Siemens S7-1200 - Page 944

Technical specifications
A.11 Digital signal boards (SBs)
S7-1200 Programmable controller
944 System Manual, 03/2014, A5E02486680-AG
Table A- 203 Digital outputs
Technical Data
SB 1223 DI 2 x 24 VDC, DQ 2 x 24 VDC
Number of outputs
2
Output type
Solid state - MOSFET (sourcing)
Voltage range
20.4 to 28.8 VDC
Logic 1 signal at max. current
20 VDC min.
Logic 0 signal with 10K Ω load
0.1 VDC 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)
500 VAC for 1 minute
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.