8
Section 4.1 - Universal AC/DC transmitter
Universal AC/DC transmitter
4
• Measures AC current and voltage signals and converts these into uni-/bipolar DC current and voltage signals ~
• Outputs passive or active current signals
• Programming, process monitoring and diagnostics via DRSL-DISPLAY
• Response time < 0.75 s and excellent accuracy better than 0.3%
• Universally powered by 21.6…253 Vac / 19.2...300 Vdc
Application
• The 0... 5 AAC range makes it possible to accurately measure a typical current transformer.
• The 0...300 VAC range allows accurate supply voltage monitoring.
• The DRST-AC measures standard input ranges, and can be freely configured to customer-defined input range.
• Converts narrow AC current / voltage inputs to wide bipolar or unipolar outputs, e.g. 0…1 VAC input = ±10 volt or 4...20 mA
output with a minimum span of 0.5 AAC or 0.5 VAC.
• The detachable DRSL-DISPLAY displays provide enhanced diagnostics.
• Configurable input limits control the output value for increased safety.
Technical characteristics
• The latest analog and digital techniques are used to obtain maximum accuracy and immunity to interference.
• Possibility of output safety readback by selecting S4...20 mA output.
• Response time < 0.75 s for measuring AC current / voltage signals.
• The current output can drive up to 800 Ohms, with an adjustable response time of 0.0…60.0 seconds.
• Exceptional mA output load stability of < 0.001% of span / 100 Ohm.
• Meets the NAMUR NE21 recommendations, ensuring high accuracy in harsh EMC environments.
• Meets the NAMUR NE43 recommendations, allowing the control system to easily detect an input error.
• Each unit is tested to a high 2.3 kVAC, 3-port galvanic isolation level.
• Excellent signal to noise ratio of > 60 dB.
Mounting / installation / programming
• Very low power consumption means units can be mounted side by side without an air gap – even at 60°C ambient temperature.
• Configuration, monitoring, 2-point process calibration and more are accomplished using either the DRSL-DISPLAY detachable
display or the DRST-CM detachable digital communication enabler.
• All programming can be password-protected.
