Why is the Maximum Allowable Common Mode Voltage Lower for Direct Input Cables in the DL850 ScopeCorder Isolation Modules?
The isolation module specifications for maximum allowable common mode voltage using direct input is 42V(DC+ACpeak).
The maximum allowable common mode voltage using the 701901(1:1) safety cable is 400V or more.
The specification written as "Direct input or cable not complying with the safety standard can be interpreted as directly inputting a cable, which is not complying with the safety standard, to the BNC input of the DL850 ScopeCorder isolation modules. The 42V specification is not a limitation of the module, but it is a human safety limitation to prevent harm to the user.
A metallic connector is an example of direct input, which is not complying with the safety standard, or a cable which is not complying with the safety standard. A metallic connecter connected to the isolated input module can potentially induce a high voltage on the metallic connecter.
Therefore the maximum common mode voltage must be less than the voltage by which we are injured from electric shock.
Related Products & Solutions
Data Acquisition (DAQ)
Scalable DAQ systems with industry-leading isolation, noise immunity, built-in conditioning, and real-time analysis, ensuring accurate, reliable measurements and faster decisions.
High Speed Data Acquisition
- PC-based, streaming, local, or remote operation
- 20+ modules, isolated and versatile inputs
- Up to 200 MS/s or 640 ch
- Used in aerospace, automotive, energy, and manufacturing industries
Isolated Oscilloscopes | ScopeCorders
- An integrated measurement system for every electromechanical application
- Modular platform combines oscilloscope and DAQ functionality
- Capture high-speed transients and low-speed trends
Oscilloscopes
Accelerate debugging and gain deeper insight with high-resolution oscilloscopes designed for speed, clarity, and precision.
Top