ControllerE M4 1Master CO - M4 SINGLE MASTER COMPATIBLE WITH AS-I 2.0/2.1/3.0. MAX 62 SLAVES. REAL TEXT STATUS INFORMATION VIA LCD DISPLAY. PUSHBUTTON INTERFACE FOR FIELDBUS AND AS-I SETUP. IN BUILT PLC CAPABILITY PROGRAMMABLE VIA RS232 PORT.. WEBSERV - ControllerE M4 1Master CO