Balluf BIS M-41 Series, Technical Description Manual

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INSTALLATION
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2.4 POWER & WIRING
The information presented below is provided to assist the installer in determining the amount
of power that will be required by the BIS M-41_ Compact processor depending on the
application.
2.4.1 Power Requirements
The BIS M-41_ Compact Processor (except USB models), requires an electrical supply
voltage of 10 to 30 Vdc. Use a regulated power supply that is capable of delivering the
requirements listed in the Technical Features.
For point-to-point or individually powered slave nodes, the calculation is straight forward. The
calculation becomes more complex for network power sources.
The following information is provided to assist you in determining the power requirements of
an RFID network application, in particular a Subnet16™ network.
NOTE
Power is applied directly to the Subnet16™ Network trunk and distributed
through drop cables to the Gateway and RFID compact processors. By
positioning the power supply near the middle of the network, you can limit
voltage drop at the ends, (see par. Fehler! Verweisquelle konnte nicht
gefunden werden. for network layout diagrams).
2.4.2 Total System Current Consumption
NOTE
The current consumption values of each product are given in the Technical
Features paragraph of the relative Installation manual and refer to the min
and max input voltage range. These values already include an adequate
safety margin. The consumption values given in the following examples have
been interpolated for an input voltage of 24 Vdc.
Max Gateway Current: 200 mA @ 12 Vdc (133 mA @ 24 Vdc).
Max Compact Processor Current: 87 mA @ 24 Vdc for BIS M-41_
Calculating Total System Current Consumption:
Total System Current Consumption = [Max Gateway C (Max Compact Processor
Current x Number of Compact Processors)]
Example
A Subnet16™ network powered at 24 Vdc is composed of a BIS Z-GW-001_ connecting
eight BIS M-410-067-001-04-S92 Compact Processors.
Total System Current Consumption = [0.133 A + (0.087 A X 8)] = 0.829 A