Hanna Instruments HI 504903 - Manual (Page 29)

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APPENDIX
SECTION 3: RS232 AUXILIARY PORT
HI504903 is provided with an auxiliary RS232 port (D-Sub
9-pole female plug) for connection to a local PC using an
HI920010 Hanna cable.
If the provided HI920010 Hanna cable is too short for your
application, it is possible to make a longer communication
cable (up to 15 m long) by following the below table for pin
connections.
PC side
female connector pin
2
3
4
5
6
HI504903 side
male connector pin
3
2
6
5
4
SECTION 1: CONNECTING THE HI142 NETWORK TO HI504903
For connecting the first HI142 datalogger to the HI504903
interface, make a cable for both RS485 and power supply
connections.
A 4-wire cable and an RJ11 jack (male connector) are neces-
sary, then follow the below diagram:
SECTION 2: CONNECTING HI142 TO HI142
For connecting one HI142 datalogger to the next one, make
a cable as explained on the below diagram, by using a 4-
wire cable and two RJ11 jacks (male connectors):