Magnetic Autocontrol MHTM MicroDrive, Руководство по эксплуатации

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Barrier MHTM
TM
MicroDrive
Design notes for induction loops
52 5815,5001US / Version 02.66
Arrangement of truck/
passenger car loops
Mag00076
2
3
4
1
ca. 3.28 ft
(1.00 m) ca. 4.92 ft
(1.50 m)
ca. 3.28 ft
(1.00 m)
3.28 ft
(1.00 m)
ca. 3.28 ft
(1.00 m)
ca. 4.92 ft
(1.50 m)
ca. 3.28 ft
(1.00 m)
3.28 ft
(1.00 m)
Fig. 13: Lorry/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.
 Outer and inner loop can be both connected with one detector
channel, as the case may be.
 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

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

