Power connection (X1)
The APBU-44C(E) is to be powered from a 24 VDC supply. Two power supplies can
be used for redundancy.
24 VDC
Power supply
24 VDC
Power supply A
24 VDC
Power supply B
+
–
+
–
+
–
R X D
T X D
B A T
P W R
1
2 4 V A
2
G N D
2 4 V D C
X 1
I N
3
2 4 V B
4
G N D
R X D
T X D
B A T
P W R
1
2 4 V A
2
G N D
2 4 V D C
X 1
I N
3
2 4 V B
4
G N D
13
Installation