Connecting Rs232 Cable Of Com1; Usb - Thies CLIMA DLx-MET Instructions For Use Manual

5.3 CONNECTING RS232 CABLE OF COM1

The serial interface COM1 in RS232 mode is designed as "three-wire"-connection. The
transmission line (TxD) and the receiving line (RxD) are to be crossed in the cable.

5.4 USB

For the communication via USB it is required to have a VCP (Virtual COM Port) driver on the used
PC. Virtual COM port drivers cause the USB device to appear as an additional COM port available
to the PC. Application software can access the USB device in the same way as it would access a
standard COM port.
The driver is available from FTDI (FT245R):
In addition installation guides for several operating systems can be downloaded from there.
The USB cable between PC and datalogger is a common so-called AB-plug-cable.
PC/TERMINAL
cable
Sub-D25 (25 pins)
TxD 2
RxD 3
Ground 7
Both sides Sub-D9 (9 pins)
RxD 2
TxD 3
Ground 5
Table 8: Connections COM1 for RS232
Datalogger DLx
Sub- D9
2
3
5
2
3
5
http://www.ftdichip.com/Drivers
42 - 56
RxD
TxD
Ground
RxD
TxD
Ground
021579/06/09