Loop Power; Typical Connection Drawing; Allowable Operating Area Of Sitrans Lr200 - Siemens Sitrans LR200 Instruction Manual

Loop power

Typical Connection Drawing

Note: Loop voltage is the voltage at the terminals of the power supply (not the voltage
at the terminals of the device).
loop voltage
VL

Allowable operating area of SITRANS LR200

Curve 1 (General Purpose, Intrinsically Safe, Non-incendive)
900
800
700
600
500
(17.8V, 300 ohms)
400
300
RL = 272.7 * VL - 4554.1
200
100
(16.7V, 0 ohms)
0
15
7ML19985JP02
loop resistance
RL
power
supply
loop current IL
Loop Voltage versus Loop Resistance
Power Supply Requirements
Power Supply Requirements
RL = 44.6 * VL - 493.4
17 19 21
Loop Voltage - V
Loop Voltage – V
(Source Voltage)
SITRANS LR200 (HART) – INSTRUCTION MANUAL
LR200
(30.0V, 845 ohms)
ALLOWABLE
OPERATING AREA
23 25 27
L
L
29
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