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Advantages

  • 4-digit bright LED display
  • 6 DIN housing
  • Universal input for 4 RTD, 6 TD and 4 line signals
  • RS485 serial interface available
  • Up to 4 relay outputs and 1 analog relay output

Description

RT228 combines two RT28 controllers in one 96×96 mm case. Thanks to its lower cost than the combined cost of 2 separate RT28 controllers, this model is often preferred when 2 technological parameters are controlled in one machine or installation or of separate adjacent processes. Typical applications include control of 2 temperatures, temperature and humidity, pressure and temperature, pH and temperature, and other combinations. Each of the 2 incorporated controllers controls its relay outputs through an ON/OFF or PD algorithm, and thanks to these relay duplex outputs (2 relays per controller, 4 relays per whole device), RT228 is best suited for controlling motorized valve actuators or other actuators with 2-way action. The reliable operation even in the presence of electromagnetic disturbances makes the RT228 controller a widely applicable device.

Additional information

Захранване

115 VAC, 230 VAC, 90…250 V

Разрешаваща способност

0.1, 1

Релеен изход

For ext. SSR, Internal SSR, MOS gate, None, Relay NO/NC

Закон за управление

ON/OFF, PD

Компенсация на 3-проводната RTD линия

Built-in line resistance compensation, None

Повишена лицева защита

IP65

Аналогов вход

0…10 V DC linear voltage, 0…20mA DC linear current, 4…20mA DC linear current, Other, RTD Cu100 – 1.426, RTD Cu100 – 1.428, RTD Cu50 – 1.426, RTD Cu50 – 1.428, RTD other, RTD Pt100 – 1.385, RTD Pt1000 – 1.385, RTD Pt50 – 1.385, RTD Pt500, Thermocouple (TC) J, Thermocouple (TC) K, Thermocouple (TC) L, Thermocouple (TC) L – GOST

RT228 contoller

Current / Voltage / ResistanceHumidityTemperature

Technical Specifications
Input (for each controller)
Pt50 (w=1.385); 3-wire-9,9(-50)…90,0(500) °C
Pt100 (w=1.385); 3-wire-9,9(-50)…90,0(500) °C
Pt500 (w=1.385); 3-wire-9,9(-50)…90,0(500) °C
Pt1000 (w=1.385); 3-wire-9,9(-50)…90,0(500) °C
Cu100; 3-wire-9,9(-50)…90,0(500) °C
Cu50; 3-wire-9,9(-50)…90,0(500) °C
Other RTD (1)мин. -99…макс. 500 °C
Thermocouple “J”0…999(600) °C
Thermocouple “K”0…999(600) °C
Thermocouple “L”0…999(600) °C
Thermocouple “L-GOST”0…999(600) °C
Other thermocouple (1)min. -99…max. 500 °C
Linear voltage 0…10 V-99…900 (0…999) (2,3)
Linear current 0(4)…20 mA-99…900 (0…999) (2,3)
Custom linear voltage; max. 40 Vmin. -99…max. 999 (2,3)
Custom linear current; max. 80 mAmin. -99…max. 999 (2,3)
Outputs (for each controller, up to 2 relay outputs)
Relay electromechanical5A/250V w/ NO/NC contact
Solid state relay (SSR) (4)1A/250VAC
MOS gate (4)0.1A/60V, optically isolated
Output for external SSR5…24 V, 30 mA
Control algorithmON/OFF, PD
Set pointwithin input range limits
Programmable parametersaccording to control algorithm
Accuracy (for each controller)
Measurement error0.4% from span
Temperature drift0.005% from span for 1 °C
Cold junction compensation± 1 °C
RTD line compensation (option)0.01% from span for 1 Ω
Power supply (for each controller)
Mains supply voltage230 VAC or 115 VAC
SMPS voltage90…250 V
Isolated low voltage12…24 V or 24 VAC
Non-isolated low voltage12…24 V
Consumptionmax. 3 VA
Indication and controls (for each controller)
Digital display3 LED indicators, 14 mm
LEDs2 LEDs for output state
Keyboard3 membrane keys
Operating conditions
Ambient temperature-10…65 °C
Ambient humidity0…85 %RH

 

Design and materials
Case materialplastic
Mountingin 90×90 mm panel cut-out
Wiringplug-in terminals
Dimensions96×96(front)x107 mm
Mounting depth98 mm
Weightmax. 600 g
Protection, front/terminalsIP54 / IP20
Increased front IP (option)IP65

(1) Custom; specify range within the limits stated.
(2) Specify lower and upper display limits.
(3) Provides loop supply voltage – 24 VDC (only w/ isolated power supply)
(4) Ask for availability!