Termination Resistors - Quatech DSCLP-200 User Manual
Two and one channel rs-422/485 low profile asynchronous communications adapter for pci bus
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- User manual (40 pages) ,
- User manual (38 pages) ,
- Specifications (2 pages)
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7.6 Termination Resistors
Line termination resistors are provided for the input signals of each of the
DSCLP-200/300's RS-422/485 ports. Termination may be selected or removed
for individual signal lines using jumper blocks J6-J9.
RS-422/485 Receiver
4
2
3
1
no termination
Figure 21 --- RS-422/485 Line termination resistance values
DSCLP/SSCLP-200/300 User's Manual
RS-422
RS-485
+
Rt
-
Jumpers J6-J9
4
2
3
1
RS-422 termination
(100 ohms)
(factory default)
Rt = 100 ohm 1/2W
Rt = 120 ohm 1/2W
RXD+
AUXIN+
or
RXD-
AUXIN-
4
2
3
1
RS-485 termination
(120 omhs)
43
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