Allen-Bradley 1756-DICAM Digital Cam Switch Module

The Allen-Bradley 1756-DICAM is a dedicated Digital Cam Switch module designed for integration within the ControlLogix automation environment. By leveraging an integrated Motorola ColdFire CPU, this module functions as an autonomous co-processor, offloading high-speed position-based logic from the main controller. This design ensures rapid execution of cam scheduling, effectively reducing system latency and improving the precision of sequential operations in high-speed industrial environments.

Features

• Onboard Processing: Utilizes a Motorola ColdFire processor to execute high-speed switching tasks independently of the PLC scan cycle.
• High-Density I/O: Supports 8 field inputs and 24 sourcing (positive-switching) digital outputs.
• Large Profile Storage: Capable of storing up to 10,000 programmable cam steps, facilitating complex mechanical profiles and rapid recipe transitions.
• Flexible Output Current: Outputs support 200 mA or 400 mA current levels, depending on specific wiring and load requirements.
• Reduced Latency: Enables sub-millisecond switching behaviors to enhance throughput in precision machinery.

Applications

The 1756-DICAM is specifically suited for applications requiring high-speed rotational position sensing and sequential tool control, including:

• Rotary assembly and packaging lines.
• Bottling and material handling systems.
• High-speed manufacturing where mechanical down-time must be minimized.

Technical Specifications

Installation Guidelines

• Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-DICAM module to prevent electrical damage.
• The module is designed for an open-type chassis; ensure the enclosure provides adequate protection against environmental contaminants.
• Maintain proper ventilation to keep the ambient temperature within the 0 to 55 deg C operating range.
• Use appropriate shielded cabling for field I/O to minimize EMI interference, especially in high-speed switching applications.
• Verify that the external power supply for the 24 VDC field voltage is properly grounded and fused according to local safety standards.

FAQ

Is the 1756-DICAM compatible with all ControlLogix chassis? Yes, this module occupies a single slot in any standard 1756 ControlLogix chassis.

Can the module handle non-linear cam configurations? Yes, the large internal memory capacity allows for the storage of highly irregular or non-linear cam profiles.

Does the module require external power for the outputs? Yes, the 24 VDC sourcing outputs require an external field power supply connected to the module's terminal block.