
Board Mountable
DC-DC Converters
IMO Series
Edition 5/5.2000
6/7
Fig. 6
Case 2"
× 1"
Weight: 50 g
Mechanical Data
Dimensions in mm. Tolerances
±0.3 mm unless otherwise specified.
European
Projection
Safety and Installation Instructions
Installation Instruction
Installation of the DC-DC converters must strictly follow
the national safety regulations in compliance with the en-
closure, mounting, creepage, clearance, casualty, mark-
ings and segregation requirements of the end-use appli-
cation.
Connection to the system shall be made via a printed cir-
cuit board according to:
Mechanical Data.
The units should be connected to a secondary circuit.
Check for hazardous voltages before altering any connec-
tions.
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.
Standards and approvals
The units have been evaluated for:
Building in
Operational insulation input to output
The use in a pollution degree 2 environment
Connecting the input to a secondary circuit which is
subject to a maximum transient rating of 1500 V.
Input Fuse
To prevent excessive current flowing through the input
supply line in case of a short-circuit across the converter
input an external fuse should be installed in a non earthed
input supply line.
We recommend a fast acting fuse
F1.6A for
24 IMO 6
F0.8A for
48 IMO 6
F3.15A for 24 IMO 12
F1.6A for
48 IMO 12
12
5
1
50.8
15.1
20.3
25.4
5
1
2
3
4
5
20.2
09112
Isolation
The electric strength test is performed as factory test in ac-
cordance with IEC/EN 60950 and UL 1950 and should not
be repeated in the field. Power-One will not honour any
guarantee claims resulting from electric strength field
tests.
Table 7: Electric strength test voltages, clearance and
creepage distances
Characteristic
Input to output
Unit
Electric strength test voltage 1 s
1100
Vrms
1500
V DC
Coupling capacitance
IMO 6 types
≈320
pF
IMO 12 types
≈2200
Insulation resistance at 500 V DC
>1000
M
Table 8: Pin allocation
Pin
Single output units
Dual output units
1Vi+
Vi+
2Vi–
Vi–
3Vo+
Vo+
4
no pin
COM
5Vo–
Vo–
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 of the DC-DC converters is IP 40.