CW-425

Quiescent current measurement

The CW-425 offers a simple possibility to obtain highly precise measurements of the no-load and working currents of devices. The CW-425 offers a total measurement range of 0-30 A, divided into two measurement ranges 0 µA to 80 mA and 80 mA to 30 A. It is possible to switch from one measurement range to the other virtually seamlessly within a maximum of 2 µs during ongoing operations.

The measured values are transmitted via a CAN interface. Devices settings such as baud rate of the CAN bus and output transfer rate can easily be configured via CAN messages. It is possible to read in a description file (dbc file) in software tools to display the measured values. The insulation voltage of up to 1000 VDC between the measuring circuit and the control circuit offers sufficient protection for other devices in the control circuit. 

The module is available as a favourably priced top-hat rail version as well as in a rugged desktop housing that offers a higher protection class. The CW-425 is destined for automated measurement of no-load and working currents of control units, for example in automotive environments. At the same time the CW-425 is an ideal supplement for our CW-300 series designed for test bench applications.

PERFORMANCE CHARACTERISTICS

  • Single device to measure no-load and working current
  • Measurement range from 0 µA to 30 A
  • Accuracy: ± 4 digits
  • Dynamic, seamless changeover of measurement channels
  • Control via CAN bus
  • Top-hat rail housing and rugged desktop housing available

Current measurement channel

Number: 1
Measurement range: 0 μA to 30 A
Measurement range 1: 0 μA to 10 mA, relative accuracy of ± 4 Digit (1 digit is 1 μA) 
Measurement range 2: 10 mA to 80 mA, resolution 1 μA, relative accuracy ±50 μA 
Measurement range 3: 80 mA  to 30 A, resolution 1 mA, max. deviation  ± 700 mA 
Connector: Pin-connector with 4 mm laboratory plugs or 7 mm cable lug
Measuring range switch-over: Automatic switch-over between measurement ranges in 2 μs 

CAN-interface

Number: 1
Type: ISO 11898-2 (Highspeed)
CAN-Protokoll Version 2.0 A und 2.0 B, supports SAE J1939 (29-Bit-Identifier) 
Data rate: 50, 100, 125, 250, 500, 800 und 1000 kbit/s 
Termination: 120 Ω, optional activation via Jumper 
Connector: Phoenix-connector MC 1,5/2-ST-3,81 (2-pin) 

power supply

Supply voltage: 12 VDC to 24 VDC
Current consumption: 85 mA at 12 VDC
Connector: Phoenix-connector MC 1,5/3-ST-3,81 (3-pin) 

Environmental conditions

Temperature range operation: -20 °C to +65 °C 
Temperature range storage: -20 °C to +85 °C 
Relative humidity: 35 % to 85 % non-condensing

General information

Housing: 45 mm DIN-Top-hat rail housing, optional rugged desktop housing 
Dimensions (LxWxH): 126 mm x 110 mm x 35 mm
Weigth: 180 g
Calibration: DAkkS-Calibration on request
 

Back to the overview | CW-400 Series