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Wago 857-551

Short description:WAGO’s current signal conditioner measures AC/DC currents up to 5 A, converting the input signal to a standard analog signal at the output.Features:Two isolated measurement inputs fo…

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Description

Short description:WAGO’s current signal conditioner measures AC/DC currents up to 5 A, converting the input signal to a standard analog signal at the output.Features:Two isolated measurement inputs for 1 and 5 A AC/DC(when mounted individually: 6 A AC/DC)RMS measurement or arithmetic mean valueA digital signal output reacts to configured measurement range limits (on/off switching delay and threshold value switch function can be configured with up to two threshold values).Switchable filter function3-way electrical isolation with 2.5 kV test voltage

Specification

Notes

NoteOnly the WAGO Interface Configuration Software can be used to set the measurement range of 0 to 6 A., Additional setting options via the WAGO Interface Configuration Software

Technical data - Configuration

Configuration optionsDIP switch, WAGO Interface Configuration Software

Technical data - Input

Input signal typeCurrent
Input signal (current)0 … 5 A AC/DC (IN 1; block arrangement), 0 … 6 A AC/DC (IN 1; individual arrangement)
Frequency range16 … 200 Hz
Input resistance (current input)47 mΩ (IN 1), 10 mΩ (IN 2)
Input current (max.)15 A (IN 1; 5 s); 10 A (IN 3; 5 s)
Response threshold10 mA (IN 1); 2 mA (IN 3)
Resolution (current)1 mA (IN 1); 0.5 mA (IN 3)

Technical data - Output (analog)

Output signal typeCurrent, Voltage
Output signal (voltage)0 … 5 V, 1 … 5 V, 0 … 10 V, 2 … 10 V (invertible, also bipolar)
Output signal (current)0 … 10 mA, 2 … 10 mA, 0 … 20 mA, 4 … 20 mA (invertable, also bipolar)
Load impedance (voltage output)≥ 2 kΩ
Load impedance (current output)≤ 600 Ω

Technical data - Output (digital)

Switching voltage (DO) max.Supply voltage applied
Continuous current (DO) max.100 mA (no internal restriction)
Number of switching thresholds (DO)1 or 2 (adjustable)
Configurable rise/fall delay time (DO)0 … 60 s (via software)

Technical data - Signal processing

Measurement methodTrue RMS measurement; Arithmetic mean value
Software filter (adjustable)Moving average value (filter level: 30)
Step response (typ.)60 ms (with software filter 3)
Step response (max.)250 ms

Technical data - Measurement error

Transmission error (max.)≤ 0.5 % (of the full scale value)
Temperature coefficient1 A input: ≤ 0.01 %/K (typ.); ≤ 0.02 %/K (max.); 5 A input: ≤ 0.02 %/K (typ.); ≤ 0.04 %/K (max.)

Technical data - Power supply

Nominal supply voltage U<sub>S</sub>24 VDC (SELV)
Supply voltage range±30 %
Current consumption at nominal supply voltage≤ 50 mA (+ IDO)

Safety and protection

Rated voltage300 V
Measurement category per EN 61010-2-030CAT II (input 300 VAC)
Note on insulation parametersDanger: Configuration via the service interface must only be performed with a voltage-free measurement input! The digital output (DO) operates at the supply potential.
Protection typeIP20

Safety and protection - Test voltage

Test voltage (input/analog output/supply/service interface)3 kVAC; 50 Hz; 1 min

Safety and protection - Insulation coordination

Overvoltage categoryII
Pollution degree2
Insulation type (input/analog output/supply/service interface)Double insulation (impedance and basic insulation);Requirement: The GND 1 input must not become hazardous when active and the measurement is performed as a low-side measurement!

Connection data

Connection technologyPush-in CAGE CLAMP®
Solid conductor0.08 … 2.5 mm² / 28 … 14 AWG
Fine-stranded conductor0.34 … 2.5 mm² / 22 … 14 AWG
Strip length9 … 10 mm / 0.35 … 0.39 inches

Physical data

Width6 mm / 0.236 inches
Height94 mm / 3.701 inches
Depth from upper-edge of DIN-rail97.8 mm / 3.85 inches

Mechanical data

Mounting typeDIN-35 rail

Material data

Insulation material (main housing)Polyamide (PA66)
Flammability class per UL94V0
Fire load0.013 MJ
Weight38.2 g

Environmental requirements

Ambient temperature (operation)-40 … +70 °C (at nominal current)
Ambient temperature (storage)-40 … +85 °C
Temperature range of connection cable≥ (Tambient + 34 K)
Relative humidity5 … 95 % (no condensation permissible)
Operating altitude (max.)2000 m

Standards and specifications

Conformity markingCE
EMC immunity to interferenceEN 61000-6-2, EN 61326-1
EMC emission of interferenceEN 61000-6-3; EN 61326-1
Standards/specificationsEN 61010-1

Commercial data

PU (SPU)1 pcs
Packaging typebag
Country of originDE
GTIN4055143967129
Customs tariff number85437090300

Product Classification

UNSPSC41113630
ETIM 9.0EC002475
ETIM 10.0EC002475
ECCNNO US CLASSIFICATION

Environmental Product Compliance

RoHS Compliance StatusCompliant,With Exemption
RoHS Exemption6(c), 7(a), 7(c)-I, 7(c)-II

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