Siemens S7-1200 - Page 841

Technical specifications
A.2 CPU 1211C
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
841
Table A- 17 Digital outputs
Technical data
CPU 1211C AC/DC/Relay and
CPU 1211C DC/DC/Relay
CPU 1211C DC/DC/DC
Number of outputs 4 4
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
1
1
Inductive clamp voltage
--
L+ minus 48 VDC, 1 W dissipation
Maximum relay switching frequency
1 Hz
--
Switching delay (Qa.0 to Qa.3) 10 ms max. 1.0 μs max., off to on
3.0 μs max., on to off
Pulse Train Output rate Not recommended
1
100 kHz (Qa.0 to Qa.3)
2
, 2 Hz min.
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
4 at 60 °C horizontal, 50 °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.