Programmable via detachable display front, process
calibration, signal and relay simulation, password protection,
error diagnostics and selection of help text in several
• 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 2 pairs of potential-free relay contacts
and analog output.
• Galvanic separation of analog signals and measurement of floating signals.
• The DRST-UR is designed according to strict safety requirements and is therefore suitable for application in SIL 2 installations. Technical Characteristics
• When DRST-UR is used in combination with the DRSL-DISPLAY programming front, all operational parameters can be modified to suit any application. As the DRST-UR is designed with electronic hardware switches, it is not necessary to open the
device for setting of DIP-switches.
• A green/red front LED indicates normal operation and malfunction. A yellow LED is ON for each active output relay.
• A continuous check of vital stored data for safety reasons.
• 4-port 2.3 kVAC galvanic isolation.
Environmental Conditions Operating Temperature: -20 to 60°C Storage Temperature -20 to 85°C Calibration Temperature20 to 28°C Relative Humidity < 95% RH (non-cond.) Protection Degree IP20 Mechanical Specifications Dimensions (H x W x D): 109 x 23.5 x 104 mm Dimensions (H x W x D) w/ 4501/4511:109 x 23.5 x 116 / 131 mm Weight Approx: 170 g Weight incl. 4501 / 4511 (approx.): 185 g/270 g Wire Size: 1 x 2.5 mm2 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: = 2.5 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 to 90%, 100 to 10%): = 400 ms Auxiliary Supplies 2-w. supply (term. 44...43): 25 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 Ω 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...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 Relay Output Relay Functions: Setpoint, Window, Sensor error, Latch, Power and Off Max. Voltage: 250 VRMS Max. Current:2 AAC or 1 ADC Max. AC Power: 500 VA 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