Endress+Hauser Proline Prosonic Flow B 200 - Page 22

Electrical connection Proline Prosonic Flow B 200
22 Endress+Hauser
Calculation of the maximum load
Depending on the supply voltage of the power supply unit (U
S
), the maximum load (R
B
)
including line resistance must be observed to ensure adequate terminal voltage at the device.
In doing so, observe the minimum terminal voltage (→  21)
• For U
S
= 16.0 to 16.8 V: R
B
≤ (U
S
- 16.0 V) :0.0036 A
• For U
S
= 16.8 to 23.0 V: R
B
≤ (U
S
- 12.0 V) :0.022 A
• For U
S
= 23.0 to 30.0 V: R
B
≤500 Ω
0
100
200
300
400
500
14
16 18 20
22 24
26 28 30 32
U [V]
s
R [ ]
b
W
600
220
16.8 23
34 36
1.1 1.21
35
A0018972
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"
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
S
= 17.5 V
Maximum load: R
B
≤ (17.5 V - 12.0 V) :0.022 A = 250 Ω
7.1.5 Preparing the measuring device
1. Remove dummy plug if present.
2. NOTICE! Insufficient sealing of the housing! Operational reliability of the measuring
device could be compromised. Use suitable cable glands corresponding to the degree of
protection.
If measuring device is delivered without cable glands:
Provide suitable cable gland for corresponding connecting cable (→  20).
3. If measuring device is delivered with cable glands:
Observe cable specification (→  20).