Cannon Instrument miniAV-LT - Manual (Page 121)

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CANNON ® miniAV-LT Low Temperature Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.a— May, 2009; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
CHAPTER
A
APPENDIX A–MULTIPLE UNIT
CONFIGURATION
Introduction
The miniAV-LT instrument is capable of being networked with the
controlling computer via available RS-485 connections. As many as four
miniAV-LT instruments may be connected to a single computer. Follow
the instructions in this appendix to complete assembly of the multi-unit
networking kit, available from CANNON
® .
Kit components
The multi-unit interface kit contains an RS-232-to-RS-485 converter and
RJ-45 cables capable of networking up to four CAV Bath Units to a
single computer.
Procedure
Using the interface kit components, complete the multi-unit configuration
as follows:
Connecting components
NOTE The interface kit was designed for Bath Units placed in an adjacent
configuration. Custom configuration with longer RJ-45 cables is possible.
Make certain to install the VISCPRO ® software on the controlling
computer. Complete all component assembly before proceeding with RS-
485 networking.
Completing RS-485 connections
CAUTION 1. Make sure the power is removed from the computer and all instru-
ments to be configured.
2. Locate the RS-485 converter and required RJ-45 connecting cable(s).
3. Attach the RS-485 converter directly to the computer via the standard
9-pin RS-232 connector. Then attach the longer RJ-45 cable from the
converter to the RS-232 connector on the serial communications
interface on the ear panel of the first miniAV-LT instrument.