AF2 - Shelf Controller for CompactPCI Systems

The AF2 is a space-saving shelf-controller adapter board (SHC) which can be implemented in MEN's CompactPCI or CompactPCI Serial systems to add basic management functionality such as system startup, shutdown, temperature and power supply monitoring, fan control and management of the uninterruptible power supply.

The AF2 consists of a small adapter board with the microcontroller which is connected to the backplane and from there to a second, optional, board which can be installed on the front of the system to indicate system status via LEDs and provide a power button.

The AF2 supports up to three fans and three PSUs, two of which can be uninterruptible power supplies (UPS). Depending on the UPS charging state the system can be shut down or the system start delayed.

The firmware and the configuration of the AF2 shelf controller can be updated in the field via a USB maintenance port or through the host interface.


  • Monitoring and control of basic shelf functions in a CompactPCI and CompactPCI Serial system:
  • Displays system status via LEDs
  • Provides system status via I2C
  • Automatic fan speed control
  • CPU startup and shutdown
  • Adaptable to different system configurations


Shelf Controller (SHC) Functionality
  • Informs application software about:
    • External voltage status
    • Power supply failures
    • Power supply voltage levels
    • Temperature
    • Fan speed and status
    • UPS charging level
  • Controls fans based on temperature
  • Forces system shutdown in case of
    • abnormal temperature
    • exhausted UPS charge
  • Delays system start if
    • UPS charge too low
    • Temperature too low
Control Panel
  • LEDs for indicating system status and failures
    • System status
    • UPS precharge status
    • Powered by UPS
    • Voltage fail
    • Fan fail
    • Temp fail
  • Power button
  • PSU
    • PS_ON and Power Fail signal
  • UPS
    • I2C interface compliant with MEN internal protocol
  • Fan
    • 4-wire pulse width modulation (PWM) controlled fan
  • CPU
    • PWRBTN input recommended
USB 2.0 Mini USB connector for programming
Electrical Specifications
Supply voltage/power consumption:
  • +5 V (+/-25%) from at least one system PSU, 0.1 A max.
Mechanical Specifications
  • Dimensions:
    • SHC: 7.5 cm x 1.2 cm
    • Control Panel: 7.5 cm x 2 cm
  • Weight
    • SHC: 4 g
    • Control Panel: 6 g
Environmental Specifications
  • Temperature range (operation):
    • -50°C to +100°C
  • Temperature range (storage): -40°C to +85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300 m to +3000 m
  • Shock: 50 m/s², 30 ms (EN 61373)
  • Vibration (function): 1 m/s², 5 Hz - 150 Hz (EN 61373)
  • Vibration (lifetime): 7.9 m/s², 5 Hz - 150 Hz (EN 61373)
  • Conformal coating on board model 08AF02-00
5 525 876 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • Flammability (PCBs)
    • UL 94 V-0
  • Fire Protection according to EN 45545
Software Support