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C. RS-485 COMMUNICATION CONNECTION DIAGRAM
The PA7300 provide PA-C (METASYS/MODBUS protocol) and PA-P (PROFIBUS-DP protocol) option card
for RS-485 communication interface. The wiring diagrams of PA-C and PA-P are as below.
(a) PA-C METASYS/MODBUS protocol communication
The PA-C option card supports the METASYS/MODBUS protocol can be placed at the upper side
of the control board.
Fig. 15 Wiring for PA-C METASYS/MODBUS Protocol communication
Note: 1.
A Host Controller with RS-485 interface can communicate with the PA7300 unit through the
PA-C option card. If the Host Controller does not provide the RS-485 port and its RS-232 port
is available, an RS-485/RS-232 conversion card should be used to connect between this
Host Controller and PA-C option card of PA7300.
2.
A METASYS/MODBUS Host Controller can drive the network with no more than 31 drivers
connected, using MODBUS communication standard. If the driver (e.g., PA7300 drive) is at the
end of the network it must have the terminating resistors 220Ω at both terminals (By SW1
dip Switch). All other drives in the system should not have their terminating resistor active.
3.
The PA-C cards with RS-485 and RS-422 interface can be selected by TP1 jumper.
4.
Please refer to the “PA7300 PA-C RS-485 METASYS/MODBUS Communication Application Manual”.
App-8
PA 7300
APPENDIX
RS-485
interface
RS-485
Controller
220
(Terminator
Resistor)
PA7300
P
M31
(PA-C)
TB1
S+
S-
shield
X
X
X
SW1
TP1
RS-485
PA7300
P
M2
(PA-C)
TB1
S+
S-
shield
X
X
X
TP1
RS-485
PA7300
P
M1
(PA-C)
TB1
S+
S-
shield
X
X
X
TP1
RS-485
+
–
RS-232
Controller
Rx
Tx
DATA(+)
DATA(-) Rx
Tx
or
RS-485/RS-232
adaptor
RS-232
interface
Содержание PA7300 Series
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