This DSP based compliant stack-through module offers six (6) separate isolated Synchro/Resolver-to-Digital tracking converters, 16 TTL Digital I/O, extensive diagnostics, digital velocity outputs and optional Reference and turn counters. Each channel also produces differential incremental encoder (A&B) outputs (with programmable resolution) and a zero degree marker pulse. Commutation outputs are available for 4, 6, or 8 pole brushless DC motors that eliminate the need for Hall Effect sensors on the motor thus eliminating processor time and reducing bus traffic. Any combination of two-speed and single-speed channels can be field programmed to any ratio between 1 and 255. Ambiguity circuits maintain monotonic outputs by compensating for misalignment between the Coarse and Fine Synchros; however, the processor will set a flag when it senses that the maximum allowable misalignment of 90 /gear ratio is exceeded. This card, even when large accelerations are encountered, never loses tracking, because it incorporates the unique capability to automatically shift to higher bandwidths. The shifting is smooth and continuous with no glitches. Tracking rates are only limited to bandwidth restrictions, up to 150 rps, at 16-bit resolution. The “Latch” feature permits user to read all channels at the same time. Reading will unlatch that channel. The use of Type II servo loop processing techniques enables tracking, at full accuracy, up to the specified rate. A step input will not cause any hang-up condition. Intermediate transparent latches, on all angle and velocity outputs, assure that current valid data is always available for any channel without affecting the tracking performance of the converters. A watchdog timer is provided to monitor the processor. Resolver inputs are auto-ranging that eliminates the need to specify input voltages in advance. Part #, S/N, Date code, & Rev. are stored in non-volatile memory.
A Windows® based software support kit (SSK) including drivers and sample soft-panel application is available.