XARTU/5™ Manual Copyright© 2013
Eagle Research Corporation
®
REV 11.1.11 Page | 9
POWER FOR THE RTU
Eagle Research provides an XA-Series UPS (uninterruptible power supply) and SPS
(solar power supply) for unit power to the RTU. The RTU typically operates on an AC
voltage power system with a 2.2 amp hour backup battery. Solar power systems with
battery backup can be designed for any application where AC is not readily available.
The sizing of solar systems depends on the geographic location, degree of sun
exposure, equipment power consumption, and site obstructions. If the main supply
fails, the unit will run on the system battery. If this should fail, an on-board backup
battery will power the unit's memory and real time clock. The on-board backup battery
can maintain history data for up to ten years. When the on-board backup power is
used, the RTU discontinues normal operation until the main power source is restored.
To power the unit with an XA-Series UPS:
[NOTE: The XARTU/5 is supplied with a remote, external power system (XAUPS
or XASPS) where the XARTU/10 has the power system mounted internally]
1. Disconnect and lock out the main AC source to be connected to the power supply
before performing any wiring (circuit breaker, disconnect switch, etc.).
2. With the main AC source disconnected and locked out, connect the AC line to the L1
(hot), L2 (neutral), and GND terminals of the PWR60 board.
3. Connect the positive and negative voltage signal wires to terminals 53 (V+) and 54
(GND) in the RTU. On the PWR60 power supply board, connect the wire from the
Output (+12V) terminal, to terminal 53 on the IOT60 board in the RTU, and the
Output (–) terminal, to terminal 54. Connect the Output LB (low battery) and the
PFS (power fail status) wires to two of the digital inputs in the RTU for low battery
and AC power failure alarms respectively.
4. Reconnect the main AC power source.
5. Toggle the SW1 switch on the IOT60 board to the ON (up) position to apply power
to the RTU.
6. When power is first applied, the display will briefly show the program version,
followed by the first assigned label. The green status LED comes on and starts to
flash. Each LED flash indicates the time it takes the processor to complete one scan
of the database.
~WARNING~
The operating voltage range for the XARTU/5 is 9-30VDC. Do NOT exceed recommended
input voltage of 30VDC.
(40 Seiten)
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