Dräger PIR 7000

22
Assembly and Installation
Figure 3:
Range of permissible signal loop impedance for devices in HART
®
multidrop operation,
depending on supply voltage
04023886_01_en.eps
supply voltage at the terminals of the gas transmitter [V]
loop resistance [Ω]
50
0
100
200
300
400
500
600
10
min. 230 Ω at 30 V
max. 500 Ω at 30 V
min. 230 Ω at 9 V
max. 500 Ω at 9 V
15 20 25 30 35
permissible impedance range of the signal loop
during HART multidrop operation