Siemens SIMATIC S7 Functional Safety Manual page 186

Technical specifications
A.3 Fail-Safe signal module (SM) technical specifications
Table A- 61 Power supply (L+, M)
Model
Voltage range
Surge voltage
Input current
Isolation (L+, M to S7-1200 internal logic and Ground)
Hold up time (loss of power)
Internal fuse, not user replaceable
Reverse polarity protection
Table A- 62 Digital outputs
Model
Number of outputs
Type
Voltage range
Output current:
Continuous thermal current
•
Minimum load current
•
Current per common
Current per module (maximum) – all output circuits
ON state contact resistance
Wire break monitoring
Short-circuit protection of output
Overload protection of output
Isolation (output circuits to logic)
Isolation (output circuits to power supply)
Isolation (circuit to circuit on same output)
Isolation (output to output)
Isolation groups
Inductive clamp voltage
On delay time
186
SM 1226 F-DQ 2 x Relay
20.4 VDC to 28.8 VDC
35 VDC for 0.5 s
300 mA
500 VAC for 1 min
None for outputs
•
1.0 ms at 20.4 VDC for internal power with outputs off
•
0.5 ms at 20.4 VDC with either output or both outputs on
•
1 A for internal power
Yes
SM 1226 F-DQ 2 x Relay
2 (2 circuits per output)
Relay, mechanically linked sense contact monitored internal
to module
5 to 30 VDC or 5 to 250 VAC
5 A maximum per circuit
5 mA
5 A
10A at 55 °C horizontal or 45 °C vertical
0.2 Ω maximum when new
None
None; external fuse or circuit breaker required. General pur-
pose fuse type gG per IEC 60269, 5A maximum on each
circuit.
Some application standards require derating.
None
2200 VAC for 1 min, rated for Overvoltage Category III
2200 VAC for 1 min, rated for Overvoltage Category III
2200 VAC for 1 min
Note : Circuit-to-circuit isolation (A circuit to B circuit) on the
same output is not rated to separate line voltage from SELV /
PELV.
2200 VAC for 1 min; rated for Overvoltage Category III, in-
cluding Overvoltage Category III to SELV separation or differ-
ent phase separation.
4
None; external protection required.
Typically 20 ms to both series contacts closed, including 8 ms
separation between commands to series contacts
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA