Telenetics DSP9612RM manual Back-to-Back Connections to a Second Modem, RS-232 RTU Interface

Page 33

Back-to-Back Connections to a Second Modem

Back-to-Back Connections to a Second Modem

Rx	Rx

Rx	Rx

Tx	Tx

Tx	Tx

Modem 1	Modem 2

RS-232 (RTU) Interface


Signal	Modem	DB25	Description
Name	Input/Output	Pin

Earth GND		1	Earth Ground

TXD	Input	2	Transmit Data

RXD	Output	3	Receive Data

RTS	Input	4	Request To Send

CTS	Output	5	Clear To Send

DSR	Output	6	Data Set Ready
			(Modem Ready)

SG	-	7	Signal Ground

DCD	Output	8	Data Carrier Detected

DTR	Input	20	Data Terminal Ready
			(Host Ready)

Page 33

Image 33

Contents DSP9612RM Flash Poll Rack-Mount Modem User’s Guide Compliances Contents Contents Chapter Introduction Features Ancillary Documentation ApplicationsIntroduction Chapter Installation Unpacking Your HardwareAdditional Items You Need Front View of Modem Hardware OverviewComponent View Configuring the Modem Installation SummaryConfiguring the Modem SW1-1 through SW1-4 − Transmit Level high- & low-speed modes SW1-5 − Receiver Dynamic Range high- & low-speed modes SW2-1 − Fast Poll/FSK high- & low-speed modes SW2-8 − Carrier Control high- & low-speed modes Low-Speed FSK Mode SW1-1 through SW1-4 Switch Settings SW1-6 and SW1-7 − RTS-CTS Delay low-speed mode only SW2-2 − CD Delay low-speed mode only SW2-5 − Soft Carrier low-speed mode only Installing the Modem in the Universal Data Shelf Installing the Modem in the Universal Data ShelfInstalling the Modem Modular Jack Connectors Connecting to a Transmission LineConnecting an RS-232 Device DLB LEDsIllustrates these three diagnostics Loopback Control SwitchProblem Solving Appendix a TroubleshootingPage General Specifications Appendix B SpecificationsMechanical Specifications RS-232 RTU Interface Back-to-Back Connections to a Second ModemCompliances Environmental SpecificationsAppendix C Limited Product Warranty Return Merchandise Authorization RMA Procedure Appendix D RMA Procedure