Startup Behavior - Siemens Sitrans LR200 Instruction Manual

Curve 2 (Flameproof, Increased Safety, Explosion-proof)
400
350
300
250
200
RL = 73.53 * VL - 1338.24
150
100
(18.2V, 0 ohms)
50
0
15

Startup Behavior

Note: At startup, it can take anywhere from 25 to 55 seconds for the device to report the
actual material level.
Loop Power
Supply with 25 mA
Current Limit
Page 138 SITRANS LR200 (HART) – INSTRUCTION MANUAL
Loop Voltage versus Loop Resistance
Power Supply Requirements
Power Supply Requirements
RL = 14.88 * VL - 71.43
(21.6V, 250 ohms)
20
Loop Voltage – V
Loop Voltage - V
(Source Voltage)
Loop Power Supply
(no Current Limit)
Time (seconds)
No current limit
(30.0V, 375 ohms)
ALLOWABLE
OPERATING AREA
25
L
L
actual material level (example
value 18 mA)
Current-limited power
30
7ML19985JP02