Datasheet
Variations in line voltage or brief power
outages can create problems for a
control system. An power interruption
of about a second or longer often
results in loss of valuable production
time when the line is shut down.
During such an unexpected shut
down, tool damage and data loss may
occur. Although power outages are
unavoidable, the negative consequen-
ces are preventable.
The new SITOP power UPS module
automatically transfers the load up to
15 A to a battery in the event of a
power loss. Standard SITOP power
supplies 5 A –15 A can be coupled
with this UPS module and 2.5 Ah,
3.2 Ah, 7 Ah and 12 Ah maintenance-
free, rechargeable batteries. The
2.5 Ah battery was designed for -40° C
to + 60° C ambient temperatures.
As in the proven, larger 40 A SITOP
UPS Module, the new 15 A UPS DIN
rail mounted module incorporates the
same battery management function
that charges the battery to an optimal
27 V. This function maximizes the
battery life by using a charging voltage
that is independent to the load
voltage. Unlike most conventional DC
UPS systems that simultaneously
deliver 27 V to the battery and load,
this module delivers 24 V to the load
while delivering 27 V to the battery.
This stabile load voltage increases the
life of devices that have a maximum
26 V operating range. Depending on
the selected activation threshold
voltage (18 - 26 V), the UPS module
completely switches the load to the
battery without interruption during a
power outage. The buffer time can be
adjusted from 5 to 315 seconds in 10
second increments or until the battery
is fully discharged.
Standard features include comprehen-
sive protection and monitoring func-
tions. For example, relay contacts are
provided in the module to indicate the
status of battery and line power. In
addition to the floating contacts, the
status of the system is also indicated
by LEDs.
The latest developments: SITOP power
This module is also available with a RS
232 interface for PC controlled
processes. All relevant monitoring
information can be read through this
interface. For further information
concerning the PC interface, please
see the internet web site,
www.ad.siemens.de/sitop/
index_76.shtml. Free software for
this module can be downloaded from
this web site for Win 95, 98 and NT
operating systems.
SITOP 15 A DC UPS for 24 V ”Non-stop“
With diagnostics functions and PC connection