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14 Technical Data
14.1 24 V power supply
14.2 Power supply from S7 back-plane bus
14.3 Load cell connection
SIWAREX FTA
An isolated function low voltage (according to EN60204-1) is to be ensured by
the system power supply.
Rated voltage
Static upper / lower limits
Dynamic upper / lower limits
Non-periodic over-voltages
Max. current consumption
Typical assembly power loss
Table 14-1
Data: 24 V power supply
Current consumption from S7-
300 back-plane bus
Table 14-2
Data: Power supply from S7 back-plane bus
EU type certification as non-automatic weighing
instrument, class III
Precision with Ex-i-Interface
Error limits conforming with DIN1319-1 from
measurement range end value at 20 °C + 10 K
Refresh rate internal / external
Internal resolution
3 measuring ranges
Max. distance to load cell (calibratable)
Max. distance from load cell to Ex-i-Interface in
Ex range
Lowest permitted input signal for a calibration value
in calibrating operation
Load cell power Voltage
Current
DC 24 V
DC 20.4 V/28.8V
DC 18.5 V/30.2 V
DC 35 V for 500 msec
with a recovery time of 50 sec.
500 mA
7.5 W
Typical 55 mA
3 x 6000 d (pi = 0.4)
3 x 6000 d (pi = 0,5)
Measurement range 1m V/V: =
0,01 %
Measurement range 2/4mV/V: =
0,005 %
2.5 msec/10 msec
16 million parts
0 to 1 mV/V
0 to 2 mV/V
0 to 4 mV/V
1000 m (500 m)
150/500 m for gas group IIC
1000 m for gas group I
(see SIWAREX IS manual)
= 0.5 µV/e
Type DC 10.2 V *
= 184 mA
Technical Data
IB
14-183
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