User Manual

System Overview 2-11
Power regulator dome with I S regulator board
The us er receives a warning when the internal 12-volt IS battery
pack drops below a specified threshold (ADS recommends 7.5
volts).
External Power
The TRITON+ also can receive power from an external AC or DC
source through an external power and communications unit
(ExPAC, ADS p/n 8000-0377), external Modbus interface unit
(XBUS, ADS p/n 8000-0427), or external input/output device
(XIO, ADS p/n 8000-0400) located outsid e the manhole near the
power source. These units regulate the power co ming to the
monitor and can provide Modbus (ExPAC or XBUS) and analog
and digital input and output interfaces (XIO) between the monitor
and third-party equipment. The XBUS enclosure includ es an
ExPAC and power supply. T he XIO enclosure includes an E xPAC,
power supply, I/O module, and I/O interface terminals.