Endress+Hauser Proline Prowirl R 200 - Page 40

Electrical connection Proline Prowirl R 200 HART
40 Endress+Hauser
Increase in minimum terminal voltage
Local operation
Increase in minimum
terminal voltage
Order code for "Display; Operation", option C:
Local operation SD02
+ DC 1 V
Order code for "Display; Operation", option E:
Local operation SD03 with lighting
(backlighting not used)
+ DC 1 V
Order code for "Display; Operation", option E:
Local operation SD03 with lighting
(backlighting used)
+ DC 3 V
Order code for "Sensor version; DSC sensor; measuring tube", option DA, DB:
Mass (pressure-/temperature-compensated)
+ DC 1 V
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
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
• R
B
≤ (U
S
- U
term. min
): 0.022 A
• R
B
≤ 500 Ω
0
100
200
300
400
500
12 14 16
18 20
22 24 26 28
U [V]
s
R [W]
b
1.1 1.21
30 32 34 36
A0033472
 14 Load for a compact version without local operation
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" for non-hazardous area and Ex d
Sample calculation
Supply voltage of power supply unit:
– U
S
= 19 V
– U
term. min
= 12 V (measuring device) + 1 V (local operation without lighting) = 13 V
Maximum load: R
B
≤ (19 V - 13 V): 0.022 A = 273 Ω
The minimum terminal voltage (U
Kl min
) increases if local operation is
used.→  39→  183.