PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Edition 4/4.99
8/11
MELCHER
The Power Partners.
Mechanical Data
Dimensions in mm. Tolerances
±0.3 mm unless otherwise specified.
European
Projection
Safety and Installation Instructions
Installation Instruction
Installation of the switching regulators must strictly follow
the national safety regulations in compliance with the enclo-
sure, mounting, creepage, clearance, casualty, markings
and segregation requirements of the end-use application.
Check for hazardous voltages before altering any connec-
tions. Connections can be made using fast-on or soldering
technique.
The input and the output circuit are not separated, i.e. the
negative path is internally interconnected!
The units should be connected to a secondary circuit.
Do not open the module.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous condition. See also:
Safety
of operator accessible output circuit.
2.8 x 0.5
(1.0 x 0.5 option Y)
min. 5
12.2
8.4
4
Potentiometer
(option P)
Yellow
LED output
voltage indicator
Go–
i
R
Gi–
20.5
6.3
18.7
1.2
8.75
65
47.5
±0.2
Measuring point
of case temperature
Vi+
Vo+
50.2 ±0.2
2.7 ±0.2
70.2
±0.5
6.5
±1
25.2
±0.5
7
±0.5
09015
Fig. 7
Case A01, weight 100 g
Aluminium, black finish
and self cooling
Fig. 8
Case A01 hole locations for circuit board layout (compo-
nent side view of PCB):
- - - = Space reserved for switching regulator
“a”
= 3.0 mm x 0.7 mm slot or 3.0 mm, through
plated for hand or machine soldering (fast on)
“a”
= 1.3...1.5 mm with option Y pins
20.5
6.3
18.7
1.2
8.75
71.4
51.4
a
47.5
±0.1
65
Distance
between
M
2.5
mounting
screws
09016
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power sup-
plies are not hermetically sealed.
Protection Degree
The protection degree is IP 40, IP 20 with option P and for
PSR 52.
Isolation
Electric strength test voltage between input intercon-
nected with output and case: 750 V DC, 1 s.
This test is performed as factory test in accordance with
IEC/EN 60950 and UL 1950 and should not be repeated in
the field. Melcher will not honour any guarantee claims re-
sulting from electric strength field tests.