Yaskawa MP940 Reference Manual - Manual (Page 103)

Serial Transmission Function MotionSuite™ MP940 Machine Controller Reference Manual
4-12
RS-485 Wiring
Enable the terminal resistor in the MP940 Port2 by connecting pin 2 to pin 11 and pin 4 to pin 7.
BAT
RDY
RUN
ALM
BAT
PRT1
6
5
4
3
2
1 NO →
PRT2
RUN
INIT
TEST
FLASH
PP
COPY
PORT1
PORT2
POWER
+24V
GND
FG
LED
I/O
TX
R
X
1
2
M
E
C
H
A
T
R
O
L
I
N
K
MP940
Terminal
Device
(PLC, etc.)
Terminal
Device
(PLC, etc.)
Terminal
Device
(PLC, etc.)
Terminal
Device
(PLC, etc.)
: 120 Ω Terminal Resistor
RS-485
MP940
120
Ω
Terminal
Resistor
TX／RX TX／RX TX／RX
1
TX（+）
2
TX（-）
11
TXR
3
RX（+）
4
RX（-）
7
RXR
3
SH
14
SH
FG
MP940 PORT2
FG
①
②
Shield
The following will result if,
for example, 217IF is
inserted.
120 Ω
Terminal
Resistor
SH TX
（-）
TX
（+）
RX
（-）
RX
（+）
SH
3 6 7 1 2 8
①
②
The following results when
an MP940 is connected as
a node.
SHIELD
GND
2 1 4 3