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Фрагмент инструкции
9 OUTPUT SIGNAL in Vdc ........................... 9 OUTPUT SIGNAL in mA ............................ 9 MATERIALS .............................................. 9 POWER SUPPLY ..................................... 9 MECHANICAL DIMENSIONS .................... 9 GALVANIC ISOLATION ............................. 9 GENERAL SPECIFICATIONS ................... 9 8-CAUTIONS, WARNINGS AND NOTES............... 10 SAFETY CONSIDERATIONS PRESCRIPTION.Before starting any operation for replacement, maintenance or repair, the unit must be disconnected from any kind of power supply. Keep the unit clean, to assure good functioning and performance. To prevent electrical or fire hazard, do not expose the unit to excessive moisture. Do not operate the unit in the presence of flammable gases or fumes, such an environment definetely constitutes a safety hazard. The unit is designed to be mounted on a metal panel. If the unit shows signs of damage, is not able to show the expected measures, has been stored in a bad conditions or a protection failure happened, then do not attempt to operate, keep the unit out of service and send for repair. IN CASE OF FIRE 1.- Disconnect the unit from the power supply 2.- Give the alarm according to the local rules 3.- Switch off all air conditioning devices 4.- Attack the fire with carbonic snow, do not use water in any case WARNING: In closed areas do not use systems with vaporized liquids. Page 3 User’s Manual Series DRF 1-GENERAL INFORMATION___________________________________ The DRF series of Isolated Signal Converters, allow to convert process signals, temperatures, electrical signals, etc, to current loops or voltage signals for further retransmision, while introducing into the system galvanic isolation barriers between the input, the output and the power supply circuits. The DRF series of Isolated Signal Converters, offer an excellent relation between signal conversion speed and measurement accuracy. Offering a 0.2% accuracy and up to a 70ms response time depending on the model, these units can process information coming from probes or transducers, in such a way that can be quickly retransmitted in a fast and accurate form to remote data acquisition systems or PLC’s. The isolated signal converters of the ISC series are ideal to integrate into 12 bit data acquisition systems. Its powerful galvanic isolation of 3.500 V introduces high security to the measuring systems, preventing the propagation of those phenomenon which usually cause damage to the remote system, such as transient peaks or energy shocks in any of the circuits of the system. The galvanic isolation also acts as a strong CE barrier. The decoupling created between the input, output and power circuits avoids pernicious effects on the output, such as ground loops or signal leaks, which distort the acquired data and are extremely difficult to isolate once introduced into the signal. The isolation offered by the DRF series of Isolated Signal Converters is a 3 way isolation. Thus, all the benefits exposed above are applicable to any of the three circuits composing the instrument : input, output and power. Recalibration of the instruments is realized in a fast and easy way. Opening the front cover grants access to the configuration jumpers. Additional Span and Offset potentiometers are directly accessible from the frontal part. These potentiometers are highly decoupled, minimizing the iterations needed to obtain a correct adjustment. In order to obtain a higher and quickest benefit of the DRF units, we recommend you to read carefully the information provided in this manual before proceeding to the installation of the instrument. In this manual you will find all technical data, both electrical and mechanical, needed for a correct instalation and utilization. Note : The DRF Isolated Signal Converter instruments have a characteristics label attached on the side of the instrument. Check that the information indicated on the label matches with your application requirements, and specially check that the value and type of the power supply needed matches the value and type of the power supply availble on your installation. Page 4 User’s Manual Series DRF 2-INSTALLATION____________________________________________ Before installing the instrument check the characteristics label attached to the side of the unit. Specially check that the value of the power supply needed, matches the power supply available on your installation. The characteristics label also indicates the input/output signal relation for the instrument. Remember to take note of the new input/ output relation if you proceed to readjust the instrument. To access the selection jumpers for input and output ranges, and the Span and Offset potentiometers, slightly press the A-A points of the front cover as indicated on Figure1. OUTPUT JUMPERS POT. SPAN POT. OFFSET INPUT JUMPERS FIGURE 1 FIGURE 3 FIGURE 2 FRONT COVER J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 The instrument must be installed i...
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