وصف
The Allen-Bradley 1756-DICAM is a specialized digital cam switch module designed for the ControlLogix automation platform. By utilizing an onboard Motorola ColdFire CPU, this single-slot module offloads complex position-proportional logic from the primary controller, executing high-speed cam scheduling directly at the hardware layer. This autonomous operation optimizes execution rates for rotational position sensing and sequential tool triggering, reducing system latency and mechanical downtime in high-speed applications such as packaging, rotary assembly, and bottling.
Features
-
Co-Processing Architecture: Executes high-speed cam logic independently to minimize controller scan time impact.
-
High-Capacity Profiles: Supports up to 10,000 programmable cam steps for complex, non-linear mechanical profiles.
-
High-Density I/O: Features 8 field inputs and 24 sourcing (positive-switching) digital outputs.
-
Flexible Output Current: Outputs support 200 mA or 400 mA per point, depending on wiring and load requirements.
-
Dynamic Configuration: Enables rapid recipe hot-swaps without requiring firmware resets.
Applications
The 1756-DICAM is ideal for high-speed industrial machinery requiring precise, sub-millisecond switching behaviors. Common applications include:
- Rotary packaging and bottling lines
- High-speed material handling systems
- Automated assembly and stamping machinery
- Dynamic tool triggering based on rotational position
Technical Specifications
| Model |
1756-DICAM |
| Processor |
Motorola ColdFire CPU |
| Inputs |
8 |
| Outputs |
24 Sourcing (Positive-Switching) |
| Field Voltage |
24 VDC Nominal |
| Output Current |
200 mA or 400 mA per point |
| Storage Capacity |
10,000 Cam Steps |
| Operating Temperature |
0 to 55 deg C |
| Relative Humidity |
5 to 95 percent (non-condensing) |
| Chassis Slot Width |
1 Slot |
Installation Guidelines
-
ESD Precautions: Always use a grounded wrist strap when handling the module to prevent electrostatic discharge damage to internal circuitry.
-
Power Down: Ensure the ControlLogix chassis is powered down before inserting or removing the module.
-
Mounting: The module is designed for installation in any standard 1756 ControlLogix chassis. Ensure the module is fully seated and the top/bottom retaining latches are locked.
-
Wiring: Use shielded cables for field I/O to minimize EMI interference. Ensure proper grounding of the chassis backplane.
-
Environment: Maintain the module within the specified 0 to 55 deg C operating temperature range and ensure adequate ventilation within the enclosure.
FAQ
What is the primary function of the 1756-DICAM?
The 1756-DICAM acts as a high-speed co-processor for the ControlLogix system, specifically designed to handle digital cam switch functions, position sensing, and rapid output triggering independent of the main PLC scan cycle.
Can this module be used in any ControlLogix chassis?
Yes, the 1756-DICAM is a standard single-slot module compatible with all standard 1756 ControlLogix chassis series.
What type of outputs does the module provide?
The module provides 24 sourcing (positive-switching) 24 VDC outputs, capable of handling either 200 mA or 400 mA per point depending on the specific application wiring.
