Elmo SERVO AMPLIFIER DBP SERIES - Manual (Page 71)

70
DBP - Rev 6/93
AC
AC
AC
+Vs
DC power common is internally
connected to control common
Heatsink
Fuse
Fuse
Fuse
Isolating transformer
NON-ISOLATED DBP
A. External fuses are needed for 3U size only
Guide lines for connecting a non isolated amplifier with an isolating power transformer
Ground:
DC power common
Motor chassis
Amplifier's heat sink
Do not ground:
Control common - It is internally connected to the power common. Grounding the
control common will create a ground loop.
Caution:
- If source of motor command is grounded, use amplifier's differential input.
Otherwise, a ground loop is created.