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Connection
6.5 Connecting to the RS 485 bus
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01
49
RS 485 terminal block
COM
Common = Ground
+/B
B signal; D1
-/A
A signal; D0
Figure 6-11 RS 485 terminal block
Block diagram
7(5
7(5
'
5
6ODYH
'
5
6ODYHQ
%DODQFHG3DLU
'
'
'
5
0DVWHU
9
SXOOXS 38
SXOOGRZQ 3'
%
$
&RPPRQ
TER
Bus termination resistor (termination)
PU
Pull-up resistor
PD
Pull-down resistor
(1)
Grounding of the cable shielding
(2)
Grounding of the common line, preferably only at one point for the whole bus
Figure 6-12 Block diagram: General RS 485 topology
Summary of Contents for SENTRON PAC3100
Page 10: ...Table of contents SENTRON PAC3100 10 Manual 07 2009 A5E02385159B 01 ...
Page 38: ...Mounting 5 3 Deinstallation SENTRON PAC3100 38 Manual 07 2009 A5E02385159B 01 ...
Page 104: ...Service and maintenance 10 5 Disposal SENTRON PAC3100 104 Manual 07 2009 A5E02385159B 01 ...
Page 118: ...Dimensional drawings SENTRON PAC3100 118 Manual 07 2009 A5E02385159B 01 ...
Page 142: ...Appendix A 3 Correction sheet SENTRON PAC3100 142 Manual 07 2009 A5E02385159B 01 ...
Page 146: ...List of abbreviations C 1 Abbreviations SENTRON PAC3100 146 Manual 07 2009 A5E02385159B 01 ...
Page 148: ...Glossary SENTRON PAC3100 148 Manual 07 2009 A5E02385159B 01 ...
Page 152: ...Index SENTRON PAC3100 Manual 07 2009 A5E02385159B 01 152 ...