Jetter JC-120MC User Manual page 45

JC-120MC
Block diagram
Terminating resistor
Jetter AG
+3V3
33 kΩ
33 kΩ
+3V3
33 kΩ
33 kΩ
Number Part
1 Receiver
2 Receiver/transmitter
3
Serial line
4 R
T
Connect a terminating resistor to both serial lines in the following cases:
 Long lines
 High baud rates
Select a terminating resistor which corresponds to the impedance of the line
used.
Mechanical and electrical installation
X11.3 [RDB]
X11.1 [RDA]
X11.5 [SDB]
X11.7 [SDA]
Function in the case
of RS-422
Receives data
Transmits data
Twisted line of the serial interface
Terminating resistor
R R
T T
R R
T T
Function in the case
of RS-485
Unused
Receives and transmits
data
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