A4MB: AUMATIC AC 01.2 positioner and position feedback signal 0/4 - 20 mA (potentiometer in actuator), basic version, reversing contactors MODE, CLOSE, OPEN, STOP, EMERGENCY, I/O (24 V DC), 6programmable output contacts, Modbus RTU, power class A1 - A3
A4MB: AUMATIC ACExC 01.2 positioner and position feedback signal 0/4 - 20 mA (potentiometer in actuator), basic version, reversing contactors MODE, CLOSE, OPEN, STOP, EMERGENCY, I/O(24 V DC), 6 programmable output contacts, Modbus, AUMA power class
A4N: AUMATIC AC 01.2 process controller and position/torque feedback signal 0/4 - 20 mA (MWG in actuator), thyristors CLOSE, OPEN, STOP, EMERGENCY, MODE (24 V DC), 6 programmable output contacts, AUMA power class B1/B2
A4NDP: AUMATIC AC 01.2 positioner and position/torque feedback signal 0/4 - 20 mA (MWG in actuator), reversing contactors MODE, CLOSE, OPEN, STOP, EMERGENCY, I/O (24 V DC), 6 programmable output contacts, Profibus DP, AUMA power class A1 - A3
A4NFF: AUMATIC ACExC 01.2 positioner and position/torque feedback signal 0/4 - 20 mA (MWG in actuator), reversing contactors MODE, CLOSE, OPEN, STOP, EMERGENCY, I/O (24 V DC), 6 programmable output contacts, Foundation Fieldbus, AUMA power class A1 - A3
