The source of the screw terminals at the back panel of the A series cameras is Phoenix Contacts (http://www.phoenixcontact.com)

For the A320 Camera

Terminal              Order No. Type
Power                 1777989    MSTB 2,5/ 2-STF-5,08
I/O                      1827745    MC 1,5/ 6-STF-3,81

For the A20/A40 Camera

Terminal              Order No. Type
Power                 1757019   MSTB 2,5/2-ST-5,08
Digital I/O           1803617   MC 1,5/6-ST-3,81
Analog I/O          1803617    MC 1,5/6-ST-3,81