User manual

Appendix
100
Siemens Building Technologies
Fire Safety & Security Products 01.2009
12.6.3 Connecting alarm input/output
Recommended Alarm-In connection
GND
Alarm In
Alarm
Device
Mechanical alarm input device can be used as above, and 3.3 V TTL logic can also
be used.
NOTE
The threshold voltage of alarm input is below 3.3 V.
Recommended Alarm Out connection
Mechanical alarm output device can be used as above, and connect the device to
the C (Common) and NC (Normally Closed) or C and NO (Normally Open)
connectors. NC/NO is a relay output which sinks 2A@125VAC and 1A@30VDC.