DRST-UN DIN Rail Universal Programmable Input Signal Conditioner
Universal Programmable Signal Transmitter. DIN Rail compatible.
Supported Applications
The Omega DRST-UN is a DIN Rail Universal Programmable Input Signal Conditioner designed for use in industrial environments. The device processes universal input signals, including thermocouples (TC), voltage (V), and current (mA). It is engineered for connection to hazardous electric voltages.
Operating Conditions & Performance
The transmitter operates within an ambient temperature range of -20°C to +60°C. Storage conditions are specified from -40°C to +85°C with relative humidity up to 95% non-condensing. The unit is rated for vibration at 10 to 500 Hz, 1.5 mm amplitude and shock resistance of 15 g, 11 ms half-sine.
Input accuracy across the series is ±0.5% of span. Supported input ranges include:
• TC (J): -200°C to +760°C
• TC (K): -200°C to +1372°C
• TC (T): -200°C to +400°C
• TC (E): -200°C to +1000°C
• TC (R): 0°C to +1760°C
• TC (S): 0°C to +1760°C
• TC (B): 0°C to +1820°C
• TC (N): -200°C to +1300°C
• V: 0 to 10 V
• mA: 0 to 20 mA
The device provides configurable output signals with ±0.5% of span accuracy, including 4-20 mA, 0-20 mA, 0-10 V, and 0-5 V.
Electrical Specifications
• Supply Voltage: 24 VDC ± 10%
• Power Consumption: Max 1.5 W
• Load Resistance (4-20 mA): Min 250 Ω
• Load Resistance (0-20 mA): Min 100 Ω
• Load Resistance (0-10 V): Min 10 kΩ
• Load Resistance (0-5 V): Min 10 kΩ
Configuration Options
The DRST-UN series features a plastic housing with an IP20 enclosure rating. Electrical connections are made via screw terminals. The device is UL Listed, CE Marked, and protected by double or reinforced insulation.
Housing & Mounting: Designed for DIN rail mounting according to DIN 46277. Configuration Options:
• DRSL-DISPLAY: Display and Programming Front
The model number guide follows the format: DRST-UN - <Input Type> - <Output Type> - <Supply Voltage> - <Options>.
Key Product Differences
Variants within the series are distinguished by input type (Thermocouple types J, K, T, E, R, S, B, N; Voltage; Current), output signal configuration (4-20 mA, 0-20 mA, 0-10 V, 0-5 V), and supply voltage. The optional DRSL-DISPLAY adds a display and programming front to the standard module.
Installation requires qualified personnel due to hazardous electric voltages. Do not open the front plate of the module as this will cause damage to the connector for the display / programming front DRSL-DISPLAY.
| Accuracy | ± 0.1 % |
| Approvals | UL: UL 508/C22.2 no. 14; NV-GL Marine Stand. f. Certific. No. 2.4; EU RO Mutual Recognition Type; Approval: MRA000000Z; SIL Hardware assessed for use in SIL applications; Authority Requirements:EMC: 2014/30/EU, LVD: 2014/35/EU, EAC: TR-CU 020/2011 |
| Calibration Temperature, Max | 28 °C |
| Calibration Temperature, Min | 20 °C |
| Cold Junction Compensation | 20 to 28°C = ±1°C, -20 to 20°C/28 to 70°C = 2°C |
| Electrical Output | 0 to 20 mA, 0 to 10 Vdc |
| EMC Immunity Note | Standard EMC Imunity: <±0.5% of span; Extended EMC Immunity: NAMUR, NE21, A Criterion, Burst: <±1% of span; Wire Size: 1 x 2.5 mm² |
| Enclosure Ratings | IP20 |
| Fuse Rating | 250 Vac/400 mA |
| Height | 109 mm |
| Input Control Signal | 0 to 12 Vdc |
| Input Control Signal Note | Measurement Range: 0 to 12 Vdc; Programmable Measurement Ranges: 0/0.2 to 1, 0/1 to 5, 0/2 to 10 Vdc |
| Input Current | 0 to 20 mA |
| Input_Current Note | 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 |
| Input Resistance | Voltage : Nom. 10 MΩ, Current: Nom. 20 Ω + PTC 50 Ω |
| Isolation | Test/Working: 2.3 kVac/250Vac |
| Length | 104 mm |
| Operating Temperature, Max | 60 °C |
| Operating Temperature, Min | -20 °C |
| Output Detail | Signal Range: 0 to 20 mA; Programmable Signal Ranges: 0 to 20/4 to 20/20 to 0/20 to 4 mA; 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; 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 |
| Output Signal | Current, Voltage |
| Potentiometer Input Range | 10 to 100 kΩ |
| Power Consumption | 2 W |
| Relative Humidity | < 95% RH Non-Condensing |
| Response Time | 1 sec |
| Response Time Note | Thermocouple: 1 sec, Current/Voltage: 400msec |
| RTD Input Note | Effect of Sensor Cable Resistance: < 0.002 Ω/Ω (3/4-wire); Cable Resistance, Per Wire: 50 Ω; Sensor Current: 0.2 mA; Short Circuit Protection: < 15 Ω; Sensor Error Current: 2 µA / 0 µA |
| RTD Type | 10/20/50/100/200/250/300/400/500/1000 Ω Pt Sensor, 50/100/120/1000 Ω Ni Sensor, 10/20/50/100 Ω Cu Sensor |
| Screw Terminal Torque | 0.5 Nm |
| Sensor/Transmitter Power | 5 to 16 Vdc/0 to 20 mA |
| Series ID | DRST-UN-Univ-Sig-Cond |
| Signal/Noise Ratio | > 60 dB |
| Storage Temperature, Max | 85 °C |
| Storage Temperature, Min | -20 °C |
| Supply Power Note | 21.6 to 253 Vac, 50 to 60 Hz or 19.2 to 300 Vdc |
| Supply Power Type | AC/DC |
| Supply Voltage | 21.6 to 253 Vac, 19.2 to 300 Vdc |
| Temperature Coefficient | ≤±0.01% of span/°C |
| Temperature Measurement Range | J: -100 to 1200°C, K: -180 to 1370 °C, T: -200 to 400 °C, E: -100 to 1000 °C, R: -50 to 1760 °C, S: -50 to 1760 °C, N: -180 to 1300 °C, B: 0 to 1820 °C, W3: 0 to 2300 °C, W5: 0 to 2300 °C, L: -200 to 900 °C, LR: -200 to 800 °C, RTD: -200 to 850 °C |
| Thermocouple Type | J, K, T, E, N, R, S, U, B, G, C, D, L, LR |
| Vibration | ±0.7 g |
| Vibration Note | IEC 60068-2-6; 2 to 13.2 Hz: ±1 mm; 13.2 to 100 Hz: ±0.7 g |
| Weight | 145 g |
| Width | 23.5 mm |
| Wire Type | Stranded |