INSTRUCTION MANUAL SC932C 9-Pin to RS-232-DCE Interface Revision: 6/97 C o p y r i g h t ( c ) 1 9 9 7 C a m p b e l l S c i e n t i f i c , I n c .
Warranty and Assistance The SC932C 9-PIN TO RS232-DCE INTERFACE is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
SC932C 9-Pin to RS232-DCE Interface Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. Installation...................................................................1 2. Use with Intelligent Telephone Modems ...................1 3. Other Applications......................................................1 Appendices A. SC932C to RS232 Device Connection Details...... A-1 A.
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SC932C 9-PIN TO RS232-DCE INTERFACE The SC932C is used to interface a Campbell Scientific datalogger to modem devices that are configured with an RS232 DCE (Data Communications Equipment) serial port. The most common application is to allow the connection of a RAD short haul modem or third party telephone modem to a datalogger. The SC932C has the following features: • Generates true RS232 signal levels to the DCE device, resulting in good noise immunity.
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APPENDIX A. SC932C TO RS232 DEVICE CONNECTION DETAILS This Appendix gives details of the cables required for connection of an SC932C to DCE type RS232 devices, if the SC932C cannot be directly plugged into the 25-pin DCE, RS232 socket. A.1 CABLE FOR CONNECTION TO A 25-PIN DCE INTERFACE A standard pin-to-pin cable is suitable. However, if a custom cable is to be made it must make the following minimal connections: SC932C 25-Pin D Pin No. 25-Pin D Pin No.
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APPENDIX B. TECHNICAL DETAILS OF SPECIAL MODES OF OPERATION The SC932C is designed as a simple plug-in device with no internal jumpers. This Appendix describes alternative modes of operation and also relates these to Campbell Scientific’s original SC932 interface, for those users who are already familiar with that interface. B.1 POWER MODES B.1.1 NORMAL MODE In the normal mode of operation for the SC932C, a continuous supply of 4.
APPENDIX B. TECHNICAL DETAILS OF SPECIAL MODES OF OPERATION Datalogger Pin No. SC932C 9-Pin D Pin No. 1 1 2 2 4 No connection to SC932C 5 No connection to SC932C 6 5 9 9 FIGURE B-1. Connections for Using SC932C in ‘Printer’ Mode (Other wires can be left connected or disconnected.) With this connection the SC932C can be connected in parallel to another Campbell Scientific modem-type device. However, as with the SC932, any data output to synchronous devices (e.g.
APPENDIX C. SPECIFICATIONS Data rates: up to 38,400 baud (limited by datalogger) • RTS full power 7 - 9V with 3kΩ load (ME high) Size: 63 x 55 x 17mm (L x W x D), excluding mating D connectors • DTR 7.5 - 9.5V with 3kΩ load (8.
APPENDIX C. SPECIFICATIONS CONNECTION DETAILS TABLE C-1. 25-Pin Male Connector Pin-out Pin No. I/O Name Description 1 2 out GND TXD 3 in RXD 4 7 11 out in RTS GND PWR 20 out DTR Chassis Ground SC932C transmits data on this line SC932C receives data on this line Held active by SC932C Signal Ground If held >3.5V will force SC932C into high power mode Held high if ME is high (see Appendix B) TABLE C-2. 9-Pin Male Connector Pin-out Pin No.
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