Product Short Description
Manufacturer: Delta Tau Data Systems, Inc.
Product Overview:
The ACC-24E2 is a 24-axis EtherCAT motion controller chassis from Delta Tau’s ACC product line. It serves as the main controller housing for PMAC-2 series motion control boards, supporting up to 24 servo/stepper axes via EtherCAT communication. It is designed for large-scale multi-axis machines requiring high channel count and deterministic real-time control.
Description
Technical Specifications:
| Parameter | Value |
|---|---|
| Chassis Model | ACC-24E2 |
| Maximum Axes | 24 Servo Axes |
| Communication Protocol | EtherCAT (100 Mbps) |
| Processor | PMAC-2 DSP (Motorola DSP56311 @ 40 MHz) |
| Servo Update Rate | 62.5 μs to 1 ms |
| I/O Capacity | Up to 192 Digital I/O (via I/O modules) |
| Analog I/O | Up to 32 channels (via modules) |
| Memory | 2 MB Flash / 512 KB RAM |
| Power Supply | 24 VDC |
| Dimensions | Approx. 483 x 432 x 133 mm (rack-mount chassis) |
| Weight | Approx. 6.8 kg (empty) |
| Operating Temperature | 0°C to +55°C |
| Mounting | 19″ Rack Mount |
| Certifications | CE, FCC, UL |
Structural Features:
- 19-inch rack-mount enclosure (4U height)
- Modular backplane — accepts PMAC-2 controller boards and I/O modules
- EtherCAT master port — supports daisy-chain topology for up to 24 servo drives
- Fan-cooled — forced air convection
- EMI shielding — full metal enclosure
Functional Characteristics:
- 24-axis simultaneous coordinated motion
- EtherCAT distributed I/O — remote I/O nodes via EtherCAT
- PMAC C programming — full motion language support
- G-Code / CAD-CAM integration
- High-speed interpolator — 8th-order spline
Applicable Industries:
- Large CNC Machines (5-axis + simultaneous)
- Multi-robot coordination
- Flexible Manufacturing Systems (FMS)
- Aerospace Component Machining
Installation Notes:
- Requires dedicated 24 VDC power supply (min 5A recommended)
- EtherCAT network must be terminated with 120Ω at final node
- Ensure adequate airflow — minimum 10 cm clearance on all sides






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