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参数资料
| 型号： | PSL486-7LIRPCDA |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 4/11页 |
| 文件大小： | 247K |
| 代理商： | PSL486-7LIRPCDA |
Rugged Environment
Switching Regulators 19"
PSL-Family
Edition 2/96 - Melcher AG
5 - 3
MELCHER
The Power Partners.
5.1
Control circuit
P (option)
Go–
Vo+
Gi–
Vi+
Input
Filter
L (option)
R/i
Io
Uo
I i
Ui
Ce
C (option)
D (option)
+
–
A (option)
Fig. 1
Block diagram
Note: Check for hazardous voltages before altering
any connections. Do not open the module. The input
and the output circuitry are not separated, i.e. the nega-
tive path is internally interconnected!
Safety and Installation Instructions
Safety
If the output circuit of a switching regulator is operator-ac-
cessible according to the IEC 950 related safety standards,
it shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected that under normal
and single fault conditions, the voltage between any two
conductors and between any conductor and earth does not
exceed 60 V DC).
In the following section an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
the output circuit. However, it is the sole responsibility of the
installer or user to assure the compliance with the relevant
and applicable safety standards.
If the following table is observed, the output of any switch-
ing regulator is considered to be an SELV circuit up to a
nominal output voltage of 36 V, or up to 48 V if option C is
fitted.
Table 2: Insulation concept for SELV circuits
Nominal
Minimum required grade
Maximum
Minimum required
Measures to achieve the
Resulting safety
mains
of isolation, to be
output
safety status of the
specified safety status
status of the
supply
provided by the AC-DC
voltage
front end output circuit
of the output circuit
switching
voltage
front end, including mains from the
regulator output
(AC)
supplied battery charger
front end
circuit
None
Battery supply completely
≤60 V
SELV battery circuit
None
SELV circuit
separated from mains
≤144 V
Hazardous voltage battery
Input fuse 1 and unearthed,
SELV circuit
circuit 2
non operator-accessible case 2
Hazardous voltage battery
Input fuse 1 and earthed output Earthed SELV
circuit
circuit 3 and earthed 3 or non
circuit
operator-accessible case
≤250 V
Basic
≤60 V
Earthed SELV circuit
Earthed input circuit 3
SELV circuit
ELV circuit
Input fuse 1 and
Earthed SELV
earthed output circuit 3
circuit
≤144 V
Hazardous voltage
Input fuse 1 and earthed output Earthed SELV
secondary circuit
circuit 3 and earthed 3 or non
circuit
operator-accessible case
Double or reinforced
≤60 V
SELV circuit
None
SELV circuit
≤144 V
Double or reinforced insu-
Input fuse 1 and unearthed and SELV circuit
lated unearthed hazardous non operator-accessible case 2
voltage secondary circuit 2
1 The installer shall provide an approved fuse (slow blow type with lowest rating suitable for the application, max. 12.5 A) in the positive
or negative input conductor directly at the input of the switching regulator. For UL's purpose, the fuse needs to be UL-listed. If option C
is fitted, a suitable fuse is built-in.
2 Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum in-
put voltage of the switching regulator (contrary to case marking: "This apparatus must be earthed.").
3 The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC 950.
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