Siemens SIMATIC S7-1200 - Page 1509

Technical specifications
A.13 Digital signal boards (SBs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1509
Table A- 203 Digital outputs
Technical Data
SB 1223 DI 2 x 24 V DC, DQ 2 x 24 V DC
Number of outputs
2
Output type Solid state - MOSFET (sourcing)
Voltage range
20.4 to 28.8 V DC
Logic 1 signal at max. current 20 V DC min.
Logic 0 signal with 10K Ω load
0.1 V DC max.
Current (max.)
0.5 A
Lamp load
5 W
On state contact resistance
0.6 Ω max.
Leakage current per point
10 μA max.
Pulse Train Output (PTO) rate
20 kHz max., 2 Hz min.
1
Surge current
5 A for 100 ms max.
Overload protection
No
Isolation (field side to logic)
707 V DC (type test)
Isolation groups
1
Currents per common
1 A
Inductive clamp voltage
L+ minus 48 V, 1 W dissipation
Switching delay 2 μs max. off to on
10 μs max. on to off
Behavior on RUN to STOP
Last value or substitute value (default value 0)
Number of outputs on simultaneously
2
Cable length (meters)
500 m shielded, 150 m unshielded
1
Depending on your pulse receiver and cable, an additional load resistor (at least 10% of rated current) may improve
pulse signal quality and noise immunity.