Specifications

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• High protection:
- in the event of an output short
circuit, Sentry STS will block the
transfer between the two power
sources eliminating the risk of
propagating the short circuit and its
effects on the other loads;
- a back-feed control circuit will
trigger automatic protection devices
to avoid energy feeding back to one
of the inputs of the Sentry STS;
- Sentry STS has double redundant
ventilation called “fan redundancy
plus”. Thanks to this function, in the
remote possibility that two fans both
fail at the same time, the others
would still be able to dissipate the
heat generated by a nominal load at
a temperature of up to 40°C.
The fans can be hot swapped so as
to ensure no break in system
operation during the repair.
• Easy front access:
- power cable connections are easily
accessed with entry from below;
- board slots are positioned in a
dedicated area to allow rapid
diagnosis/replacement;
- all parts subject to controls,
maintenance and/or replacement.
LED FUNCTION
L1 S1 Priority source
L2 S2 Priority source
L3 S1 Present
L4 S2 Present
L5 Static Switch SS1 closed
L6 Static Switch SS2 closed
L7 Alarm indicator
L8 Output selection ON/OFF
5 function keys and LCD operations
S2
SS2S4-2
S3
S1
SS1 S4-1
3P + N
Source 1
Input
3P + N
Source 2
Input
Input
MCCB 1
Input
MCCB 2
Maintenance
Switch 2
Maintenance
Switch 1
Output
Switch 1
3P + N
Output