Checkline J-CC - Manual (Page 3)

Two different types of OPTO-RS plug connections are available: Simplex and Duplex
Simplex cable
First generation of OPTO-RS cable connection, designed for instruments which were not able to receive RS232
commands. Data requests are made by LED status change (e.g. by turning off the DTR signal line for a
minimum of 110ms). The OPTO-RS simplex cable can also be used with duplex instruments, however remote
commands will be ignored.
The simplex cable can be directly connected to any standard program as "HyperTerminal" provided with
Windows.
Connections
Line definition Name Sub-D 9 pin Cable color Line status
Positive power supply : RTS 7 white ON (HIGH)
Negative power supply TXD 3 brown OFF (LOW)
Data (instrument to periphery) RXD 2 yellow INPUT
Data request: Standard status Data
request DTR 4 green
ON (HIGH) OFF (LOW) during
min. 110m sec.
Duplex cable
The duplex cable allows a 2-way communication between an instrument and a PC in half-duplex mode (e.g. 2-
way communication but not simultanuously).
Important : Only Duplex instruments have the ability to receive RS232 commands. If you use a Duplex cable
with a simplex instrument, all commands other than "?" will be seen as a data request.
The pin assignment of a duplex cable is different to the one of a simplex cable.
Connections
Line definition Name Sub-D 9 pin Cable color Line status
Positive power supply : DTR 4 white ON (HIGH)
Negative power supply RTS 7 brown OFF (LOW)
Data (instrument to periphery) RXD 2 yellow INPUT
Data request: TXD 3 green "?" + <CR>
Note :
In case of data sending from the instrument, the hold mode will be active. To disable the Hold
mode simply do a new data request.
Remote commands
Format
[¦ C1-Cn ¦ { S1-Sn } ¦ CR ]
C1-Cn: command of 2 to 3 characters
S1-Sn: 0/1 : command disabled/activated
? : status request
+XXX.YYY: entering numerical values