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To use the RS485 communication for the Signal Conditioners you’ll need an available Communication port in your computer and have access to a generic communication software program (e.g.: Procomm1, Windows2 HyperTerminal3, etc, see details below for information). A RS485 signal conditioner communication software program is also available as an option to speed the set-up. A RS232 to RS485 converter box will also be required if your computer communications port is RS232. 1 Procomm is a registered trademark of Datastorm Technologies, Inc. 2 Windows is a registered trademark of Microsoft Corp. 3 HyperTerminal is a registered trademark of Microsoft Corp. Page 1 For Procomm: Start the Procomm Program. Press ALT + P (Select the appropriate communication parameters: Baud Rate, Parity, Data Bits, Stop Bits.) The default settings may require modifications. - Factory Default communication settings are as follows: Baud Rate = 9600 Parity = Odd Data Bits = 7 Stop Bits = 1 Press ALT + S (To save current communication settings) Press ALT + O (To go to chat mode) If the communication port selected is available and the communication parameters of both the computer and the DRX are matched, then a serial link may be established. To check the communication any of the commands may be tried i.e. *01X01 would return the current measured signal value. For Hyper Terminal (Windows 95): Start the Hyper Terminal Program from programs/accessories. Click on the Properties from the File menu. Under the Phone Number Menu choose: Connect using “Direct to COM1 or COM2” whichever that’s available. Click on Configure Button. Choose: Baud rate, Data bits, Parity and Stop bits According to DRX’s settings. Flow Control = None. Click “OK” Button. - Factory Default communication settings are as follows: Baud Rate = 9600 Parity = Odd Data Bits = 7 Stop Bits = 1 Under Settings Menu: Click ASCII Setup Button. Choose all options except “Force Incoming Data to 7 Bits ASCII”. Click “OK” Button. Page 2 DRX -- SIGNAL CONDITIONERS WITH RS485 SERIAL COMMUNICATION PORT COMPUTER RS232 TO RS485 CONVERTER HALF—DUPLEX NOTE: YOU CAN CONNECT A DRX DIRECTLY TO THE COMPUTER IF YOU HAVE A RS485 COMMUNICATION CARD INSTALLED IN THE COMPUTER. SYSTEM GND OR SHIELD FIRST UNIT ON BUS LAST UNIT ON BUS TEE COUPLER (JACKS SHOWN FOR CLARITY) SHIELDED WIRE CONNECT LAST UNIT WITH JUMPER TO INCLUDE 120. ON THE BUS DIN RAIL Communication Parameter Settings: Communication settings information are very critical during set-up, if any of the parameters are changed, it should be recorded on the label for future reference. If the communication parameters used by the computer does not match the communication parameter of the DRX, then the communication link may not be established. Hence it is important to record the communication parameter on the label if different from default. Resetting Communication Parameters to Factory Defaults To restore the communication parameters to the factory default settings, two test points must be shorted together. There are two ways of shorting these test points together, both are detailed below. Version A-- Test point TP6 must be shorted, by a wire, to test point TP17. or Version B-- Newer units have a jumper position S1-A for connecting these two test points together. Factory Default Settings for Communication: Baud Rate = 9600 Data Bit = 7 Parity = Odd Stop Bits = 1 Recognition Character = * Address = 01 Page 3 SAFETY CONSIDERATIONS This device is marked with the international Caution symbol. It is important to read this manual before installing or commissioning this device as it contains important information relating to Safety and EMC (Electromagnetic Compatibility). Unpacking & Inspection Unpack the instrument and inspect for obvious shipping damage. Do not attempt to operate the unit if damage is found. For instruments with AC Voltage and AC Current inputs, observe the input signal connections in the appropriate section of this manual. These instruments must only be installed by professional electricians. • Do not exceed voltage rating on the label located on the instrument housing. • Always disconnect power before changing signal and power connections. • Do not use this instrument on a work bench without its case for safety reasons. • Do not operate this instrument in flammable or explosive atmospheres. • Do not expose this instrument to rain or moisture. • Unit mounting should allow for adequate ventilation to ensure instrument does not exceed operating temperature rating. • Use electrical wires with adequate size to handle mechanical strain and power requirements. Install without exposing bare wire outside the connector to minimize electrical shock hazards. EMC Considerations • Whenever EMC is an issue, always use shielded cables. • Never run signal and power wires in the same conduit. • Use signal wire connections with twisted-pair cables. • Install Ferrite Bead(s) on signal wires close to the instrument if EMC problems persist. Failure to follow...

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