SDS-122 Serial Data Switch5/99Copyright © 1996-1999Campbell Scientific, Inc.

SDS-122 SERIAL DATA SWITCH6R147U1D24R14U6IC1UB1C101R130R44C109PL44PL43OPENOPENOPENCLOSEDOPENOPENOPENPL42PL41R123R124R122R121R142R47CONN1CONN3CONN2CONN

SDS-122 SERIAL DATA SWITCH7R147U1D24R14U6IC1UB1C101R130R44C109PL44PL43OPENOPENOPENCLOSEDCHANGE TO DTETURN 180”OPENOPENOPENPL42PL41R123R124R122R121R14

SDS-122 SERIAL DATA SWITCH84.3 DEFAULT JUMPER SETTINGSJUMPER DEFAULT DESCRIPTIONPL41 Not fitted When jumper PL41 is fitted, port A/B on the 3-way scr

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Campbell Scientific CompaniesCampbell Scientific, Inc. (CSI)815 West 1800 NorthLogan, Utah 84321UNITED [email protected]

Warranty and Assistance The SDS-122 SERIAL DATA SWITCH is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship

SDS-122 SERIAL DATA SWITCH TABLE OF CONTENTS PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrob

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1SDS-122 SERIAL DATA SWITCHThe SDS-122 is a configurable two-way serial data switch which will allow two modem devices to beconnected to a datalogger

SDS-122 SERIAL DATA SWITCH22.2 OPERATIONALTABLE 1. Current Consumption in Various Modes/Communication ActivityMode Activity Current Drainfrom Datalo

SDS-122 SERIAL DATA SWITCH3Switched Datalogger Port BFIGURE 3. Pin Positions for SwitchedDatalogger Port ‘B’: 9-way Female ‘D’ TypeConnectorThe switc

SDS-122 SERIAL DATA SWITCH4Control Port (3-way Screw Terminal)The control port is a 3-way terminal block withscrewed connections. This terminal block

SDS-122 SERIAL DATA SWITCH5result in errors on low-level analoguemeasurements. The SDS-122 can be set toprovide opto-isolation to prevent such groundl