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Figure 5 – Power supply and RS485 Modbus cable connection to PEM2 touch screen
4. Ensure that the Modbus cable is properly shielded and grounded as close as possible to the stator
control box. The Modbus cable shield cannot be connected to the touch screen.
5. Check for correct DC supply power and integrity of external wiring connections. Turn on power and
observe several readings, like torque, shaft speed, power etc. If not, check wiring and verify whether
the inputs are in agreement with actual value.
Important notes
Never connect cable shields at both ends to ground, but at one end only, to avoid
earth loops.
To avoid interference on the signal cables, such cables must be installed as far as
possible from electric power cables used for power supply and stator.
Ensure that the ambient temperature at the PEM2 never exceeds 55°C (131°F).
Summary of Contents for PEM2
Page 23: ...23 17 DRAWINGS Drawing 1 0897 1056...
Page 24: ...24 Drawing 2 0815 2003...
Page 25: ...25 Drawing 3 0815 2004...
Page 26: ...26 Drawing 4 0815 2014...
Page 27: ...27 Drawing 5 0815 2008...
Page 28: ...28 Drawing 6 0815 2013...
Page 32: ...32 Revision 0616 Chapter 1 1 warning added Pictures photos numbered and section links added...