Pt100 thermometer DT4122

Pt1000Pt500potentiometer

Product features

• Pt100 / Pt500 / Pt1000, resistance / potentiometer inputs
• 2 / 3 / 4 wire measurement
• 5 digit LED display, 20.3 mm character height
• 0.1 °C resolution
• 0-20 mA / 4-20 mA, galvanic isolated output (optional)
• 2 limit relay outputs (optional)
• RS232 / RS485 communication, MODBUS RTU protocol (optional)
• 144 × 72 mm panel instrument
• 24 VDC ±10% or, 230 V AC/DC ±10% power supply
• IP 65 (front) and IP 30 (rear) protection

Product description
The DT4122 … Resistance Thermometer enable process temperature or resistance value to be displayed on the control panel Pt100 / Pt500 / Pt1000 temperature sensor, resistor or potentiometer can be connected to the input of the instrument, either with 2, 3 or 4 wire. Large 5 digit, 20.3 mm character height LED display make process value easily visible at a distance.
The instrument is available with the following output options:

• 2 normally open relay contacts (SPST) for limit switching or for simple control tasks
• 0-20 mA / 4-20 mA galvanic isolated scalable current output *
• RS232 / RS485 galvanic isolated communication output with MODBUS RTU slave protocol *
• transmitter supply galvanic isolated 15 VDC 20 mA*.

(* either analogue or communication or transmitter supply option can be implemented at the same time)
The functional parameters can be set by push-buttons on the front panel of the device, through a simple menu system: input selection, averaging of input signals, scaling, display frequency, limit values, limit operating modes, scaling the analogue output, etc. The settings are protected by a two-level password against unauthorised manipulation.The Thermometer able to calculate with three sensor calibration point, to fit the real sensor curve to the instrument. The instruments has two power supply versions: 24 VDC ±10% (DT4122 …) or 230 V AC/DC ±10% (DT4122 … PS).
The DT4122 … is housed in a DIN standard 138 × 68 mm ABS case with IP 65 protection from the front and IP 30 protection from the back side, for installation on the control panel.

Technical specifications
Safety data:The connection terminals of the supply voltages are isolated from each other, the isolation is in compliance with EN 61010-1, pollution level: 2, measurement category: II
Input parameters:

• Input signal: Pt100 / Pt500 / Pt1000, resistance, potentiometer
• Measurement range: -200 - +800°C / 0-4000 Ohm
• Connection: 2, 3 or 4 wire
• Sampling: 12 measurement / sec.
• Number of averaged samples: 1 / 2 / 4 / 8 / 16 / 32 / 64 (selectable)
• Error of displayed value: < 0.2 °C @ Ta = 23 °C ±2 °C

Output parameters:
Analogue output (optional):

• Output type: 1 active or passive DC current (scalable)
• Range: 0-20 mA / 4-20 mA
• Burden: 600 ohm (max.)
• Error: < 0.03% (Ta = 23 °C ±2 °C)

Limit outputs (optional):

• Outputs: 2 NO SPST relays
• Contact rating: 30 VDC, 3 ADC / 240 VAC, 3 AAC

Transmitter supply (optional):

• Output voltage: 15 VDC ±10% @ 30 mA, 16 VDC ±10% @ 4 mA
• Output current: 30 mA max.
• Isolation voltage: 0.5 kV

Communication interface (optional):

• Type: RS232 or RS485 (isolated)
• Protocol: MODBUS RTU slave
• Baud rate: 300 / 600 / 1200 / 2400 / 4800 / 9600 Baud

Display:

• Display: 5 digit (+ values), 4 digit (- values), negative sign, decimal point
• Display unit: 5 digit LED, 20.3 mm character height

Manual controls:

• Manual controls: 3 membrane push-buttons on the front cover

Power supply:

• Power supply: 24 VDC ±10% (DT4122 ...), 230 V AC/DC ±10% (DT4122 ... PS)
• Consumption: 3.5 W / 3 VA

Ambient conditions:

• Operating temperature range: 0 - +60 °C (-20 - +60 °C for customer request)
• Relative humidity: 90% (max., non-condensing)
• Place of installation: cabinet

Electromagnetic compatibility (EMC) accordance with the standard EN 61326-1

• Immunity: industrial area
• Noise emission: Group 1, Class B

General data:

• Housing: panel instrument
• Connection: plug-in screw terminal / push-in direct connection
• Connection cable: 0.25-1.5 mm2 (max.)
• Dimensions / weight: 144 × 72 × 79 mm (width × height × depth) / 0.4 kg
• Protection: IP 65 (front), IP 30 (rear)

Detailed information see in operating instuctions. The Manufacturer maintans the right to change the technical data!