- Both digital signal output and relay with make contact react to configured measuring range limits (switching ON/OFF delay and threshold value switch function configurable with up to two threshold values).
- Configurable RTD factor
- Adjustable software filter
- Input/Output response simulation via configuration display
- Safe 3-way isolation with 4 kV test voltage per EN 61140
The WAGO 2857 series RTD threshold value switch features DIP or software configuration and a display, with one analog input supporting 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 of 16.8-31.2Vdc (24Vdc nominal) and includes Push-in CAGE CLAMP spring connections for easy installation on a DIN-35 rail (12.5mm width). The device is rated for an ambient temperature range of -40°C to +70°C and has an IP20 protection rating, equivalent to model 2857533.
- 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:
- DIP switch || WAGO Interface Configuration Software || WAGO Interface Configuration App || 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
- fine stranded conductor:
- 0.2 2.5 mm / 24 12 AWG
- fire load:
- 1.391 MJ
- height:
- 110 mm / 4.331 inch
- hysteresis:
- Adjustable via DIP switch or software
- 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
- 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.Ad
- 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)
- overvoltage category:
- II
- packaging type:
- Bag
- pollution degree:
- 2
- power consumption at nominal supply voltage:
- ¤ 40 mA (+ IDO)
- power supply type:
- 24 VDC
- pull in time typ:
- 8 ms
- 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
- 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 %
- surrounding air temperature operation:
- -40 70 C
- surrounding air temperature storage:
- -40 85 C
- switching voltage do max:
- Supply voltage (applied): 0.3 V
- switching voltage max:
- AC 250 V
- temperature coefficient:
- ¤ 0.01 %/K
- temperature range of connecting cable per ul 61010 2 201 min:
- 90 C
- temperature range of the connecting cable according to en 61010 2 201:
- (Tsurrounding air + 10 K)
- 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:
- 86.500 g
- width:
- 12.5 mm / 0.492 inch
