Appendix A: Block Diagram - Siemens ISOLATED MULTI-DROP SG-6048-01 Operator's Manual

Appendix A: Block Diagram

The illustration below is a block diagram showing how the Isolated Multi-Drop converter operates.
The diagram identifies the internal components that make up the converter.
25-pin D
Connector
3
RXD
2
TXD
RS-232
4
Connector RTS
8
DCD
7
Signal
Ground
120 VAC/
125 VDC
Source
Figure A.1. Block Diagram
Siemens Energy & Automation, Inc.
RS-232
Transceiver
Tx
Enable
Baud
Logic
Switch
RTS/DCD
AUTO/MAN
RTS
MAN
DCD
AUTO
Power Supply
5V
15V
Earth Ground
Galvanically Isolated
RS-485 Logic
RS-485
Transceiver (4)
Tx Enable
Tx Enable
Tx Enable
Tx Enable
Earth Ground
Opto-isolators
for each data
channel
5V
Isolated
DC Supply
DC
+
External 15V DC output
-
Appendices
+
RS-485
SHIELD
Port 1
-
+
RS-485
SHIELD
Port 2
-
+
RS-485
SHIELD
Port 3
-
+
RS-485
SHIELD
Port 4
-
13