Appendix C: Pinout Assignments
7705 SAR-8 Installation Guide Page 153
Fan Module Port
Figure 47 identifies the connector for the External Alarms port on the Fan module.
External Alarms Port
The External Alarms port provides access to three pairs of alarm output contacts and four
alarm inputs. All alarm interfaces are rated for 5 VDC and 100 mA (source or sink). Each
alarm input has a configurable severity associated with it
—the default is one Critical alarm
input, two Major alarm inputs, and one Minor alarm input (see Table 34). State transitions
on the inputs are debounced for 2 seconds. Refer to the 7705 SAR OS System Management
Guide for information on customizing reporting of external alarm conditions.
You can display the status of the alarm inputs using the show>chassis>environment
CLI command. Refer to the 7705 SAR OS Basic System Configuration Guide for an
example of the alarm inputs display.
The port uses a DB15 connector. You must provide an appropriate cable configured
according to your alarm panel.
Figure 48 shows the External Alarms port pin numbers.
Figure 47: Fan Module Port
FAN
Batt A
Batt B
FAN
Critical
Alarms
7705 SAR-8
ACO/LT
External
Alarms
Major
Minor
External Alarms
port
19654
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