Siemens S7-1200 - Page 851

Technical specifications
A.3 CPU 1212C
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
851
Table A- 36 Digital outputs
Technical data
CPU 1212C AC/DC/Relay
and DC/DC/Relay
CPU 1212C
DC/DC/DC
Number of outputs 6 6
Type
Relay, dry contact
Solid state - MOSFET (sourcing)
Voltage range
5 to 30 VDC or 5 to 250 VAC
20.4 to 28.8 VDC
Logic 1 signal at max. current
--
20 VDC min.
Logic 0 signal with 10 KΩ load
--
0.1 VDC max.
Current (max.)
2.0 A
0.5 A
Lamp load
30 W DC / 200 W AC
5 W
ON state resistance
0.2 Ω max. when new
0.6 Ω max.
Leakage current per point
--
10 μA max.
Surge current
7 A with contacts closed
8 A for 100 ms max.
Overload protection
No
No
Isolation (field side to logic) 1500 VAC for 1 minute (coil to contact)
None (coil to logic)
500 VAC for 1 minute
Isolation resistance
100 MΩ min. when new
--
Isolation between open contacts
750 VAC for 1 minute
--
Isolation groups
2
1
Inductive clamp voltage
--
L+ minus 48 VDC, 1 W dissipation
Switching delay (Qa.0 to Qa.3) 10 ms max. 1.0 μs max., off to on
3.0 μs max., on to off
Switching delay (Qa.4 to Qa.5) 10 ms max. 50 μs max., off to on
200 μs max., on to off
Maximum relay switching frequency
1 Hz
--
Pulse Train Output rate Not recommended
1
100 kHz (Qa.0 to Qa.3)
2
, 2 Hz min.
20 kHz (Qa.4 to Qa.5)
2
Lifetime mechanical (no load)
10,000,000 open/close cycles
--
Lifetime contacts at rated load
100,000 open/close cycles
--
Behavior on RUN to STOP Last value or substitute value
(default value 0)
Last value or substitute value (default
value 0)
Number of outputs on simultaneously 3 (no adjacent points) at 60 °C horizontal or 50 °C vertical
6 at 55 °C horizontal, or 45 °C vertical
Cable length (meters) 500 m shielded,
150 m unshielded
500 m shielded,
150 m unshielded
1
For CPU models with relay outputs, you must install a digital signal board (SB) to use the pulse outputs.
2
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.