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RT284U is a high-performance temperature controller with universal input for RTD, thermocouples and linear signals. Equipped with a 4-digit LED display, up to 4 programmable relay control/alarm outputs, one analog relay and optional RS485 interface, it provides precise control and flexible integration into various industrial applications. The device has a built-in self-diagnostics and self-calibration circuit, the ability to manually correct the reading, as well as program compensation for line resistance and cold junction temperature. The correspondence of the input and display for linear input, the decimal point, the unit of measurement are also programmable. Thanks to the universal input, interface, variety of housings, RT284U finds extremely wide industrial application.
The RT284U is widely used in industrial processes requiring precise temperature control. Thanks to its universal input and variety of housings, the controller is suitable for:
| Корпус | 48×48 mm, 48×96 mm, 72×36 mm, 72×72 mm, 96×48 mm, 96×96 mm |
|---|---|
| Захранване | 115 VAC, 230 VAC, 90…250 V |
| Релеен изход | Relay NO |
| Интерфейс | None, RS485 |
| Протокол | ASCII, ASCII PolyMonitor |
| Аналогов изход | 0…10 V, 0…20 mA, 4…20 mA, None, Other |
| Повишена лицева защита | IP65 |
| Аналогов вход | 0…10 V DC linear voltage, 0…20mA DC linear current, 4…20mA DC linear current, Custom linear signal, RTD Pt100 – 1.385, RTD Pt1000 – 1.385, RTD PTC 1k, RTD PTC 2k, Thermocouple (TC) B, Thermocouple (TC) J, Thermocouple (TC) K, Thermocouple (TC) R, Thermocouple (TC) S, Thermocouple (TC) T, Two-wire external transmitter |
From: 70.79 €
| Input (programmable) | |
| Pt100 (w=1.385); 3-wire (DIN IEC 60751) | -100…850 °C |
| Pt1000 (w=1.385); 3-wire (DIN IEC 60751) | -100…600 °C |
| PTC (1k at 25 °C); 3-wire (KT and KTY based) | -50…150 °C |
| PTC (2k at 25 °C); 3-wire (KT and KTY based) | -50…150 °C |
| Thermocouple “T” (DIN IEC 60584) | -40…400 °C |
| Thermocouple “J” (DIN IEC 60584) | -20…1000 °C |
| Thermocouple “K” (DIN IEC 60584) | -20…1300 °C |
| Thermocouple “S” (DIN IEC 60584) | 0…1700 °C |
| Thermocouple “R” (DIN IEC 60584) | 0…1700 °C |
| Thermocouple “B” (DIN IEC 60584) | 100…1800 °C |
| Linear voltage 0…10 V | -1999…9999, programmable |
| Linear current 0(4)…20 mA | -1999…9999, programmable |
| Linear resistive 0…1 kΩ | -1999…9999, programmable |
| Custom linear (option) (1) | -1999…9999, programmable |
| Two-wire external transmitter | 4…20 mA (2) |
| Manual input offset | programmable |
| Input type selection | programmable |
| Decimal point selection | programmable |
| Temperature measurement unit | °C or °F, programmable |
| Outputs (up to 4 relay outputs) | |
| Relay electromechanical | 5A/250V w/ NO/NC or NO (3) contact |
| Solid state relay (SSR) (8) | 1A/250VAC (4) |
| MOS gate (8) | 0.1A/60V, optically isolated |
| Output for external SSR | 5…24 V, 30 mA |
| Control algorithm | ON/OFF |
| Set point | within input range limits |
| Alarms | programmable |
| Analog output | 4(0)…20 mA, 0…10 V |
| Serial interface | RS485, isolated |
| Accuracy | |
| Measurement error | 0,3% (5) from span |
| Temperature drift | 0.02% from span for 1 °C |
| Cold junction compensation | automatic, -10…80 °C |
| RTD line compensation | automatic, up to 2 х 25 Ω |
| Power supply | |
| Mains supply voltage (6) | 230 VAC или 115 VAC |
| SMPS voltage | 90…250 V |
| Isolated low voltage | 12…24 V или 24 VAC (6) |
| Non-isolated low voltage | 12…24 V |
| External mains transformer (7) | 9(12) VAC |
| Consumption | max. 2 VA |
| Indication and controls | |
| Digital display | 4 LED indicators |
| LEDs | 2 LEDs for output state |
| Keyboard | 3 membrane keys |
| Operating conditions | |
| Ambient temperature | -10…65 °C |
| Ambient humidity | 0…85 %RH |
| Design and materials | B | H / V | Q | S | L |
| Front dimensions [mm] | 96×96 | 96×48 | 72×72 | 48×48 | 72×36 |
| Mounting | panel | panel | panel | panel | panel |
| Panel cutout [mm] | 90×90 | 90×42 | 67×67 | 45×45 | 71×29 |
| Mounting depth [mm] | 98 | 98 | 66 | 100 | 56 |
| Display digit height [mm] | 20 | 14 | 14 | 10 | 9 |
| Maximum weight [g] | 350 | 300 | 300 | 200 | 150 |
| Protection, front/terminals | IP54/20 | IP54/20 | IP54/20 | IP54/20 | IP54/20 |
| Increased front IP (option) | IP65 | IP65 | – | – | IP65 |
| Case material | plastic | plastic | plastic | plastic | plastic |
| Wiring (terminals) | plug-in | plug-in | screw | screw | screw |
(1) Instead of linear current
(2) Provides loop supply voltage – 24 VDC (only w/ isolated power supply).
(3) For case ‘Q’ and case ‘S’ w/ SMPS, 1st relay is NO; for case ‘L’, case ‘Q’ w/ SMPS, and case ‘S’ w/ serial interface, 2nd relay is NO.
(4) 0.2A/250VAC for case ‘L’
(5) 0.5% for T/Cs “S”, “R”, and “B”
(6) Not available for case ‘L’.
(7) Available only for case ‘L’. Transformer is ordered separately.
(8) Ask for availability!
(9) Not available for cases ‘Q’ and ‘S’.
