S o n o m a U s e r M a n u a l
100
C H A P T E R T E N
SHOCK/ENERGY HAZARD
Install in Restricted Access Location.
Use 10-14 AWG copper wire only.
Terminal block screw torque: 9 lb-in (1 n•M).
Branch circuit must have circuit breaker, 15A or less.
Power must be sourced via two pole disconnect device.
Install terminal block cover after wiring.
Dual-Redundant Power Supplies
Any combination of Universal AC and/or DC supplies is available. Primary and secondary power
supplies are connected in a dual-redundant conguration with hitless automatic primary-to-secondary
and secondary-to-primary switchover.
A fault detector monitors the status of each redundant power supply. When a fault is detected it will
trigger a system alarm. When Sonoma is congured with Dual Power Supplies, an alarm will show if
the primary or secondary supply does not have power connected.
Masking Dual Power Supply Fault Alarms
You can mask the Primary and Secondary Faults to prevent them from causing a system alarm.
Masking a fault will prevent it from causing the Alarm LED and Alarm Output (if any) from going
active. Masking a fault will NOT prevent it from showing on the front-panel System Faults display
or in the cdmastat command.
To mask the fault, traverse to the Faults Menu, then select PwrFltMask. Or, you can use the console
commands pwrfltmask and setpwrfltmask. Parameters are either Masked or Enabled. Setting
this command to Masked will prevent a power supply fault from creating an alarm condition. The
factory default setting is Enabled.
Command: pwrfltmask
Sonoma reply: Primary Power Input Fault Alarm is MASKED
Secondary Power Input Fault Alarm is ENABLED
Command: setpwrfltmask MASKED MASKED
Sonoma reply: Primary Power Input Fault Alarm Mask set to MASKED
Secondary Power Input Fault Alarm Mask set to MASKED
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