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RTD Input Signal Conditioner - Discontinued

DRF-RTD Series

RTD Input Signal Conditioner | DRF-RTD Series

RTD Input Signal Conditioner

See All Models Below

  • 100 Ω Platinum (Pt) RTD Element, 0.00385 Curve
  • 2 or 3 Wire Configuration
  • 0.2% Accuracy
  • Cable Resistance Compensation up to 10 Ω
  • Upscale Break Protection
  • Response Time < 250 mS
  • Galvanic Isolation Between Input, Output and Power


This product has been discontinued. For a potential replacement, please see TXDIN402, DR-i3P, or DRST-UN.

The DRF series DIN rail signal conditioners are designed to accept a broad range of input signals, such as ac and dc voltage and current, frequency, temperature (thermocouple and RTD), and process transducers, and provide standard process outputs of either 4 to 20 mA, or 0 to 10 Vdc. The DRF series feature a modern housing design, that is easily mounted on standard 35 mm DIN rails. Connections are safely and securely made through pluggable screw terminal connectors, with input and output connections on the opposite sides of the module.

The DRF-RTD RTD signal conditioners accept 2 or 3 wire 100 platinum RTDs as input and provide an isolated 0 to 10 Vdc or 4 to 20 mA output. Models are available with three different power options,
24 Vdc, 120 Vac and 240 Vac.

The DRF-RTD are ideally suited for industrial applications. All models mount on a standard 35 mm DIN rail and provide galvanic isolation between input, output and power up to 3500 Veff (model specific). Module response time is 250 mS or less.

Range Code Table for DRF-RTD
Range CodeRange
-25/75C-25 to 75°C
0/100C0 to 100°C
0/200C0 to 200°C
0/300C0 to 300°C
0/450C0 to 450°C
0/600C0 to 600°C


RTD: 2 or 3 wire 100Ω platinum
RTD: α=0.00385
Accuracy: <0.2% full scale
Linearity: <0.1% full scale
Thermal Drift: 250 ppm/°C typical
Response Time: <250 mS (90% of signal)
RTD Excitation: 1 Vdc
Input Impedance: Measured with a "Wheatstone" bridge. Bridge to positive through a 100 . resistance, Bridge to negative through a 10 KΩ resistance

Power: 24 Vdc ±10%, 230 Vac ±10% 50/60 Hz, 115 Vac ±10% 50/60 Hz
Power Consumption: <3.8 VA
Output: 4 to 20 mA and 0 to 10 Vdc

Maximum Voltage Output: 11 Vdc approx.
Minimum Voltage Output: -1 Vdc approx.
Minimum Load Resistance (Voltage): >1 KΩ Maximum Current Output: 22 mA approx.
Maximum Current Output: -1.5 mA approx.
Maximum Load Resistance (current): >400 Ω

Electrical Connections: Plug-in screw terminals
Protection: IP-30

(DC Powered Models): 120 g (4.2 oz)
(AC Powered Models): 200 g (7 oz)
(DC Powered models):
110 H x 22.5 W x 93 mm D (4.3 x 0.9 x 3.7")
(AC Powered models):
110 H x 37 W x 93 mm D (4.3 x 1.46 x 3.7")
Operating Temperature: 0 to 60°C (32 to 140°F)
Storage Temperature: -20 to 70°C (-4 to 158°F)
Place Order(Specify Model Number)
Part Number/Desc.
Below are examples of popular models. See the Part Number Builder to order any available model.
Consult Sales  
RTD signal conditioner with -50 to 150C range, 4 to 20mA output and 115Vac power
Consult Sales  
RTD signal conditioner with 0 to 200C range, 4 to 20mA output and 115Vac power
Consult Sales  
RTD signal conditioner with -25 to 75C range, 0 to 10Vdc output and 115Vac power
All prices on this site are shown in Singapore Dollars.

Part Number Builder

Option Descriptions:

(1) Power select from:
115VAC for 115 Vac power
230VAC for 230 Vac power
24VDC for 24 Vdc power

(2) Range Code select from:
-25/75C for -25 to 75 degree C
-50/150C for -50 to 150 degree C
0/100C for 0 to 100 degree C
0/200C for 0 to 200 degree C
0/300C for 0 to 300 degree C
0/450C for 0 to 450 degree C
0/600C for 0 to 600 degree C

(3) Output select from:
4/20 for 4 to 20 mA
0/10 for 0 to 10Vdc
Note: All combinations may not be valid, check spec sheet for valid part numbers.
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