I. what signal conditioners do, Ii. model of unit, Iii. rs485 serial communication setup – Omega Speaker Systems DRX-TC User Manual
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I. WHAT SIGNAL CONDITIONERS DO:
The DRX Series Signal Conditioners are high performance devices used as a front end for PLC’s and
Data Acquisition systems to measure a variety of low level transducer signals with high precision and
accuracy. The DRX Series Signal Conditioners interface directly to transducers and digitize the input
signal. The measured signal is then transmitted to a PLC or a computer using the RS485 Serial
Communication. Up to 32 units may be connected to the same serial RS485 bus, and each unit may
be addressed to transmit the signal being measured under program control, executed on a PLC or a
computer. The key features of the DRX Series Signal Conditioners are the ease of set-up and factory
calibrated ranges. All range switching are done electronically by sending the appropriate command;
therefore, there is no need to remove or open the units when signal input levels are changed. All set-
up may be done by using the Set-up Software running on a computer or by user supplied programs.
II. MODEL OF UNIT :
There are 7 models available:
THERMOCOUPLE
( DRX-TC )
RTD
( DRX-RTD )
STRAIN
( DRX-ST )
PROCESS
( DRX-PR )
FREQUENCY/PULSE
( DRX-FP )
AC VOLT
( DRX-ACV )
AC CURRENT
( DRX-ACC )
III. RS485 SERIAL COMMUNICATION SETUP:
Communication with the UNIT will be performed via serial communication using RS485 standard
(half duplex). 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.: Procomm
1
, Windows
2
HyperTerminal
3
, 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.
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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.