Power Supply, Grounding, And Shielding - Panasonic HMe Series Instruction Manual

Connections

10.6 Power supply, grounding, and shielding

The power supply terminal block is shown in the following figure.
DC power connector - AWG24 wire size - R/C terminal blocks (XCFR2), female pitch 5.08mm, torque
4.5 lb-in
NOTE
Make sure that the power supply has sufficient power capacity for the operation of the product.
The product must always be grounded to earth. Grounding helps limit the effects of noise due to elec-
tromagnetic interference on the control system.
Use terminal 3 on the power supply terminal block earth connection.
The power supply circuit may be floating or grounded. In the latter case, the power source common is
connected as indicated with a dashed line in the following figure.
When using the floating power scheme, note that internally the power common is connected to the
ground with a 1MΩ resistor in parallel with a 4,7nF capacitor.
The power supply must have double or reinforced insulation. The suggested wiring for the power sup-
ply is shown in the following figure.
All the electronic devices in the control system must be properly grounded. Grounding must be per-
formed according to applicable regulations.
20