Gotting HG G-21934, Руководство пользователя

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Components and Operation
HG G-21934
Revision 04 (English), Date: 26.04.2016 7
2.2.2 Track Guidance Generator HG 57400
2.2.2.1 Frequency Setting
2.2.2.2 Loop Current and Impedance
Long loop: Impedance 0 to 75

Short loop: Impedance 0 to 15

For short loops the loop current can be up to 600 mA
eff
. By long loops the maximum
currant is 300 mA
eff
. In this case the definition long or short loop is not based on the
actual length of the loop but on the chosen connections.
In general when a loop is connected to the outputs loop end long and loop start, with
a loop current of 300 mA
eff,
the actual loop can be as long as is wished up to a maxi-
mum impedance of 75

.
By higher currents more than 300 mA
eff
the outputs „loop short“ and „loop start“ have
to be used. The maximum impedance here is 15

for a 600 mA
eff
loop current.
A load impedance greater than 75

can be compensated by connecting a conden-
sator to the circuit board. In order to do so the loop has to be connected to the output
„loop end long compensated“. The capacity of the condensator has to be worked out
individually from case to case.
Position of the
HEX switch
Frequency/Hz
Position of the
HEX switch
Frequency/Hz
0 5050 8 7000
1 5100 9 7500
2 5150 A 7800
3 5200 B 8000
4 5700 C 8500
5 6000 D 9000
6 6300 E 9500
7 6500 F 10000
Table 2
Frequency Setting