•
Connector:
D-sub connector 9-pin
Connection: RS-232C RS-485 (Data transfer rate: 2400, 4800, 9600, 19200bps)
(Fig.2-2)
Shield wire
Connect only one side of the shield wire to the FG or GND terminal so as not to allow current to
flow into the shield section.
If both sides of the shield section are connected to the FG or GND terminal, closed circuit will be
made between the shield wire and the ground.
As a result of this, current will run in the shield wire and
the current may cause noise.
Never fail to ground FG or GND terminal.
Terminator
Do not connect terminator onto the communication line, because each of the JCS-33A, JCR-33A
and JCD-33A has a built-in terminator.
IF-300-C5 (sold separately) is available as a communication converter.
3. Setting the instruments
•
It is necessary to set the instrument number individually to the instruments when plural
units are connected in serial communication (Option: C5).
Select the data transfer rate of the JC series in accordance with that of the host computer.
•
Refer to the
JCS
-33A, JCR-33A and JCD-33A instruction manual as for instrument number setting
and transfer rate selection.
RXD
TXD
DCD
DTR
DSR
RTS
CTS
2
3
5
1
4
6
7
8
Host computer
D-sub connecter 9-pin
(6)
(7)
(8)
(14)
(15)
(16)
YA(-)
YB(+)
COM
RX
TX
COM
IF-300-C5
Built-in terminator 120
GND
RI
9
Shield wire
JCS-33A
RS-232C
RS-485
Shield wire
(13)
YB(+)
YA(-)
COM
(14)
(15)
(13)
YB(+)
YA(-)
COM
(14)
(15)