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QM8 HANDBOOK
60950-1: Series modules
For SB, SC and DM modules, all outputs are SELV except under the following circumstance: Outputs
connected in series are non-SELV if, using the formula below, V
V
= (n-1) × V
Total
outmax
Where n is the number of seriesed outputs
Where X is taken from the table below
Where V
is taken from the table below
outmax
SC modules
Voutmax
5
5.5
12
13.2
24
26.4
36
39.6
48
52.8
SB modules
Voutmax
3.3
3.63
5
5.5
12
13.2
15
16.5
18
19.8
24
26.4
28
30.8
48
52.8
DM modules
Voutmax
12
16.1
24
28.8
For DH modules, all outputs are SELV except under the following circumstance: Outputs connected in series
are non-SELV if, using the formula below, V
V
= (2× V
×1.3) + (n-2) × V
Total
outmax
Where n is the number of outputs connected in series
DH modules
Voutmax
12
13.8
15
17.25
24
27.6
27
31
+X
OVP (%
V
)
outnom
140
140
130
140
125
OVP
(% V
)
outnom
140
140
140
140
140
130
140
125
OVP
(%
V
)
X
outmax
135
21.7
135
38.8
is found to be >60Vdc
Total
outmax
OVP (%
V
outmax
130
130
130
130
is found to be >60Vdc
Total
X
7
16.8
31.2
50.4
60
X
4.62
7
16.8
21
25.2
31.2
39.2
60
)
Page 24 of 40
260401-05 July 2019
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