Siemens Simatic S7 Series

Technical specifications
A.2 S7-200 SMART CPUs
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
589
Technical data
CPU ST40
DC/DC/DC
CPU SR40
AC/DC/Relay
CPU CR40
AC/DC/Relay
Isolation (field side to logic) 500 V AC for 1 minute 1500 V AC for 1 minute
(coil to contact)
None (coil to logic)
1500 V AC for 1 minute (coil
to contact)
None (coil to logic)
Isolation resistance -- 100 MΩ min. when new 100 MΩ min. when new
Isolation between open contact
--
750 V AC for 1 minute
750 V AC for 1 minute
Isolation groups
2
4
4
Inductive clamp voltage L+ minus 48 V DC, 1 W
dissipation
-- --
Switching delay (Qa.0 to Qa.3) 1.0 μs max., off to on
3.0 μs max., on to off
10 ms max. 10 ms max.
Switching delay (Qa.4 to Qb.7) 50 μs max., off to on
200 μs max., on to off
10 ms max. 10 ms max.
Lifetime mechanical (no load) -- 10,000,000 open/close
cycles
10,000,000 open/close cy-
cles
Lifetime contacts at rated load
--
100,000 open/close cycles
100,000 open/close cycles
Output state in STOP mode 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 simulta-
neously
16 16 16
Cable length (max.), in meters Shielded: 500 m
Unshielded: 150 m
Shielded: 500 m
Unshielded: 150 m
Shielded: 500 m
Unshielded: 150 m