Siemens S7-1200 System Manual page 851

Table A- 36 Digital outputs
Technical data
Number of outputs
Type
Voltage range
Logic 1 signal at max. current
Logic 0 signal with 10 KΩ load
Current (max.)
Lamp load
ON state resistance
Leakage current per point
Surge current
Overload protection
Isolation (field side to logic)
Isolation resistance
Isolation between open contacts
Isolation groups
Inductive clamp voltage
Switching delay (Qa.0 to Qa.3)
Switching delay (Qa.4 to Qa.5)
Maximum relay switching frequency
Pulse Train Output rate
Lifetime mechanical (no load)
Lifetime contacts at rated load
Behavior on RUN to STOP
Number of outputs on simultaneously 3 (no adjacent points) at 60 °C horizontal or 50 °C vertical
Cable length (meters)
For CPU models with relay outputs, you must install a digital signal board (SB) to use the pulse outputs.
1
Depending on your pulse receiver and cable, an additional load resistor (at least 10% of rated current) may improve
2
pulse signal quality and noise immunity.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
CPU 1212C AC/DC/Relay
and DC/DC/Relay
6
Relay, dry contact
5 to 30 VDC or 5 to 250 VAC
--
--
2.0 A
30 W DC / 200 W AC
0.2 Ω max. when new
--
7 A with contacts closed
No
1500 VAC for 1 minute (coil to contact)
None (coil to logic)
100 MΩ min. when new
750 VAC for 1 minute
2
--
10 ms max.
10 ms max.
1 Hz
Not recommended
1
10,000,000 open/close cycles
100,000 open/close cycles
Last value or substitute value
(default value 0)
6 at 55 °C horizontal, or 45 °C vertical
500 m shielded,
150 m unshielded
Technical specifications
A.3 CPU 1212C
CPU 1212C
DC/DC/DC
6
Solid state - MOSFET (sourcing)
20.4 to 28.8 VDC
20 VDC min.
0.1 VDC max.
0.5 A
5 W
0.6 Ω max.
10 μA max.
8 A for 100 ms max.
No
500 VAC for 1 minute
--
--
1
L+ minus 48 VDC, 1 W dissipation
1.0 μs max., off to on
3.0 μs max., on to off
50 μs max., off to on
200 μs max., on to off
--
100 kHz (Qa.0 to Qa.3) , 2 Hz min.
2
20 kHz (Qa.4 to Qa.5)
2
--
--
Last value or substitute value (default
value 0)
500 m shielded,
150 m unshielded
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