Eaton STS16. Pulsar Source Transfer Switch 16A 66027 Leaflet

Power supply redundancy 
for single-connection circuit equipment 

At present, only top-of-the-range 
servers are equipped with a dual
electrical power supply. 

In their original form the majority of
these types of equipment - including
concentrators, switches, auto-routers,
invoicing servers, SMS servers and
middle-of-the range servers - are single-
connection, that is to say they have only
one electrical input supply. With the
Pulsar STS, every rack of critical
equipment can be connected to a
redundant power supply. 
Both sources (primary and secondary)
are connected, in a very straightforward
manner, to the STS in the base of the
rack. The Pulsar STS then controls the
redundancy of this electrical power
supply. If the primary source fails,
transfer to the secondary source is
automatic and instantaneous. 

Considering its advanced design, 
the price of the Pulsar STS is highly
competitive compared with the 'dual
power supply' options available from
suppliers of computer equipment. 

1 U high, the unit can be installed very
easily in the rack. Five LEDs indicate the
status of the sources and the STS. 

Designed to provide redundancy
as close as possible to the
equipment, the Pulsar STS deploys
a ‘break before make’ technology
based on relays:

◗

in the event of a short-circuit, the
Pulsar STS ensures that the fault
cannot affect the alternative source, 
so that power continues to be
supplied to the fault-free equipment, 

◗

Power is transferred without overlap
of the sources in order to prevent
any node of reliability,

◗

Even if it suffers a fault,
the Pulsar STS continues
to supply power to the
equipment from the
remaining available
source.

Critical applications requiring 

two independent electrical sources.

Dual power supply for single-connection equipment.

source transfer 
system 

2 independent sources for 
a redundant power supply:

◗

strategic servers

◗

circuit and telecoms equipment