classiied PCMCIA module referred to as the User Data Module (UDM) is a separately provided item used to load
the system software into the ECU. The ECU is located aft of the airstair door, over the ECU Service Panel, which is
mounted to the loor.
J3 connector - EOMS Signal and Power
Provides data, power, and control to/from EOMS.
Cooling. Air is drawn through front and exited
J2 Discretes, Platform Identiication (ID).
Provides discrete signal inputs from external
J4 Serial Data, Ethernet
Provides ICMD, CI, and Ethernet data linking.
UDM Housing (with Cover Closed)
Provides holder and electrical connections for
Provides input power: 115 Vac, +28 Vdc.
J1 Input Power and Control