Siemens SG-6048-01 manual Appendices, Appendix a Block Diagram

Appendices

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.

					Galvanically Isolated
					RS-485 Logic
		RS-232				RS-485
	25-pin D					Transceiver (4)
		Transceiver
	Connector						+
								RS-485
		3			Tx Enable		SHIELD
	RXD							Port 1
							-
	TXD	2
RS-232	RTS	4					+	RS-485
Connector					Tx Enable		SHIELD	Port 2
							-
		8
	DCD
	Signal	7					+
	Ground							RS-485
					Tx Enable		SHIELD
								Port 3
							-
							+	RS-485
					Tx Enable		SHIELD
							-	Port 4
			Tx
		Baud	Enable			Earth Ground
			Logic
		Switch
		RTS/DCD	AUTO/MAN	Opto-isolators
		RTS
		DCD	MAN	for each data
				channel
			AUTO
			5V
			Power Supply
				DC		Isolated
120 VAC/			5V			Supply
125 VDC					DC
Source
			15V		+	External 15V DC output
					-
			Earth Ground

Figure A.1. Block Diagram

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