ElmoMC SimplIQ Digital Servo Drives-Trombone Installation Guide - Manual (Page 30)

Trombone Installation Guide Installation
MAN-TROIG (Ver. 1.403)
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3.7.2.1.b Single-Phase Direct-to-Mains Connection Topology
Figure 7: Non-Isolated Single-Phase Connection Topology
The Power Supply is connected directly to the Mains AC line.
Caution:
Do not connect VN- to PE. In a direct-to-mains connection the VN- must not be
connected to the PE, as this will cause irreparable damage to the system.
Take care and note that in a direct-to-mains connection the Neutral point is not
the most negative voltage level. It is the mid-point level of the rectified DC bus.