Siemens Sitrans LR260 Guia De Inicio Rapido página 21

Loop power
Typical Connection Drawing
: Loop voltage is the voltage at the terminals of the power supply (not the voltage at the
Note
terminals of the device).
-
power
loop voltage
supply
VL
+
Allowable operating area of SITRANS LR260
Loop Voltage versus Loop Resistance
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
A5E32106122 SITRANS LR260 (HART) – QUICK START MANUAL
All manuals and user guides at all-guides.com
loop resistance
RL
loop current IL
Power Supply Requirements
RL=44.6*VL - 493.4
ALLOWABLE OPERATING
15.00 20.00
Loop Voltage – VL
LR260
(30.0v,845 ohms)
AREA
25.00 30.00
Page EN-19