AC FAIL CIRCUIT
Red LED indication on front panel
.
Relay contacts for AC fail “Normally open” or “Normally closed”.
GENERAL APPLICATION NOTES and WARNINGS
WARNING: THERE ARE NO USER SERVICEABLE PARTS INSIDE. HAZARDOUS VOLTAGES EXIST INSIDE THE UNIT. SERVICE AND REPAIR
MUST BE REFERRED TO QUALIFIED FACTORY PERSONNEL.
NOTE:
The individual user should take care to determine, prior to use or installation, whether this device is suitable, adequate or safe for the use
intended. Since individual applications are subject to great variation, DuraComm makes no representation or warranty as to the merchantability,
suitability or fitness of these units for any specific application.
NOTE:
The precision regulated power supplies operate internally from voltages in excess of 12/24/48 volts. In rare cases, voltage spikes or transients
on the AC power line, or over heating, may cause a component failure in the power supply. Overloading the output will cause the over current feature to
operate. In either case, the cause must be determined and corrected.
Failures require investigation as to cause and/or repair of the unit
.
INSTALLER NOTES
NOTE:
The outputs are NOT referenced to the chassis. The Modular System can be used either positive or negative ground.
NOTE: DO NOT
block any of the cooling vents on the sides or top and always allow adequate ventilation by not installing the unit inside tightly closed
spaces. Physical mounting position is not critical but the cooling vents and the internal thermostatically controlled cooling fans must not be blocked.
RU2-3012-UPS wiring layout
This system setup will provide continuous power to the load while AC power is on. There is a seamless transfer of the load to the battery when the AC
power goes off. The LVD will disconnect the battery if the voltage drops below 11.5 VDC. The battery reconnects once AC power is restored and voltage
reaches 12.5 VDC.
Recommended Copper Wire Size for Current Capacity
(Insulated Wire, Single Conductor in free air)
Current Level in Amperes
<7 AMPERES
Wire Size
20 AWG Up to 5 feet
18 AWG Up to 10 feet
14 AMPERES
18 AWG Up to 5 feet
16 AWG Up to 10 feet
20 AMPERES
16 AWG Up to 5 feet
14 AWG Up to 10 feet
30 AMPERES
14 AWG Up to 5 feet
12 AWG Up to 10 feet
40 AMPERES
12 AWG Up to 5 feet
10 AWG Up to 10 feet
50 AMPERES
10 AWG Up to 5 feet
8 AWG Up to 10 feet
70 AMPERES
8 AWG Up to 5 feet
6 AWG Up to 10 feet
100 AMPERES
6 AWG Up to 5 feet
RU2-3012-UPS
Load
NO COM NC
AC Fail
NO=Normally Open
NC=Normally Closed
COM=Common
