• 2 PB24 24-position cards with barrier terminals at the interface end and edge connectors at the controller end
• 14 type IDC5 DC input modules, accept 10-36V DC
  
• 14 type ODC5 DC output modules, up to 3A at 60V DC output
  
• 2 PBCF24100 adapter modules - include octal bus transceiver ICs that interface between the I/O modules and computer-level logic.  

Most external wiring was stripped.  The common bus that links the module low sides together was left in place. 

Unit was removed from service in working condition.