Endress+Hauser Proline Prosonic Flow B 200 Operating Instructions Manual page 26

Electrical connection
26
Order code for "Output"
Option C : 4-20 mA HART + 4-20 mA analog
Option D: 4-20 mA HART, pulse/frequency/switch
output, 4-20 mA current input
1) External supply voltage of the power supply unit with load.
2) For device versions with SD03 local display: The terminal voltage must be increased by DC 2 V if
backlighting is used.
3) Voltage drop 2.2 to 3 V for 3.59 to 22 mA
Load
Load for current output: 0 to 500 Ω, depending on the external supply voltage of the power
supply unit
Calculation of the maximum load
Depending on the supply voltage of the power supply unit (U
including line resistance must be observed to ensure adequate terminal voltage at the
device. In doing so, observe the minimum terminal voltage
• For U = 16.0 to 16.8 V: R
S
• For U = 16.8 to 23.0 V: R
S
• For U = 23.0 to 30.0 V: R
S
R [ ]
W
b
600
500
400
300
220
200
100
0
14 16 18
16.8
1 Operating range
1.1 For order code for "Output", option A "4-20 mA HART"/option B "4-20 mA HART, pulse/frequency/switch
output" with Ex i and option C "4-20 mA HART + 4-20 mA analog"
1.2 For order code for "Output", option A "4-20 mA HART"/option B "4-20 mA HART, pulse/frequency/switch
output" with non-Ex and Ex d
Sample calculation
Supply voltage of the power supply unit: U
Maximum load: R ≤ (17.5 V - 12.0 V): 0.022 A = 250 Ω
B
7.1.5 Preparing the measuring device
1. Remove dummy plug if present.
terminal voltage
• For 4 mA: ≥ DC 16 V
• For 20 mA: ≥ DC 12 V
3)
≤ (U - 16.0 V): 0.0036 A
B S
≤ (U - 12.0 V): 0.022 A
B S
≤ 500 Ω
B
1
20 22 24 26
23
= 17.5 V
S
Proline Prosonic Flow B 200 HART
Minimum Maximum
terminal voltage
DC 30 V
≥ DC 12 V
DC 35 V
), the maximum load (R
S
1.1 1.2
28 30 32 34 36
35
Endress+Hauser
)
B
U [V]
s
A0018972