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APM Isolation Reference

Isolation prevents electrical noise, surges, or ground faults in one part of a system from affecting other parts. This improves safety, measurement accuracy, and overall reliability. The table below shows which inputs and outputs are electrically isolated for Trumeter APM's, so you can quickly see how each product will behave in your installation.

APM Power Input Voltage Input Current Input Digital/Relay Outputs
Amp Meter N/A N/A Isolated N/A
M2 Meter Isolated N/A Isolated N/A
Power Meter Isolated Isolated (not isolated from current input) Isolated (not isolated from voltage input) Isolated
MAX M21 & M23 Isolated Isolated (not isolated from current input) Isolated (not isolated from voltage input) Isolated