
Active Components for RS-485 Networks
5-3
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Table 5-1
Description and Functions of the RS-485 Repeater
Layout of the Repeater
No.
Function
DC
24 V
L+ M PE M 5.2
À
10
À
Terminal for connecting the power supply of the RS 485
repeater (pin “M5.2” is the reference ground if you want to
measure the voltage between terminals “A2” and “B2”).
24 V
À
Á
10
Á
Shield clamp for strain relief and grounding the LAN cable of
bus segment 1 or bus segment 2
Â
Â
Terminal for the LAN cable of bus segment 1
Â
A1
B1
A1
B1
Ã
Terminating resistor for bus segment 1 )
1
Ã
Ä
È
A1
B1
A1
B1
PG
11
OFF
ON
DP1
Ä
Switch for OFF state
(= Disconnect bus segments 1 and 2, for example, during
commissioning)
Å
OP
DP2
12
Å
Terminating resistor for bus segment 2 )
1
SIEMENS
ON
Æ
Terminal for the LAN cable of bus segment 2
SIEMENS
RS 485-REPEATER
Æ
A2
B2 A2
B2
Ç
Catch for mounting and removing the RS-485 repeater on a
standard rail
Á
È
Interface for PG/OP on bus segment 1
Á
10
LED 24 V power supply
Ç
11
LED indicating bus activity on segment 1
12
LED indicating bus activity on segment 2
)
1
If the terminating resistor is activated, the right-hand bus attachment is disconnected (see
Figure 5-3) !
Note
Terminal M5.2 of the power supply (see Table 5-1, no.
À
) is used as the reference
ground for signal measurements if problems occur and must not be wired up.
Summary of Contents for SIMATIC NET PROFIBUS
Page 10: ...Contents viii PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 11: ...PROFIBUS NETWORKS 1 ...
Page 26: ...PROFIBUS NETWORKS 1 16 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 241: ...A 1 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 Testing PROFIBUS A ...
Page 254: ...Testing PROFIBUS A 14 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 288: ...Installing LAN Cables C 26 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 325: ...F 1 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 Dimension Drawings F ...
Page 338: ...Dimension Drawings F 14 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 396: ...Infrared Link Modul ILM 6ZB530 3AC30 0BA1 54 Copyright by Siemens ...
Page 434: ......
Page 438: ...Contents ii PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 Contents ...
Page 450: ...Network Topology 4 4 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 458: ...Installation and Startup 5 8 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 460: ...Troubleshooting 6 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 464: ...Technical Specifications 7 4 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 468: ...References 9 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 470: ...Abbreviations 10 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 478: ...References I 4 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 488: ...Glossary Glossary 8 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...