Data Sheet for Product

7/10
Siemens Differential pressure sensor QBM3020.. / QBM3120.. CA1N1916en01
Smart Infrastructure 2019-10-09
Technical data
Power supply
Safety extra low voltage (SELV/PELV)
or class
2 (UL)
Operating voltage
AC 24 V ±15 %, 50/60 Hz or DC 13.5...33 V
Power consumption
<0.5 VA
Current draw
<10 mA
External supply line protection
Fuse slow max. 10 A
or
Circuit breaker max. 13 A
Characteristic B, C, D according to EN 60898
or
Power source with current limitation of max. 10 A
Output voltage
DC 0 ...10 V
Burden (R
Load
)
>10 k
Ω
Output Not galvanically separated, 3-wire connection,
short-circuit proof, protected against reverse
polarity
Operating voltage
for ohm loads of up to 500 Ω
DC 8...33 V
DC 18…33 V
Power consumption
<0.7 VA
Current draw
4...20 mA
Output
4...20 mA
R
Load
<
A0.02
V8 VoltageSupply −
[ Ω ]
2-wire technology (inherently short-circuit proof
and reversed polarity protected)
Measuring range
Refer to "Type summary"
Sensing element
Piezo-resistive (silicone membrane, ceramic bar)
Measuring accuracy at recommended mount-
ing position and 20 °C ambient temperature
(FS = Full Scale)
for QBM3x20-10, -10D, -25, -25D
− Zero point, end value
<±0.7 % FS
−
Sum from linearity, reproducible and
hysteresis
<±0.6 % FS
− TC zero point
<±0.04 % FS/°C
− TC sensitivity
<±0.02 % FS/°C
for QBM3x20-5, -5D
− Zero point, end value
<±0.7 % FS
−
Sum from linearity, reproducible and
hysteresis
<±1 % FS
− TC zero point
<±0.04 % FS/°C
− TC sensitivity
<±0.05 % FS/°C
for QBM3x20-3. -3D
− Zero point, end value
<±0.7 % FS
−
Sum from linearity, reproducible and
hysteresis
<±1 % FS
− TC zero point
<±0.05 % FS/°C
− TC sensitivity
<±0.05 % FS/°C
Electrical interface
QBM3020-..
3-wire connection
QBM3120-..
2-wire connection
Functional data