detection
2
RD
Receiving data
3
SD
Sensing data
4
ER
Data connector ready
5
SG
Signal ground
6
DR
Data set ready
7
RS
Request to send
8
CS
Send enabled
9
N.C.
Not used
Note
The data port wiring can be changed over between "straight" and
"crossover" by making ON/OFF switching at the No.3 dip switch set-
ting.
ON setting:
CROSSOVER
To be set at ON when used for our matrix switcher
connection.
OFF setting:
STRAIGHT
To be set at OFF when used for our SYSTEM CON-
TROLLER connection.
OFF
ON
Not terminated
Terminated
Not terminated
Terminated
Straight
Crossover
Exclusively for
Changeover mode
RS-232C
Not terminated
Terminated
Not terminated
Terminated
Direction as seen from AV20
Input
Input
Output
Output
–
Input
Output
Input
- Quick Links:
- Operating Instructions
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