The 7I65 is a eight axis analog servo interface intended for operation with MESA's Anything I/O cards in motion control applications. The 7I65 has eight 16 bit DAC channels and eight TTL or differential encoder inputs.  In addition the 7I65 has eight 12 bit + sign A-D inputs, eight isolated motor enable outputs and four isolated digital inputs.  Analog outputs have software selectable ranges that include -10V to +10V, -5V to +5V, 0V to +5V and 0V to +10V.  Analog inputs also have software selectable ranges including -10V to +10V, -5V to +5V, -2.5V to +2.5V and 0V to +5V.  Input and output ranges can be selected on a channel by channel basis.  All 7I65 Analog I/O is galvanically isolated from system logic ground to prevent ground loops and digital noise from interfering with the analog signals.  A built in watchdog timer sets the analog outputs to 0V if the 7I65 has not been accessed within the settable watchdog timer interval.  An on card EEPROM allows analog gain and offset values to be stored fo software controlled calibration. The 7I65 conditions the encoder input signals with input filters for TTL inputs or RS-422 recievers for differential encoder inputs.  The controller connection is a 50 pin header that matches the pin-out of the  Anything I/O cards.  3.5 mm screw terminal compatible plugs are used for motor and misc I/O.  All pluggable screw terminal blocks are included with the 7I65.