Product Overview
The Allen-Bradley 1785-L46C15 is a PLC-5/46C ControlNet processor with protected memory, designed for demanding industrial automation tasks. As part of the Rockwell Automation PLC-5 family, this controller provides robust processing for controlling field devices in complex processes. Its protected memory safeguards critical logic, while the ControlNet network enables high-speed, deterministic communication.
Technical Specifications Breakdown
Key parameters for the 1785-L46C15 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Part Number/Catalog No. | 1785-L46C15 |
| Module Type | ControlNet PLC-5 Processor with Protected Memory |
| Processor | PLC-5/46C |
| Max User Memory Words | 48 Kilowords |
| Battery-Backed Static RAM | Yes |
| Protected Memory | Yes |
| Max Total I/O Forcible | 2048 (any mix) or 2048 in + 2048 out (complementary), Nonforcible 48000 |
| Max Analog I/O Forcible | 2048 and Nonforcible 48000 |
| I/O Scan Time Per Rack ControlNet I/O | 0.5 ms (average); Universal Remote I/O 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, 3 ms at 230.4 mbits/s |
| Max I/O Chassis Total | 125 |
| RS-232-C/422-A/423-A Ports | 1 |
| Control Coprocessor Expansion Port | Yes |
Industry Applications
For example, in assembly lines, the 1785-L46C15 manages high-speed I/O scanning with ControlNet, ensuring synchronized operation of robotic cells. In material handling systems, its protected memory prevents unauthorized logic changes, reducing downtime. The module's 48 kilowords memory supports complex programs, making it suitable for batch processing in chemical plants.
Installation & Setup Guidance
When installing the 1785-L46C15, mount it in a compatible 1771 I/O chassis. Ensure the backplane current draw of 3.3A at 5V DC is within the chassis power supply capacity. Configure the ControlNet network with proper termination and node addresses (up to 99 nodes per link with repeaters). Use the RS-232-C/422-A/423-A port for programming and diagnostics. For hot backup, integrate the 1785-CHBM cartridge as per manual instructions.
Maintenance & Reliability
To maintain reliability, keep the controller in an environment with 0-60 °C operating temperature and 5-95% non-condensing relative humidity. Inspect the battery-backed SRAM periodically to ensure program retention. The module withstands 30G operational shock and 1G vibration at 10-500 Hz. Store the unit in a clean, dry area when not in use.
Compatibility & Integration
The 1785-L46C15 integrates with ControlNet networks and supports Universal Remote I/O and DH+ communications. It is compatible with 1771, 1794, 1746, and 1791 I/O modules (8-, 16-, and 32-point). Use the 1785-ME16, -ME32, -ME64, or -M100 EEPROM for program backup. The module supports ½ slot, single slot, and double slot hardware addressing.
Selection Guide & Purchasing Advice
When selecting the 1785-L46C15, verify your system's I/O requirements and memory needs. This processor offers 48 kilowords memory and up to 2048 forcible I/O. For availability and lifecycle status, contact AutoDCSTech. We stock genuine Allen-Bradley parts to ensure reliable operation. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 1785-L46C15 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
