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Valueline IPC
3-30
PHOENIX CONTACT
3.8
Uninterruptable power supply
A 24 V DC uninterruptable power supply receives Alternating Current (AC) and outputs
24 V DC to a Valueline IPC (in this case). It is comprised of a power supply, switching unit
and a rechargeable battery working together in one of two modes. The first mode sources
DC voltage from the power supply so the Valueline IPC can operate when AC power is
present (often referred to as normal mode). The second mode quickly switches to the
battery and activates a "battery mode" signal (the name varies depending on the vendor)
when the AC power is interrupted, thus providing uninterrupted power to the Valueline IPC.
When fully charged, a battery should supply DC power long enough for the Valueline IPC to
read the battery mode signal and execute a user-defined shutdown procedure.
Power
Supply
Figure 3-33
Generic 24 V DC function diagram
The amount of time a battery can supply power is directly affected by battery capacity and
the current draw of the device connected to the uninterruptable power supply.
Phoenix Contact has two product lines recommended for the Valueline.
–
The TRIO-UPS... (for load currents up to 5 A) combines the power supply and
switching unit into a single housing. It uses Trio software and a USB cable to
communicate with the Valueline IPC.
–
The QUINT-DC-UPS... (for load currents up to 40 A) uses dry contacts through either
the serial port or power connector on the Valueline IPC and a generic UPS driver
included with the operating system for UPS communication (for Valueline IPCs with
Windows XP only).
Other uninterruptable power supply products may be used with the Valueline IPC but are
outside the scope of this manual. This manual references the QUINT-DC-UPS... and
TRIO-UPS... products as typical products. The procedures may be adapted to other,
similar products.
VL IPC
COM1 or
+ –
COM2
24 V DC
Switching
Unit
24 V DC
Rechargeable
Battery
2637_en_D
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