Programmable by way of detachable display front,
process calibration, signal simulation, password protection,
error diagnostics and help text available in several languages. Application
• Linearized, electronic temperature measurement with RTD or TC sensor.
• Conversion of linear resistance variation to a standard analog
current / voltage signal, i.e. from solenoids and butterfly
valves or linear movements with attached potentiometer.
• Power supply and signal isolator for 2-wire transmitters.
• Process control with standard analog output. Galvanic separation of analog signals and measurement of
• The DRST-UN is designed according to strict safety requirements and is therefore suitable for application in SIL 2 installations. Technical Characteristics
• When DRST-UN is used with the DRSL-DISPLAY programming front, all operational parameters can be modified to suit any
application. As the DRST-UN is designed with electronic hardware switches, it is not necessary to open the device for setting of
• A green / red front LED indicates normal operation and malfunction.
• Continuous check of vital stored data for safety reasons.
• 3-port 2.3 kVAC galvanic isolation.
Specifications Environmental Conditions Operating Temperature: -20 to 60°C Storage Temperature: -20 to 85°C Calibration Temperature: 20 to 28°C Relative Humidity: < 95% RH (non-cond.) Protection Degree:v IP20 Mechanical Specifications Dimensions (H x W x D): 109 x 23.5 x 104 mm Weight Approx: 145 g Wire Size: 1 x 2.5 mm 2 stranded wire Screw Terminal Torque: 0.5 Nm Vibration: IEC 60068-2-6 2 to 13.2 Hz: ±1 mm 13.2 to 100 Hz:±0.7 g Common Specifications Supply Supply Voltage, Universal:21.6 to 253 Vac, 50 to 60 Hz or 19.2 to 300 Vdc Fuse: 400 mA SB/250 Vac Max. Required Power: = 2.0 W Isolation Voltage Isolation voltage, test/working:2.3 k Vac / 250 Vac Response Time Temperature input (0 to 90%, 100 to 10%): = 1 s mA / V input (0...90%, 100...10%): = 400 ms Auxiliary Supplies 2-w. supply (term. 44 to 43): 5 to 16 Vdc/0 to 20 mA Programming: Communication enabler DRSL-DISPLAY Signal/Noise Ratio: Min. 60 dB (0 to 100 kHz) Accuracy: Better than 0.1% of sel. range EMC Immunity Influence: < ±0.5% of span Extended EMC Immunity: NAMUR NE21, A Criterion, Burst: < ±1% of span Input Specifications RTD Input RTD Type:
Cu10/20/50/100 Cable Resistance Per Wire: 50 Ω (max.) Sensor Current: Nom. 0.2 mA Effect of Sensor Cable Resistance (3/4-wire): < 0.002 Ω/Ω Sensor Error Detection: Yes Short Circuit Detection < 15 Ω Linear Resistance Input Linear Resistance Min/Max: 0 to 10000 Ω Potentiometer Input Potentiometer Min/Max: 10 to 100 kΩ TC Input Thermocouple Type: B, E, J, K, L, N, R, S, T, U, W3, W5, LR Cold Junction Compensation (CJC) via ext. Sensor in Connector 5910: 20 to 28°C = ±1°C, -20 to 20°C/28 to 70°C = 2°C CJC via int. Mounted Sensor: ±(2.0°C + 0.4°C * ∆t) ∆t =: Internal temp.-ambient temp. Sensor Error Detection: Yes Sensor Error Current: When detecting/else: Nom. 2 µA / 0 µA Current Input Measurement Range: 0 to 20 mA Programmable Measurement Ranges: 0 to 20 and 4 to 20 mA Input Resistance: Nom. 20 Ω + PTC 50 Ω
Sensor Error Detection: Loop
Break 4 to 20 mA: Yes Voltage Input Measurement Range: 0 to 12 Vdc Programmable Measurement Ranges: 0/0.2 to 1, 0/1 to 5, 0/2 to 10 Vdc Input Resistance: Nom. 10 MΩ Output Specifications Current Output Signal Range: 0 to 20 mA Programmable Signal Ranges: 0 to 20/4 to 20/20 to 0/20 to 4 mA Load (@ current output): = 800 Ω Load stability: = 0.01% of span / 100 Ω Sensor Error Indication: 0/3.5/23 mA/none NAMUR NE43 Upscale/Downscale: 23 mA/3.5 mA Output Limitation, on 4 to 20 and 20 to 4 mA signals: 3.8 to 20.5 mA Output Limitation, on 0 to 20 and 20 to 0 mA signals: 0 to 20.5 mA Current Limit: = 28 mA Voltage Output Signal Range: 0 to 10 Vdc Programmable Signal Ranges: 0/0.2 to 1; 0/1 to 5 ; 0/2 to 10; 1 to 0.2/0; 5 to 1/0; 10 to 2/0 V Load (@ Voltage Output): = 500 kΩ Of span: = of the currently selected measurement range Observed Authority Requirements EMC: 2014/30/EU LVD: 2014/35/EU EAC: TR-CU 020/2011 Approvals UL UL 508 / C22.2 no. 14 DNV-GL Marine Stand. f. Certific. No. 2.4 EU RO Mutual Recognition Type Approval:MRA000000Z SIL: Hardware assessed for use in SIL applications
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