Physical Connection Of The Rs-232 And Rs-485 Interface - WEG CFW-09 User Manual

8.13.7 Physical Connection
of the RS-232 and RS-485
Interface
Network
Master
(PC, CLP)
RS-485
A
B
Figure 8.49 - CFW-09 network connection through RS-485 Serial Interface
Notes:
LINE TERMINATION: include line termination (120 ) at the ends. So set
S3.1/S3.2 (EBA) and S7.1/S7.2 (EBB) to "ON" (refer to items 8.1.1 and
8.1.2);
GROUNDING OF THE CABLE SHIELD: connect the shielding to the
equipment frame (suitable grounding);
RECOMMENDED CABLE: for balanced shielding.
Ex: AFS series from KMP;
The RS-485 wiring must be laid separately from the power and control
cables in 110/220 V.
The reference signal for the RS-485 interface (SREF) shall be used when
the network master is not connected to the system/installation ground.
For instance, if the master is powered from an isolated power supply it is
necessary to ground the power supply reference or carry this reference
signal to the whole system.
In general, it is possible to connect only signals A (-) and B (+), without
connecting the signal SREF.
RS-232 Serial Interface Module
The RS-232 interface is available for the CFW-09 through the module presented
in item 8.6.
Figure 8.50 - Description of the XC7 (RJ12) connector
CHAPTER 8 - CFW-09 OPTIONS AND ACCESSORIES
CFW-09 CFW-09
Board Board
EBA or EBA or
EBB EBB
A B
XC4
XC5
1 1
(EBA) 1 2
(EBB)
A
B
Shield
B A
cable
Shield cable
XC7 RS-232
1 6
5 V TX
2 5
0 V
3 4
0 V RX
CFW-09
Board
EBA or
EBB
A B
XC4
1 1 XC5
12
(EBA)
(EBB)
A
B
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