Modbus - Overview - Siemens SITRANS LR120 Modbus Operating Instructions Manual

Technical data and dimensions
12.2 Modbus – Overview
Adjustment
Smart device
Voltage supply
Operating voltage
Power consumption without/with bus communication typ. at
•
•
Reverse voltage protection
Overvoltage protection
Dielectric strength against metallic mounting
parts
Overvoltage resistance (test impulse voltages
1.2/50 µs at 42 Ω)
Additional overvoltage arrester
Electrical protective measures
Protection rating
Altitude above sea level
Protection class
Pollution degree
Characteristics and performance data
Measuring frequency
Measuring cycle time
Step response time
Beam angle
Dielectric constant
a
With operating voltage U
b
Time span after a sudden distance change from 1 m to 5 m until the output signal reaches 90 % of the
final value for the first time (IEC 61298-2). Valid with operating voltage U
c
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
12.2 Modbus – Overview
Modbus is a bus system for connecting a host (e.g. PLC) and several slaves (e.g. field
devices).
50
12 DC
24 V DC
a
b
c
≥ 24 V DC
B
SITRANS mobile IQ
8 ... 30 V DC
150 mW/330 mW
240 mW/420 mW
Integrated
> 10 kV
> 1000 V
Due to the floating structure of the electronics
and comprehensive insulation measures generally
not necessary.
IP66/IP68 (3 bar, 24 h) acc. to IEC 60529,Type 6P
acc. to UL 50
5000 m (16404 ft)
III
4
W-band (80 GHz technology)
≤ 250 ms
≤ 3 s
4°
> 1.6
≥ 24 V DC.
B
Operating Instructions, 10/2022, 62709-76-01, A5E49829030
SITRANS LR120 Modbus