Balluff BIS M-370-000-A02, Manual, Page: 46 / 198

INSTALLATION
39
2
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 Processor unit depending on the application.
2.4.1 Power Requirements
The HF-Series Processor unit requires an electrical supply voltage of 12 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 Processor units. By
positioning the power supply near the middle of the network, you can limit
voltage drop at the ends, (see par. 2.6.2 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 Processor unit Current: 366 mA @ 24 Vdc for BIS M-62_ series
Calculating Total System Current Consumption:
Total System Current Consumption = [Max Gateway Current + (Max Processor unit
Current x Number of Processor units)]
Example
A Subnet16™ network powered at 24 Vdc is composed of a BIS Z-GW-001- connecting eight
BIS M-620-067-A01-04- Processor units.
Total System Current Consumption = [0.133 A + (0.366 A X 8)] = 3.061 A