7210 SAS-M Overview
7210 SAS-M Installation Guide Page 21
RTN refers to the negative side of the floating external power supply. This power supply must not
be connected to chassis ground and should be 18-50 volts DC at 100 ma. Please refer to Appendix ,
“Appendix C: Alarm Pin Assignments,” on page 83 for further information.
8 ALARM_IN1_EXT_+ External alarm input 1 (external relay dry contact closure
to pin 15).
9 CRIT_ALARM_NC Normally closed during Critical alarm state.
10 MJR_ALARM_CNTR Common contact for Major alarm relay.
11 MJR_ALARM_NO Normally open during Major alarm state.
12 ALARM_IN4_EXT_RTN External alarm input 4 (external relay dry contact closure
from pin 5).
13 ALARM_IN3_EXT_RTN External alarm input 3 (external relay dry contact closure
from pin 6).
14 ALARM_IN2_EXT_RTN External alarm input 2 (external relay dry contact closure
from pin 7).
15 ALARM_IN1_EXT_RTN External alarm input 1 (external relay dry contact closure
from pin 8).
Table 4: Alarm Interface Port Pinouts
Pin Name Function
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