3 2
PCL-846/847 Series User's Manual
Termination resistor setup
You can install termination resistors if necessary for impedance
matching. The card has mounting spaces for termination resistors, but
no resistors are installed at the factory. Depending on your application
you may need to solder in a single resistor to handle the DATA+/
DATA- pair (and a corresponding resistor on the other end of the
connection). The value of the resistor should equal the characteristic
impedance of the signal wires (approximately 120 Ohms).
Termination resistors TR1 ~ 4 handle Port 1
Termination resistors TR5 ~ 8 handle Port 2
Termination resistors TR9 ~ 12 handle Port 3
Termination resistors TR13 ~ 16 handle Port 4
1
t
r
o
P
2
t
r
o
P
3
t
r
o
P
4
t
r
o
P
2
2
4
-
S
R
,
2
R
T
,
1
R
T
4
R
T
,
3
R
T
,
6
R
T
,
5
R
T
8
R
T
,
7
R
T
,
0
1
R
T
,
9
R
T
2
1
R
T
,
1
1
R
T
,
4
1
R
T
,
3
1
R
T
6
1
R
T
,
5
1
R
T
5
8
4
-
S
R
1
R
T
5
R
T
9
R
T
3
1
R
T
Содержание PCL-846 Series
Страница 1: ...PCL 846 847 4 Port RS 422 485 Interface Card ...
Страница 4: ......
Страница 5: ...1 Introduction C H A P T E R ...
Страница 8: ...4 PCL 846 847 User s Manual Figure 1 1 PCL 847 switch and jumper layout Card Jumper Layout ...
Страница 9: ...Chapter 1 Introduction 5 Figure 1 2 PCL 846 switch and jumper layout ...
Страница 10: ...6 PCL 846 847 User s Manual ...
Страница 11: ...2 Hardware Installation C H A P T E R ...
Страница 23: ...3 Software Installation C H A P T E R ...
Страница 33: ...C h a p t e r 4 Wiring C H A P T E R ...
Страница 37: ...Appendix A PC I O Address Assignments 33 A PC I O Address Reference A P P E N D I X ...
Страница 39: ...Appendix B Quick Reference 35 B Quick Reference A P P E N D I X ...
