Siemens SIWAREX WP251 Manual page 205

Electrical isolation
Cable length
Image 13-1
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 13- 5
Quantity
Supply voltage range
Max. output current per output
Max. total current for all outputs
Refresh rate (FW)
Switching delay
RDSON
Short-circuit proof
Electrical isolation
Cable length (meter)
Digital inputs (DI)
Table 13- 6
Number of inputs
Rated voltage
Supply voltage range
Power consumption at 24 V DC
Voltage surge
Logical signal level 1 (min)
Logical signal level 0 (max)
Sampling rate (FW)
Filtering
Electrical isolation
SIWAREX WP251
Manual, 12/2015, A5E37203357A
Current ranges for signal level according to Namur recommendation NE43
Technical specifications: Digital outputs
Technical specifications: Digital inputs
13.1 Technical specifications
500 V AC
max. 100 m, twisted and shielded
4 (high-side switch)
19.2 V DC to 28.8 V DC
0.5 A (ohmic load)
2.0 A
100
typ. 25 µs turn on
typ. 150 µs turn off
< 0.25 Ω
Yes
500 V AC
Max. 500 m shielded, 150 m unshielded
4
24 V DC
max. 30 V DC
4 mA
35 V DC for 0.5 s
15 V DC at 2.5 mA
5 V DC at 1.0 mA
10 ms
0.2, 0.4, 0.8, 1.6, 3.2, 6.4 and 12.8 ms
500 V DC
Technical specifications
205