Threshold value switches; RTD sensors; 1 make contact; Digital output; Configuration via software; Supply voltage: 24 VDC; 12.5 mm module width; Path.
The WAGO 2857 series RTD threshold value switch features a single analog input compatible with various RTD types (Pt100 to Pt20000) and potentiometers (0-100 k?) in 2-wire, 3-wire, or 4-wire configurations. It operates on a supply voltage range of 16.8-31.2Vdc (nominal 24Vdc, SELV) and includes Push-in CAGE CLAMP spring connections for secure wiring. Designed for DIN-35 rail mounting with a compact 12.5mm width, it is rated for an ambient temperature range of -40°C to +70°C and has an IP20 protection rating. The device is equivalent to model number 2857533000001.
- altitude:
- A1
- bounce time typ:
- 8 ms
- configurable rise fall delay time do:
- 0 60 s (via software)
- configurable rise fall delay time relay:
- 0 60 s (via software)
- configuration options:
- WAGO Interface Configuration Software || WAGO Configuration Display
- conformity marking:
- CE
- connection technology:
- Push-in CAGE CLAMP
- contact material relay:
- AgNi + Au
- continuous current do max:
- 100 mA (no internal restriction)
- country of origin sales organisation germany:
- DE
- depth from upper edge of din rail:
- 107 mm / 4.213 inch
- dielectric strength open contact ac 1 min:
- 1 kVrms
- drop out time typ:
- 4 ms
- emc emission of interference:
- EN 61000-6-4: EN 61326-2-3: EN 50121-3-2
- emc immunity to interference:
- EN 61000-6-2: EN 61326-2-3: EN 50121-3-2
- extended operating temperature at switch on:
- ST1
- fine stranded conductor:
- 0.2 2.5 mm / 24 12 AWG
- fire load:
- 1.374 MJ
- height:
- 110 mm / 4.331 inch
- input range potentiometer:
- 0 100 k
- input range resistor:
- 0 100 k
- input signal type:
- RTD sensors || Potentiometers || Resistor
- insulation type input supply and service interface relay output:
- Reinforced insulation
- insulation type input supply service interface:
- Basic insulation
- limiting continuous current relay module assembly:
- 6 A (¤ 60 C): 3 A (60 70 C)
- line to neutral conductor voltage ac max:
- 300 V
- measurement range temperature rtd:
- -200 850C
- mounting type:
- DIN-35 rail
- nominal supply voltage us:
- DC 24 V (SELV)
- note:
- This product is supplied with 24 VDC, which can be commoned using lateral push-in type jumper bars: (6.1) US+ (BR) and (6.2) GND 2 (BR). With this variant, it is necessary to ensure that the maximum permissible total current of 2 A is not exceeded.
- number of make switch on contacts:
- 1
- number of switching thresholds do:
- 1 or 2 (adjustable)
- number of switching thresholds relay:
- 1 or 2 (adjustable)
- operating temperature class:
- OT3
- overvoltage category:
- II
- packaging type:
- Bag
- pollution degree:
- 2
- power consumption at nominal supply voltage:
- ¤ 40 mA (+ IDO)
- power supply interruptions:
- S1
- power supply switching classes:
- C2
- power supply type:
- 24 VDC
- protective coatings for populated pcbs:
- PC2
- pull in time typ:
- 8 ms
- quick temperature changes:
- H1
- sensor connection:
- 2-wire: 3-wire: 4-wire: differential
- sensor power supply rtd max:
- ¤ 0.5 mA
- sensor types rtd:
- Pt100 || Pt200 || Pt500 || Pt1000 || Pt5000 || Pt10000 || Pt10 Pt20000
- service life:
- L4 at 40 C (max.)
- software filter adjustable:
- Moving average value (filter level: 30)
- solid conductor:
- 0.2 2.5 mm / 24 12 AWG
- standards specifications:
- EN 61010-1 || EN 61373
- step response typ:
- 60 ms (2-wire): 360 ms (3-wire): 540 ms (4-wire): 360 ms (Potentiometer)
- strip length:
- 9 10 mm / 0.35 0.39 inch
- supply voltage range:
- 30 %
- switching voltage do max:
- Supply voltage (applied): 0.3 V
- switching voltage max:
- AC 250 V
- temperature coefficient:
- ¤ 0,01 %/K
- temporary supply voltage dips:
- Criterion B
- test voltage input relay output supply:
- 4 kVAC: 60 Hz: 1 min
- test voltage input service interface:
- 3 kVAC: 60 Hz: 1 min
- test voltage relay output service interface:
- 4 kVAC: 60 Hz: 1 min
- test voltage supply service interface:
- 2.5 kVAC: 60 Hz: 1 min
- transmission error max:
- 1 K
- wago connector:
- picoMAX 5.0
- weight:
- 86.050 g
- width:
- 12.5 mm / 0.492 inch
