Omega Engineering OMR-6520, OMR-6510 manual Functional Block Diagram

Functional Block Diagram

		+5V
	Power Regulator					Isolation +5V
	& Filter					Isolation GND
Power Input		GND
				DC to DC
+10V ~ +30V				Converter
			SW1		TVS	PTC
TXD					RS-422/RS-485	Data+
	RS-232					Data-
RXD			Communication		Receiver/Driver
	Receiver					Rx+
RTS			Switching
	/ Driver
			Controller			Rx-
GND		Opto-Isolation				Tx+
			Communication			Tx-
			Direction Control
	TVS : Transient Voltage Suppresser
	PTC : Positive Temperature Coefficient

OMR-6520 2-5