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Example:
If the total current consumption of your external devices
exceeds the 700mA maximum current, then use one of the fol-
lowing system configurations:
• Power the panel with an external 12VDC power supply.
• Power some or all of the external devices with an external
power supply to lower the total external current powered by
the MPA1C1 panel below 700mA.
Power consumptions
• The maximum power available in the PoE 802.3af Power Class
3 standard is 15.4W. This limit is generally at 48VDC, and it is
measured at the output of the power injector or PoE switch.
Line losses cause a decrease in the power available at the
panel when you use longer Ethernet cable lengths. You can
minimize these line losses by using either of the following
methods:
Device Element Current
Door strike or magnetic lock current
500 mA
Reader A maximum current
100 mA
Reader B maximum current
100 mA
Buzzer or sounder current
20 mA
Door position switch
20 mA
Request to exit switch
30 mA
Total current for this example
770 mA
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