Delta Tau UMAC 4096 Interpolator 1-Slot Top or Bottom Filler Panel for ACC-51E

The OMRON / Delta Tau ACC-51E UMAC 4096 Interpolator Accessory Card is a sine wave input interpolator designed to interface two (optionally four) analog quadrature encoders to Delta Tau Data System's UMAC Euro card style devices. The Acc-51E is a 3U size card that mounts in the same racks as Delta Tau's Turbo UMAC or MACRO station processors.

The Interpolator accepts inputs from two (optionally four) sinusoidal or quasi-sinusoidal encoders and provides encoder position data to the motion processor. This interpolator creates 4,096 steps per sinewave cycle. The Interpolator can accept a voltage-source (1Vp-p) signal from the encoder. A jumper selects between unterminated or 120Ω input termination.

The maximum sine-cycle frequency input is approximately 8 MHz (8,000,000 SIN cycles/sec), which gives a maximum speed of about 32.768 billion steps per second. When used with a 1000 line sinusoidal rotary encoder, there will be 4,096,000 discrete states per revolution (128,000 software counts). The maximum calculated electrical speed of this encoder would be 8,000 RPS or 480,000 RPM, which exceeds the maximum physical speed of most encoders.

The Acc-51E is considered an axis device in the UBUS backplane. Therefore, the memory map for this card is similar to the Acc-24E2x style axis cards.