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1.12 Block diagram
A1
11
23
33
43
53
K1
K2
A2
12
24
34
44
54
Figure 3:
Block diagram
Isolation co-ordination
Enclosure
A1/A2
material
Enclosure
-
-
material
A1/A2
4 kV BI
-
11/12
4 kV BI
-
23/24
4 kV BI
-
33/34
4 kV BI
-
43/44
4 kV BI
-
53/54
4 kV BI
-
63/64
4 kV BI
-
71/72
4 kV BI
-
Legend: BI - basic insulation, ST - safe isolation
￫
Basic insulation
(rated surge voltage 4 kV)
Mixing low voltage and SELV is not permissible. Connect
250 VAC to one of the enable contacts only if the neighboring
contact/enable current path is also carrying the same potential.
Safe isolation / reinforced insulation
(rated surge voltage 6 kV)
The reinforced insulation is designed one overvoltage category
higher than the basic insulation (e.g., with greater clearances
and creepage distances for the conductors). Accordingly, mixing
SELV circuits with V
higher voltage is possible.
ESR5-NE-51-24VDC 11/23 MN049019EN Eaton.com
63
71
Designation
A1
A2
11/12
23/24
64
72
33/34
43/44
53/54
63/64
71/72
11/12
23/24
33/34
-
-
-
4 kV BI
4 kV BI
6 kV ST 6 kV ST
-
4 kV BI
6 kV ST 6 kV ST
-
-
6 kV ST 6 kV ST
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
≤
25 VAC or V
1 Description ESR5-NE-51-24VDC
Explanation
Power supply/control 24 VDC
Power supply/control 0 V
Feedback current path, non-delayed
Enable current paths, non-delayed
Enable current paths, non-delayed
Enable current paths, non-delayed
Enable current paths, non-delayed
Enable current paths, non-delayed
Signal current path, non-delayed
43/44
53/54
63/64
-
-
-
6 kV ST
6 kV BI
6 kV ST
6 kV ST
6 kV ST
6 kV ST
4 kV BI
4 kV BI
4 kV BI
-
4 kV BI
4 kV BI
-
-
4 kV BI
-
-
-
-
-
-
≤
60 VDC and circuits with a
71/72
-
4 kV BI
4 kV BI
4 kV BI
6 kV ST
6 kV ST
6 kV ST
6 kV ST
6 kV ST
12
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