GB
Temperature Dry Well Calibrators/Micro Calibration Baths
CTD9100/CTB9100
11263911 04/2007 GB/D
WIKA Operating Instructions Temperature Dry Well Calibrators/Micro Calibration Baths
10
4. Data interface
The S version is equipped with a serial communica-
tion interface RS-485. It is possible to connect a
PC, a level converter or a network via this interface.
The utilized software protocol is a MODBUS-RTU
protocol, which is used in numerous market-avail-
able monitoring programs.
The transfer rate (baud rate) is factory set to 9600
baud. Other transfer rates are available on request.
The 5-pole socket is provided with two connections,
A and B, which have to be connected to the
respective sockets of the PC, the level converter or
the network.
To enable connection to a PC, the RS-485 signals
have to be externally converted into RS-232 or USB
signals. Appropriate converters including drivers
are optionally available. The PC records all the
operating data and enables the programming of all
the calibrator’s configuration parameters.
The minimum requirements for operation with a
USB converter are:
IBM compatible PC,
An instalLED Windows operating system
98SE, ME, 2000 or Windows XP (Home or
Professional),
A free USB port (USB 1.1 or USB 2.0).
Fig. 6: Top view of the 5-pole socket
A network configuration allows the connection of up
to 32 calibrators/micro calibration baths to the same
network.
Certain factory settings have to be carried out to
enable configuration of a network. In this case,
please contact your supplier or WIKA directly.
If you access the programming via the
keypad while communication via a
serial interface is running, the message
“buSy“
appears on the display.
4. Transmission protocol
The transmission protocol is supplied as an
additional document upon request.
Fig. 7: Network configuration
