ABB AC 800M

Power Supply Supervision Section 2 Installation
84 3BSE 027 941 R301
Figure 22. Redundant Power Supply Powering Units and Field Equipment
OK F
OK
A+ B+ L+
SS822
F
+
+
AB
L+ L–
L+ L+ L– L–
NLPE
OK
SD821
L+ L+ L– L–
NLPE
OK
SD821
OK F
OK
A+ B+ L+
SS822
F
+
+
AB
L+ L–
L+ L+ L– L–
NLPE
OK
SD821
L+ L+ L– L–
NLPE
OK
SD821
SA
SB
L–
L+
Supervision
signals to
CPU unit via TP830
+24 V
0 V
From Mains
Breaker
Protective Ground
L–
L+
+24 V
0V
Protective Ground
Powering
Field
Equipment
Powering
Units
From Mains
Breaker