Siemens SIWAREX WT241 - Digital I;O and Clock

Technical specifications
12.1 Technical specifications
SIWAREX WT241
Manual, 05/2015, A5E36046748A 173
Digital outputs (DQ)
The set value is output at the digital output in case of a fault or SIMATIC CPU stop.
A freewheeling diode has to be installed at the consumer with inductive loads at the digital
output.
Table 12- 4 Technical specifications: Digital outputs
Quantity
4 (high-side switch)
Supply voltage range
19.2 V DC to 28.8 V DC
Max. output current per output
0.5 A (ohmic load)
Max. total current for all outputs
2.0 A
Refresh rate (FW)
100
Switching delay
typ. 25 µs turn On
typ. 150 µs turn off
RDSON
< 0.25 Ω
Short-circuit proof
yes
Electrical isolation
500 V AC
Cable length (meter)
Max. 500 m shielded, 150 m unshielded
Digital inputs (DI)
Table 12- 5 Technical specifications: Digital inputs
Number of inputs
4
Rated voltage
24 V DC
Supply voltage range
max. 30 V DC
Power consumption at 24 V DC
4 mA
Voltage surge
35 V DC for 0.5 s
Logical signal level 1 (min)
15 V DC at 2.5 mA
Logical signal level 0 (max)
5 V DC at 1.0 mA
Sampling rate (FW)
10 ms
Filtering
0.2, 0.4, 0.8, 1.6, 3.2, 6.4 and 12.8 ms
Electrical isolation
500 V DC
Real-time clock
Table 12- 6 Technical specifications: Real-time clock
Accuracy at 25 °C
± 60 s/month
Buffered period
typ. 10 days at 25 °C
min. 6 days at 40 °C