HBK AED 9101D, Руководство по эксплуатации, Страница: 25 / 104

23
AED
ELECTRICAL CONNECTION
6.4 Connecting the supply voltage
Notice
The transducer connection must always be assigned – to resistors if necessary – before
you switch on the supply voltage.
The required power supply is an extra-low voltage (max. 30 V
DC
) with protective separa­
tion from the mains. The current consumption depends on the level of the power supply
and decreases with a higher supply voltage.
You can route the power supply lines together with the interface leads in a single cable,
or use a separate cable. If several AEDs are supplied via one cable, pay attention to the
voltage drop via this cable, and ensure that the supply voltage to the AEDs does not get
too low. The voltage drop depends on the supply current and the cable resistance.
6.4.1 Power supply to AED9101D
2
16
1
15
+6
…
30 V
0 V
KL4
Fig. 6.7 Connecting the power supply; the shield is optional
The maximum current consumption is:
I
max
¬
100mA
)
Bridge excitation voltageU
B
+
5V
Bridge resistanceR
B