40 YEARS OF PROVEN ACCURACY
The size, color, method of operation and installing to a control panel of the AD-4401A remains the same as the AD-4401.
Interface connectors retain compatibility so even when updating from AD-4401 to AD-4401A previously connected devices can continue to be used without changing any connectors.
Functions have been added but the default settings remain identical to the AD-4401
Product # Description AD-4401A-01 Parallel BCD output (open collector) AD-4401A-03 RS-422 / 485 input / output AD-4401A-04 RS-232C input / output AD-4401-06 Setpoint unit AD-4401A-07 Analog output (4-20mA) AD-4401-10 Stainless steel side panel