ADC Telecommunications, Inc.
150 CHAPTER 8: TIMING AND ALARM CONTROLLER MANAGEMENT
Assertion Levels
When a fault condition occurs on the fan unit or power supply, a signal is
sent to TAC indicating a fault condition. The signal that the fan unit or
power supply sends may use one of the following assertion levels:
■Active-High — Signal indicates the assertion state as a logic ONE state.
■Active-Low — Signal indicates the assertion state as a logic ZERO state.
The power supply and fan unit assertion levels are configured for the
following parameters (see Table 8-2). Assertion levels are normally set to
active-low, unless otherwise specified by the auxiliary device vendor. The
default is set to active-low.
Tabl e 8 -2 Assertion Level Parameters
Parameter Description
PS-temp Set to report the temperature of the power
supply.
DC-monitor Set to report DC current faults of the power
supply.
AC-monitor Set to report AC current faults of the power
supply.
Fan-temp Set to report temperature faults of the fan
unit.
Fan-rotation Set to report rotation faults of t he fan unit.