Bewator Bewacard BC610 - Selecting Connecting Cables

BC610 Installation and User manual 7
How to select connecting cables
It is important to use cables with the correct conductor gauge,
to keep the voltage drop in the cables as low as possible.
•
12 volt supplies
. A 12 V electric locking device generally
needs at least 11 V to work properly, so the voltage at the
card reader should never be less than 11 V.
• 24 volt supplies
. A 24 V electric locking device generally
needs at least 21 V to work properly, so the voltage at the
card reader should never be less than 21 V.
The recommended gauge (cross-sectional area) of the
conductor depends on the distance between the power supply
and the card reader, and on the load at the card reader.
The table below is for a Bewacard 610 with an electric
release. The total load is 300 mA at 24 V or 600 mA at 12 V.
24 V Supply
12 V Supply
Cable
length
(metres)
Min conductor
Min conductor
area
(mm
2
)
dia
(mm)
area
(mm
2
)
dia
(mm)
0-50 0.17 0.46 0.51 0.80
51-100 0.34 0.65 1.02 1.14
101-150 0.51 0.80 1.53 1.40
151-200 0.68 0.93 2.04 1.61
201-250 0.85 1.04 2.55 1.80
251-300 1.02 1.14 3.06 1.95