The OMRON / Delta Tau ACC-24P is an axis expansion board that augments PMAC and Turbo PMAC motion controllers with additional servo interface circuitry. A single ACC-24P board provides four channels of encoder inputs and analog outputs via one integrated PMAC DSPGATE, with an optional second DSPGATE extending capability to eight channels. Up to four ACC-24P boards can be daisy-chained to a Turbo PMAC controller, yielding up to 32 additional axis channels. The board features 3-channel differential/single-ended encoder inputs per DSPGATE, 16-bit ±10V analog outputs, optically isolated digital I/O flags, and a 16-bit serial ADC interface. A 60-pin IDC servo connector and expansion port connector provide communication with the PMAC CPU board via flat-cable connections. Housed in a 2/3-sized PC expansion card form factor with ISA bus connector for mounting only—data communication occurs through the 50-pin expansion port, not the ISA bus. The ACC-24P integrates with PMAC PC and PMAC VME systems and can interface with companion boards including the Acc-28 (ADC), Acc-8D (terminal block), and Acc-14D (resolver input) modules.
Technical Specifications
• Encoder Inputs: 3-channel differential/single-ended per DSPGATE
• Analog Outputs: 16-bit ±10V
• Digital I/O Flags: 4 optically isolated inputs; 2 optically isolated outputs
• Serial ADC Interface: 16-bit serial ADC connection
• Servo Connector: 60-pin IDC
• Expansion Port: Dedicated connector to PMAC/Turbo PMAC CPU
• Form Factor: 2/3-sized PC expansion card; ISA bus connector (mounting only)
• Internal Architecture: 1 or 2 integrated 4-channel PMAC-style Servo ICs
– Key Features
• Single ACC-24P delivers 4 additional axis channels; ACC-24P OPT1 extends to 8 channels
• Scalable architecture: up to 4 boards stackable on Turbo PMAC for 32 total channels
• Non-Turbo PMAC supports single board attachment
• Optical isolation on all digital I/O for noise immunity
• Flat-cable connection to J2 (JEXP) on PMAC CPU board
• J5 connector requires 10-pin cable to PMAC J6 (JXIO) for operation
– Typical Applications
Multi-axis motion control systems exceeding standard PMAC channel capacity; complex automation requiring additional encoder feedback, servo command outputs, and discrete I/O signaling.
– Compatibility & Integration
Designed for PMAC PC and PMAC VME platforms. Connects via 50-pin flat cable to CPU expansion port (J2/JEXP). Compatible with Acc-28, Acc-8D (Option 1 ACC-24P via 60-pin cable), and Acc-14D interface boards.
