Wago 857-552 Data Sheet
Data sheet | Item number:857-552
Current signal conditioner; Input for Rogowski coils; Current and voltage
output signal; Digital output; Configuration via software; Supply voltage: 24
VDC; 6 mm module width
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Data sheet | Item number:857-552
Item description
Short description:
The Rogowski Signal Conditioner records RMS values from alternating currents via Rogowski coil and converts the input signal into a standard
analog signal on the output side.
Features:
PC configuration interface
Supports different types of Rogowski coils
Digital switching output (configurable switching thresholds)
True RMS measurement (TRMS)
Configurable output signal
Configuration via DIP switch
Safe 3-way isolation with 2.5 kV test voltage per EN 61140
No current bar interruption during installation
Measuring range overflow indication
Note:
Additional setting options via interface configuration software or interface configuration app
Data
Technical Data
Configuration
Configuration options DIP switches
Interface configuration software
Interface configuration app
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Data sheet | Item number:857-552
Input
Input signal type Voltage
Input signal voltage 50 Hz sinusoidal signals:AC10.05mV (RC1);AC40.2mV
(RC2A);AC90mV (RC2B)
Sensitivity RC2B: 22,5 mV/kA
Measurement range, current AC500A (RC1);AC2,000A (RC2A);AC4,000A (RC2B)
Frequency range 50Hz (Sinusoidal signals)
Response threshold ≤ 1 % (of measuring range nominal value)
Resolution 250 mA (RC1); 1 A (RC2A); 1.5 A (RC2B)
Output
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 (output/voltage) ≥1kΩ
Load impedance (output/current) ≤600Ω
Output – Digital
Max. switching voltage (DO) Supply voltage applied
Max. continuous current (DO) 100mA (no internal restriction)
Number of switching tresholds (DO) 1 (adjustable)
Signal processing
Measuring procedure True RMS measurement (TRMS)
Max. operating frequency 2kHz
Software filter; adjustable moving mean value (filtering level: 30)
Step response typ. 60ms
Measurement error
Transmission error max. ≤ 1 % (of the full scale value)
Temperature coefficient ≤ 0.01 %/K
Power supply
Type of power supply 24 VDC
Nominal supply voltage U
S
DC24V
Supply voltage range ±30%
Current consumption at supply voltage ≤40mA(+ I )
DO
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Data sheet | Item number:857-552
Safety and protection:
Test voltage (input/output/supply) AC 2.5kV;50Hz;1min
Protection class IP20
Connection data
Connection technology
Push-in CAGE CLAMP
®
Solid conductor 0.08 … 2.5mm²/ 28 … 14AWG
Fine-stranded conductor 0.34 … 2.5mm²/ 22 … 14AWG
Strip length 9 … 10mm/ 0.35 … 0.39inch
Geometrical Data
Width 6mm/ 0.236inch
Height from upper-edge of DIN-35 rail 97.8mm/ 3.85inch
Depth 94mm/ 3.701inch
Mechanical data
Type of mounting DIN-35 rail
Material Data
Color light gray
Fire load 0 MJ
Weight 35.113 g
Environmental Requirements
Surrounding air (operating) temperature -25 … 70°C
Surrounding air (storage) temperature -40 … 85°C
Standards and specifications
Conformity marking 1
Commercial data
Product Group 6 (Interface Electronics)
Country of origin DE
GTIN 4050821476917
Customs Tariff No. 85437090300
Approvals / Certificates
Ex-Approvals
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Data sheet | Item number:857-552
Logo Approval Additional Approval Text Certificate name
IECEx
TUEV Nord Cert GmbH
EN 60079-0 TÜV_14_ATEX_112692_X
IECEx
TUEV Nord Cert GmbH
IEC 60079-0 IECEX_TUN_14.0030_X
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