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