Abbott aim Technical & Service Manual page 89

Section 6, Troubleshooting
Table 6-6, AIM/AIM Plus Port Assignments
Port # Description
PDXO | Input to CPU for received RS-232 data.
PCX1 | Output from CPU for transmitted RS-232 data.
PDX2 | Master in, slave out, serial output from backup CPU.
PDX3 | Master out, slave in, serial input to backup CPU.
PDX4 | Serial clock input to backup CPU.
PDX5 | Slave select = 0, puts backup CPU in slave mode.
PDX7 | Indicates power switch has been turned off, 1=OFF.
AIM/AIM Plus Technical Service Manual 6-23 430-600035-002 (Rev. 11/99)