86
Input
Input
Output
Output
–
Input
Output
Direction as seen from AV20
■
Specifications for Setting Dip Switches
ON
6
5
4
3
2
1
No.
1
2
3
4
5
Function
OFF
ON
Receive terminating resistance on trans-
parent side
Not terminated
Terminated
Transmit terminating resistance on trans-
parent side
Not terminated
Terminated
Send/receive pin wiring cross SW on trans-
parent side
Straight
Crossover
Host port changeover switch
Receive terminating resistance switch on
host side
Exclusively for
RS-232C
Changeover mode
Not terminated
Terminated
6
Transmit terminating resistance switch on
host side
Not terminated
Terminated
At the time of purchase, setting is
made at OFF only for No.4 SW.
No.
1
2
3
4
5
Signal name
Name
CD
Receiving carrier
detection
RD
Receiving data
SD
Sensing data
ER
SG
Data connector ready
Signal ground
6
DR
Data set ready
7
RS
Request to send
8
CS
Send enabled
9
N.C.
Not used
Input
■
Host Port (RS-485/RS-232C)
RS–485
RS–232C
GND
A
B
A
B
GND
OUT
IN
HOST PORT
HOST PORT
1
1 2 3 4 5
6 7 8 9
2
3
4
5
6
■
Data Port
DATA PORT
DATA PORT
GND
A
B
A
B
GND
1
2
3
4
5
6
GND
A
B
A
B
GND
1
2
3
4
5
6
OUT
IN
OUT
IN
Straight
Crossover
ON (Lower) after the
No.3 dip switch setting
OFF (Upper) after the
No.3 dip switch setting
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:
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.
OFF setting: RS-232C only can be used (fixed).
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.
Note
Note:
Multiple units cannot be connected in a daisy
chain mode.