Kipp&Zonen COMBILOG Data Logger - Manual (Page 92)

10.5 Bus Plug
For installing the bus cable and the bus interface, 9-channel
D-sub miniature plugs and sockets are used. The pin assign-
ment for the RS485 connection according to PROFIBUS/MOD-
BUS specification is given in table 10.2.
plug Pin RS485-
notation
meaning
Profibus
meaning
Modbus
1
5
6
9
DB 9
1 Shield, protective
Ground
2 RP, Reserved for
Power
VP, positive 5...24 V
D.C. Power Supply
3 RxD/TxD-P, Receive /
Transmit Data-P
PMC, Port Mode Con-
trol
4 CNTR-P, Control-P
5 B / B´ DGND, Data Ground B/B´, transceiver ter-
minal 1, V1 voltage
( V1 > V0 für binary 1
[OFF state] )
6 VP, Voltage Plus
7 RP, Reserved for
Power
8 C / C´ RxD/TxD-P, Receive /
Transmit Data-N
C/C´, signal and power
supply common
9 A / A´ CNTR-N, Control-N A/A´ transceiver termin-
al 0, V0 voltage
( V0 > V1 for binary 0
[ON state] )
Table 10.2 Pin assignment D-sub miniature plug according to PROFIBUS /
MODBUS
Hardware Manual COMBILOG 1022 92