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Benign Environment
AC-DC Converters
≤100 Watt
LW Series
Edition 4/4.99
9/9
MELCHER
The Power Partners.
Cable Kits
Table 13: Cable kits (to be ordered seperately from power supply)
Position
Type of
Power
Material
Length
Wire color (and contact allocation)
at
cable kit
supply
Cross section
V1
V2
V3
V4
G
AC (L)
AC (N)
FG
AC input
CB11
LW 50
UL 1015
60 cm
–
–––
–
Black
White
Green-
side
LW 100
AWG 20
≈ 0.50 mm2
(5)
(3)
(1)
DC output
CB13
LW 50
UL 1007
60 cm
Red
Brown
Blue
Black
––
–
side
AWG 18
≈ 1 mm2
(4/5)
(1)
(3)
(2, 6, 7)
CB14
LW 100
UL 1007
60 cm
–
Brown
Orange
Blue
Black
––
–
AWG 18
≈ 1 mm2
(5)
(4)
(1)
(2, 3)
CB15
LW 100
UL 1007
60 cm
Red
–––
Black
––
–
AWG 18
≈ 1 mm2
(1, 2, 3)
(4, 5, 6, 7)
Safety of operator accessible output circuit
If the output circuit of an AC-DC converter is operator ac-
cessible, it shall be an SELV circuit according to the IEC/EN
60950 related safety standards
The following table shows a possible installation configura-
tion, compliance with which causes the output circuit of the
AC-DC converter to be an SELV circuit according to IEC/
Table 10: Safety concept leading to an SELV output circuit
Conditions
AC-DC converter
Installation
Result
Supply voltage
Grade of isolation, provided by the
Measures to achieve the resulting
Safety status of the AC-DC converter
AC-DC converter
safety status of the output circuit
output circuit
Mains
≤250 V AC Double or reinforced
Earthed frame
SELV circuit
EN 60950 up to a configured output voltage (sum of nomi-
nal voltages if in series or +/– configuration) of 44 V.
However, it is the sole responsibility of the installer to as-
sure the compliance with the relevant and applicable safety
regulations. More information is given in:
Technical Infor-
mation: Safety.
AC-DC
con-
verter
Mains
SELV
Earth connection
+
–
~
10021
Fuse
Fig. 10
Schematic safety concept
Use fuses and earth connection as per: Installation In-
structions
and table: Safety concept leading to an SELV
output circuit
.
Table 11: Safety approvals
Safety Approvals
UL 1950 CSA 1402 C
TV 1
LW 50/100
x
1 IEC/EN 60950
Protection Degree
The protection degree of the AC-DC converters is IP 20,
exept in the vicinity ot the terminal block, where it depends
on the installation.
Accessories
Connector Kits
Table 12: Connector kit specification
Type
Connector
Input
Qty.
Contacts
Qty.
Output
Qty.
Contacts
Qty.
kit designation
housing
LW 50
MLCK02
VHR-5N
1
SVH-21T-P1.1
3
VHR-7N
1
SVH-21T-P1.1
7
LW 100
MLCK02
VHR-5N
2
SVH-21T-P1.1
8
VHR-7N
1
SVH-21T-P1.1
7