Magnetic Autocontrol MHTM MicroDrive Access Series, Руководство по эксплуатации

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Barrier MHTM
TM
MicroDrive Access and Parking
Design notes for induction loops
5815,5013US / Version 05 47
Arrangement of truck/
passenger car loops
Fig. 12: Truck/passenger car loops
1 Safety loop truck (inductance L1)
2 Safety loop passenger car (inductance L2)
3 Opening loop truck and passenger car
4 Barrier
Observe overall inductance "L
total
". For calculation, see below.
For combined truck/passenger car loops following points must be
additionally observed:

The winding direction of the inner safety loop for passenger
cars must be identical to the outer safety loop for trucks.
Meaning, the sensitivity in the middle between outer and inner
loop is then at its maximum.

Switch outer and inner loop together on one detector channel.

The overall inductance determines, whether the truck and the
passenger car loop have to be implemented as series or as
parallel circuit. Always lead both feed lines into the barrier
housing. The overall inductance must be between 70 and
500
µ H.
Calculation of the overall
inductance for series circuits
2 1
L L Ltotal
+ =
Calculation of the overall
inductance for parallel circuits
2 1
2 • 1
L L
L L
Ltotal
+
=