Yaskawa MP940 Hardware Manual - Manual (Page 27)

MotionSuite™ MP940 Machine Controller Hardware Manual Section 5: Communications
24
„ Connector pins and signal names of port 2
The MP940 has two internal terminating resistors that are connected to the positive
side of the signal. To terminate the signals, connect RXR and RX- together, as well as
TXR and TX- signals.
Pin
Signal
Name
Description Pin
Signal
Name
Description
1 TX+ + side of transmission
data 8 TX+ + side of transmission data
2 TX- - side of transmission data 9 TX- - side of transmission data
3 RX+ + side of received data 10 RX+ + side of received data
4 RX- - side of received data 11 TXR Transmission data
termination resistor
5 — — 12 — —
6 RX- - side of received data 13 VCC Power +5V
7 RXR Received data termination
resistor 14 GND Ground
PORT2
Terminal Resistor
RXR（+
）
RX（+）
RX（-）
TXR（+）
TX（+）
TX（-）
Figure 5.4: Internal Termination Resistors
RXR
RX+
RX-
TXR
TX+
TX-
Termination Resistor