Page 4
PPS Installation and Operating Manual
Rev. C.2 (January 19, 2018)
2.4b Status Outputs
The outputs listed in the table below are status outputs from the PPS that
indicate the operational and fault status of the PPS. BUS/GND outputs
are intended to be connected to an LED indicator. Analog outputs are
intended to be connected to equipment (e.g. analog gauges, electronic
gauges, EFIS) that utilizes shunt resistors for current measurement.
A positive output ( above reference) represents “forward
current” (i.e. battery to loads). A negative output ( below
reference) represents “reverse current” (i.e. battery charging).
Name
Description
Type
BATT DIST FAULT
Latched Over-current fault
indication
BUS/GND
ALT DIST FAULT
Latched Over-current fault
indication
BUS/GND
STARTER ACTIVE
Starter Active indication
BUS/GND
BATT
Main Battery current sense
1 mV/A relative to 7.5 V
Analog
BATT CURRENT-
Main Battery current sense
7.5 V reference
Analog
ALT
Main Battery current sense
1 mV/A relative to 7.5 V
Analog
ALT CURRENT-
Main Battery current sense
7.5 V reference
Analog
PPS output pins
The electrical characteristics of BUS/GND outputs are listed below.
Specification
Min
Typ
Max
Output Voltage
0 V
–
BUS
Output Current (at VO=BUS/2)
–
–
10 mA
Low Output Resistance
–
10 kΩ
–
BUS/GND Output Electrical Characteristics
The electrical characteristics of analog outputs are listed below. Analog
outputs are protected against shorts to GND.
Specification
Min
Typ
Max
Output Voltage
2.5 V
7.5 V
12.5 V
Scale
–
1 A/mV
–
Analog Output Electrical Characteristics
