Dräger PIR 7000 Technical Handbook

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

Dräger PIR 7000 Specifications

General

Detection Principle	Infrared (IR)
Pressure Range	700 to 1300 hPa
Ingress Protection	IP66/67
Gases Detected	Hydrocarbons
Measurement Range	0 - 100 %LEL (Lower Explosive Limit) or 0 - 100 vol.%
Operating Temperature	-40 to +65 °C
Output Signal	4-20 mA
Housing Material	Stainless steel
Certifications	ATEX, IECEx, UL, CSA
Response Time	t90 ≤ 4 s