B25G210 Acopian Power Supplies, B25G210 Datasheet - Page 44

• Manufacturer Part Number: B25G210
• Description: AC/DC POWER SUPPLY SNGL
• Manufacturer: Acopian Power Supplies

REDUNDANT POWER PACKAGES and MODULAR REDUNDANT SYSTEMS
PAGES 44-45: Redundant Power Packages (LINEAR)
PAGES 46-47: Redundant Power Packages (SWITCHING)
PAGES 48-49: Modular Redundant Systems (LINEAR)
AC-DC
single output
Applications: Redundant Power should be considered for any equipment where the highest attainable reliability is
essential, and an unexpected loss of power would be disastrous. Such applications include communications systems (both
voice and data types), computer systems (volatile memory systems in particular), process controls, utility and municipal
systems, and security/safety alarm systems.
Output Redundancy: Each Redundant Power Package or Modular Redundant System contains two identical power
supplies with their outputs interconnected through a diode switching arrangement that will detect any fault condition, isolate
it from the system output, and pass only the output of the other supply with no interruption of output power during the
transition.
Input Redundancy: All Acopian Redundant Power Packages or Modular Redundant Systems may be operated with only
one AC power source. However, two isolated sets of AC input connections are provided, so that two independent sources
of input power may be used, to obtain the additional protection of input redundancy. A battery-backup power source (UPS)
and/or a second power line from the power utility can be used to maintain output power without interruption when your
primary source of AC power fails.
Serviceability: A defective power supply can be rapidly and safely changed while the other supply continues to furnish
uninterrupted power to the load. All input, output and alarm-contact connections are at the rear of the assembly for Rack
Mounting models or on the front for Wall Mounting models or Modular Systems. For Rack Mounting models, the chassis slides
and handles options are recommended for applications where it is desired to service the Redundant Power Package without
removing it from the rack.
Operation: The output voltage of the primary supply is set approximately 0.2 volt higher than that of the backup supply.
Under this condition, the backup supply’s diode is not forward biased; only the primary supply delivers current to the load.
If the output voltage of the primary supply decreases by more than 0.2 volt, the situation is reversed and only the backup
supply delivers load current. There is no interruption of output power during the transition.
Monitoring Circuitry: Acopian Redundants contain two voltage monitoring circuits with relays, the contacts of which are
available to control external failure alarms or other circuitry. The contact wiring of the two relays is connected in cascade, to
simulate a single set of Form C contacts which switches if the output voltage of either power supply decreases by more than
2.0 volts (3.0 volts for outputs over 48 volts) from the nominal rating.
Overvoltage Protection: Each power supply contains an overvoltage protection circuit, to assure that neither power supply
output will significantly exceed the nominal output voltage rating under any condition, including incorrect application and
misadjustment.
• Shipped Within 9 Days
• U.L. Recognized (Redundant Power Packages)
• Five Year Warranty
(Rack Mounting & Wall Mounting)
It’s easy to find what you need at www.acopian.com or www.find a power supply.com
P.O. Box 638, Easton, PA 18044 • Phone: [phone] • FAX: [phone]
Redundancy Isolation Diodes
& Output Monitor Circuits
(Three separate modules)
Connections for
Primary Source of
AC Input Power
Connections for
Primary or Backup Source
of AC Input Power
Power Supply
AC to DC
Backup
Power Supply
AC to DC
Primary
optional
Chassis
slides
42