7.6 Termination Resistors
No termination resistors are provided on the ports. Both output and input signals are connected only to the external connector. Any termination which is required must be added externally.
+RXD+
Rt
-RXD-
+AUXIN+
Rt
-AUXIN-
Recommended Termination Resistor Values
100 ohm 1/2W resistor | 60 ohms total resistance |
| (120 ohms at each end) |
Figure 21. RS-422/485 Termination
Quatech | 37 |
