User Manual OUT MiniModul
outmm_manual.doc 2010-03-25
page 16/28
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6
INSTALLATION
6.1
Hints for power supply
CSM OUT MiniModul is realized using a low-power design. In addition with the genuine CSM
cable (very low voltage-drop on the power lines) and the miniaturized geometry of the devices,
a simple and straight-forward installation is possible in most cases.
When choosing the power supply strategy, the following parameters are relevant:
►
minimum power supply voltage
This is the minimal value of the voltage supplied by the power supply. In automotive applica-
tion, this is usually the vehicle's on-board supply system (e.g. "12 V" for passenger cars).
Note that the minimum value is relevant. In a "12 V" system this value can be as low as 5V
(for several milliseconds) during starter operation.
►
number of OUT MiniModul devices
Each device needs electrical power to operate (see technical data in chapter 9.1). During
power-up a temporary inrush current is drawn, which may exceed the average operating cur-
rent. The power supply must be able to provide
enough current for all connected devices
.
►
cable length
The resistance of the connection cables cause a voltage drop along the cable, which depends
on the cable length and the current through the cable. The
voltage at last device
in a supply
chain must be within the specified range (6.5 V or higher, see technical data in chapter 9.1).
For typical applications CSM recommends the following installation:
►
supply voltage
≥
12 V, total cable length
≤
10 m:
power consumption of connected
OUT MiniModuls may range up to 15 W
►
supply voltage
≥
8 V,
total cable length
≤
10 m: power consumption of connected
OUT MiniModuls may range up to 10 W
(
refer to chapter 9.3 Power Consumption)
