USD 285.18
RTD temperature transmitter with configurable current/voltage output, 2-/3-/4-wire input, 3-way isolation, and 24 VDC supply.
Temperature signal conditioner for RTD sensors with configurable current or voltage analog output. The module supports Pt100, Pt200, Pt500, and Pt1000 sensors, as well as resistors up to 4.5 kΩ, and can be configured via DIP switch or WAGO Interface Configuration Software. It accepts 2-, 3-, and 4-wire sensor connections, provides 3-way electrical isolation, and includes diagnostic functions for wire break, short circuit, and measurement range underflow/overflow. The device is DIN-rail mounted and powered from 24 VDC.
| Parameter | Value |
|---|---|
| Item number | 857-801 |
| Supply voltage | 24 VDC |
| Nominal supply voltage Us | 24 VDC |
| Supply voltage range | ±30 % |
| Current consumption at nominal supply voltage | ≤ 50 mA |
| Input signal type | Pt sensors; Resistance |
| Sensor types (RTD) | Pt100; Pt200; Pt500; Pt1000 |
| Sensor connection | 2-wire; 3-wire; 4-wire (switchable) |
| Sensor power supply (RTD) max. | ≤ 0.5 mA |
| Temperature measurement range (RTD) | -200 … +850 °C |
| Measurement span (RTD) min. | 50 K |
| Input range (resistor) | 0 … 1 kΩ; 0 … 4.5 kΩ |
| Measurement span (resistor) min. | 50 Ω |
| Output signal type | Current; Voltage |
| Output signal (voltage) | 0 … 5 V; 1 … 5 V; 0 … 10 V; 2 … 10 V |
| Output signal (current) | 0 … 10 mA; 2 … 10 mA; 0 … 20 mA; 4 … 20 mA |
| Load impedance (voltage output) | ≥ 2 kΩ |
| Load impedance (current output) | ≤ 600 Ω |
| Step response (typ.) | 180 ms (2-wire); 360 ms (3-wire) |
| Transmission error (typ.) | ≤ 0.1 % at full measurement span |
| Transmission error for set measurement range | ≤ ((10 K/set measurement range [K]) + 0.1) % |
| Temperature coefficient | ≤ 0.02 %/K |
| Rated voltage | 300 V |
| Protection type | IP20 |
| Test voltage | 2.5 kVAC; 50 Hz; 1 min |
| Overvoltage category | II |
| Pollution degree | 2 |
| Insulation type (input/analog output/supply) | Functional insulation |
| Insulation type (adjacent devices) | Reinforced insulation (safe isolation) |
| Connection technology | Push-in CAGE CLAMP® |
| Solid conductor | 0.08 … 2.5 mm² / 28 … 14 AWG |
| Fine-stranded conductor | 0.34 … 2.5 mm² / 22 … 14 AWG |
| Strip length | 9 … 10 mm / 0.35 … 0.39 inches |
| Width | 6 mm / 0.236 inches |
| Height | 94 mm / 3.701 inches |
| Depth from upper-edge of DIN-rail | 97.8 mm / 3.85 inches |
| Mounting type | DIN-35 rail |
| Color | light gray |
| Insulation material (main housing) | Polyamide (PA66) |
| Flammability class per UL94 | V0 |
| Fire load | 0.486 MJ |
| Weight | 35.1 g |
| Ambient temperature (operation) | -25 … +70 °C |
| Ambient temperature (storage) | -40 … +85 °C |
| Relative humidity | 5 … 95 % (no condensation permissible) |
| Operating altitude (max.) | 2000 m |
| Conformity marking | CE |
| EMC immunity to interference | EN 61000-6-2 |
| EMC emission of interference | EN 61000-6-4 |
| Standards/specifications | DNV |
| GTIN | 4045454502713 |
Converts Pt100/Pt1000 field sensors into a standard 4–20 mA or 0–10 V signal for PLC analog input cards.
Eliminates direct RTD wiring to the control cabinet and standardizes diverse temperature sensors into one analog format.
Used in remote panels where low-level RTD signals need conditioning before transmission over longer analog runs.
Reduces susceptibility to noise and cable resistance effects by converting the sensor signal into a robust analog output with isolation.
Supports mixed RTD and resistor inputs with configurable wire modes, making it suitable for skid upgrades and instrumentation retrofits.
Allows replacement of older temperature measurement loops without changing the downstream analog infrastructure.
