![Symmetricom XLi User Manual Download Page 236](http://html.mh-extra.com/html/symmetricom/xli/xli_user-manual_1419618236.webp)
XLi Time & Frequency System
225
XLi-man, Issue 8, 6/17/2008, Rev. H
2
5
1
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
8: Power Supplies
An optional DC power supply can be used in place of the standard AC power supply. It can also be used
in conjunction with an AC power supply for redundancy. In that scenario, the XLi uses the power supply
with the highest voltage as the primary source of power, and switches to the alternate power supply as
needed.
The XLi’s internal fault detector can monitor the three output voltages from the primary and the
secondary power supplies. With the Primary Power or Secondary Power indicators in F73 enabled, a
10% decrease in any of the output voltages triggers an alarm. See
“F73 – Alarm Control / Status” on
page 94
.
Warning
: Ensure that a disconnect device, such as a switch, with the appropriate voltage/current rating,
is provided when operating/installing the XLi.
Warning
: Prior to servicing the interior of a unit with dual power supplies, remove both power cords.
Standard 110 VAC Power Supply
12 VDC Power Supply Option (87-8012-12)
Input:
Input connector:
IEC 320 connector
Input voltage range:
UL: 100 – 240 VAC
Universal, 90 – 264 VAC and 110 – 370 VDC
Input freq. range:
47 Hz – 440 Hz
Wattage:
104 watts
Power Supply Status:
The Fault Detector monitors all three output voltages and provides a visual
(panel LED) and fault status if any output voltage decreases by 10%.
Alarm Status LED:
Green LED on with no fault and AC power applied. Green LED off with fault or no
AC power applied.
Fan:
Exhaust 3-6 CFM
Input connector:
Removable three-position screw terminal block
Input voltage range:
12-18 VDC, 70 watts, 12 amps
Isolation, ground:
Input is fully floating. Either input polarity may be strapped to
chassis ground at the input terminal block.
Isolation:
Input to output: 500 VAC minimum
Fan:
Exhaust 3-6CFM
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com