Description

Last Modified:Apr-99
VersaMax™ Power Supply Frequently Asked Questions

Resolution

• When do I need the power supply booster carrier?
  The power supply booster carrier (IC200PWB001) is used to mount an additional power supply in sequence with other I/O modules. Additional power supplies may be necessary depending on the number of modules and their backplane current consumption. A power supply mounted on a booster carrier provides power to all modules to its right, or until the next booster power supply.
  
  The standard power supplies (IC200PWR001 and IC200PWR101) provide backplane power for CPU, NIU, and I/O modules. They supply up to 1.5 Amps output current via 3.3 Volt and 5 Volt outputs as follows:
  • Output Current Total: 1.5 Amp maximum
  • 3.3 Volt DC Output: 0.25 Amp maximum
  • 5 Volt DC Output: (1.5 Amp - I3.3V) maximum
    This is ample power for most installations. Module backplane current consumption is summarized in Appendix C of VersaMax Modules, Power Supplies, and Carriers Manual GFK-1504.
• When do I need the expanded 3.3 Volt power supply?
  The expanded 3.3 Volt power supplies (IC200PWR002 and IC200PWR102) are for stations using I/O that require more than the 0.25 Amps supplied by the 3.3 Volt output on the standard power supplies. The expanded 3.3 Volt power supplies provide a maximum of 1.0 Amp on the 3.3 Volt output as summarized below:
  • Output Current Total: 1.5 Amp maximum
  • 3.3 Volt DC Output: 1.0 Amp maximum
  • 5 Volt DC Output: (1.5 Amp - I3.3V) maximum
• Is a different power supply required for the booster carrier?
  No. The same power supplies used with the NIU and CPU can be used as booster power supplies.
• Do booster power supplies occupy a slot?
  No. Each VersaMax station supports up to eight I/O and communication modules. Booster power supplies do not use up one of the 8 available module slots.