553BTechnical specifications
A.5 Digital signal modules (SMs)
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
691
Table A- 60 Digital outputs
Model
SM 1222
DQ 8 x Relay
SM 1222 DQ8 RLY
Changeover
SM 1222
DQ 8 x 24 VDC
Number of outputs
8
8
8
Type
Relay, dry contact
Relay change over
contact
Solid state - MOSFET
(sourcing)
Voltage range
5 to 30 VDC or 5 to 250
VAC
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 10K Ω load
--
--
0.1 VDC max
Current (max.)
2.0 A
2.0 A
0.5 A
Lamp load
30 W DC/200 W AC
30 W DC/200 W AC
5W
ON state contact resistance
0.2 Ω max. when new
0.2 Ω max. when new
0.6 Ω max.
Leakage current per point
--
--
10 μA max.
Surge current
7 A with contacts closed
7 A with contacts closed 8 A for 100 ms max.
Overload protection
No
No
No
Isolation (field side to logic)
1500 VAC for 1 minute (coil
to contact)
None (coil to logic)
1500 VAC for 1 minute
(coil to contact)
500 VAC for 1 minute
Isolation resistance
100 MΩ min. when new
100 MΩ min. when new
--
Isolation between open contacts
750 VAC for 1 minute
750 VAC for 1 minute
--
Isolation groups
2
8
1
Current per common (max.)
10 A
2 A
4 A
Inductive clamp voltage
--
--
L+ minus 48 V, 1 W
dissipation
Switching delay
10 ms max.
10 ms max
50 μs max. off to on
200 μs max. on to off
Maximum relay switching frequency
1 Hz
1 Hz
--
Lifetime mechanical (no load)
10,000,000 open/close
cycles
10,000,000 open/close
cycles
--
Lifetime contacts at rated load
100,000 open/close cycles 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)
Last value or substitute
value (default value 0)
Number of outputs on simultaneously 8
8
8
Cable length (meters)
500 m shielded, 150 m
unshielded
500 m shielded, 150 m
unshielded
500 m shielded, 150 m
unshielded