Technical specifications
A.3 Fail-Safe signal module (SM) technical specifications
S7-1200 Functional Safety Manual
190 Manual, 02/2015, A5E03470344-AA
Table A- 64 SM 1226 F-DQ 2 x Relay (6ES7 226-6RA32-0XB0)
The two rectangular areas are yellow. These are only on
the fail-safe signal modules.
② Two LEDs per output:
• One for channel status: Green (on = output on, off =
output off)
• One for channel faults: Red (on = problem/passivated,
off = ok, blink = ready to reintegrate (activate))
③ External fuse
Note: Refer to "Digital output applications" (Page 75) for
alternate applications wiring.
External fuse or circuit breaker required
Use a general purpose fuse type gG per IEC 60269, 5A maximum on each circuit. Some
application standards require derating to exclude contact welding as a fault.
Failure to follow these installation requirements could result in death, severe personal
injury, and property damage.
Always follow these requirements when installing S7-1200 modules.
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