AC10
The Multiloop controller ready to go
With 12 different control strategies embedded
   - Up to 4 PID loop
   - 4 analog input and 4 analog output
   - 8 digital input and 8 digital output
   - Serial communication RS485 Modbus RTU

AC15
The dual loop multifunction and programmable controller
The freely programmable dual loop
   - Up to 4 analog input and 2 analog output
   - 8 digital input and 8 digital output
   - Serial communication RS485 Modbus RTU
   - Arcnet LAN for high speed communications among AC Stations
   - Several control strategies and wide library of function blocks available for   
     programming