8 | RPT 301 User Manual |
Communications
The installed instrument is controlled by the serial data interface. Software or hardware handshaking can be used on the RS232 interface and only software handshaking on the RS485 interface.
Changing the communication interface standard (Figure 2-3)
The communication interface standard is set at manufacture to RS232 but can be changed as follows:
Remove the lid of the instrument to gain access to the PCB.
CAUTION:
THE PCB CONTAINS SENSITIVE ELECTRONIC COMPONENTS.
Carefully connect the interface connector lead and the link LK2 in the following positions:
RS232 |
|
interface lead to PL1 | RS485 |
LK2 to position A | interface lead to PL3 |
| LK2 to position B |
Refit and secure the lid of the instrument.
