User`s manual
UPS25 8 RTD Embedded Technologies, Inc
Chapter 1 - INTRODUCTION
This user’s manual describes the operation of the UPS25 versatile uninterruptible
power supply unit for automotive and industrial applications.
Features
Some of the key features of the UPS25 include:
• Compatible with RTD power supplies
• Wide input voltage range 10-40V DC
• Battery currents to 5 Amps
• Maximum 20W charge power with adequate cooling 75% total efficiency
• -40 to +85C ambient operating temperature
• Battery backup
• 8 Ni-MH battery cells, 24 Watt 30 min backup time
• 1500 mAh 9,6V nominal battery voltage
• 24 Watt 30 min backup time
• Discharge -10 to 65C battery temperature
• Charge 0 to 40C
• 8 Ni-Cd battery cells, 24 Watt 20 min backup time
• 1000 mAh 9,6V nominal battery voltage
• 24 Watt 20 min backup time
• Discharge -20 to 65C battery temperature
• Charge 10 to 40C
• Thermistor feedback charging process
• Complete software controlled charging process
• Main power fail interrupt with Software controlled shutdown of backup
• Adjustable backup voltage trip level
• Fully PC/104 compliant
• Part numbers:
• UPS25-1 Ni-MH battery version
• UPS25-2 Ni-Cd battery version
The following paragraphs briefly describe the major features of the UPS25. A more
detailed discussion is included in Chapter 4 (Hardware description). The board’s
installation is described in Chapter 2 (Board Installation).