Siemens SITRANS L 260 Schnellstartanleitung Seite 21

Loop power
Typical Connection Drawing
Note
terminals of the device).
Allowable operating area of SITRANS LR260
A5E32106122
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: Loop voltage is the voltage at the terminals of the power supply (not the voltage at the
-
power
loop voltage
supply
VL
+
Loop Voltage versus Loop Resistance
Power Supply Requirements
1000
900
800
700
600
500
400
(17.8v, 300 ohms)
300
RL=272.7*VL - 4554.1
200
100
(16.7v, 0 ohms)
0
10.00
SITRANS LR260 (HART) – QUICK START MANUAL
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loop resistance
RL
loop current IL
(30.0v,845 ohms)
RL=44.6*VL - 493.4
ALLOWABLE OPERATING
15.00 20.00
Loop Voltage – VL
LR260
AREA
25.00 30.00
Page EN-19