Endress+Hauser prowirl 70 - Ex I Version

Electrical
Connection
Ex i version
1
+
2
-
3
+P
I
O
+
–
ti031y46
Intrinsically safe
power supply:
12...30 V
18.5...30 V (with HART)
I
max
= 300 mA
P
max
= 1 W
Connection 4...20 mA with intrinsically safe power supply
4...20 mA
Operation with HART handheld unit possible.
Minimum 250
Ω
load resistance needed for HART communication.
1
+
2
-
3
+P
I
O
+
–
3
4
2
1
hazardous area
safe area
Power supply:
12...30 V
18.5...30 V (with HART)
Zener barriers e.g.
Stahl 9001/01-280-110-10
4...20 mA
Connection 4...20 mA with non intrinsically safe power supply and barriers
ti031y47
Operation with HART handheld unit possible.
Minimum 250
Ω
load resistance needed for HART communication.
Note: The above barrier is applicable for a completly isolated loop. Otherwise the zener barriers
shown below must be used.
1
+
2
-
3
+P
Compart DXF 351
ENDRESS+HAUSER
COMPARTDXF351
F1 F3F2
-
+ E
9
1+
2-
3
4
1
2
20 mA
4 mA
hazardous area
safe area
Zener barriers e.g. MTL 787S or
Stahl 9002/13-280-093-00
Connection PFM 2 wire current pulses with Compart flow computer and barriers
Operation with HART handheld unit not possible when using PFM output.
unscaled Vortex frequency 1...2850 Hz,
pulse width 0.18 ms
ti031y48
14