The Allen-Bradley 1785-L40C15 is a high-capacity PLC-5/40C ControlNet processor CPU module designed for advanced industrial automation systems requiring deterministic network performance and large-scale distributed control. As part of Rockwell Automation’s ControlNet-enabled PLC-5 family, this controller integrates powerful processing capability with real-time ControlNet communication architecture.
It is widely used in large manufacturing plants, process industries, and mission-critical automation environments where synchronized I/O scanning, high-speed data exchange, and stable multi-rack control are required. The “C15” designation indicates its ControlNet communication capability, making it suitable for high-speed, scheduled industrial networks.
Technical Specifications (including Dimensions & Weight)
| Parameter | Specification |
|---|---|
| Product Type | PLC-5/40C ControlNet Processor CPU Module |
| Series | PLC-5 ControlNet (C-Series) |
| Processor Type | High-performance standard processor |
| User Memory | 48 Kilowords SRAM |
| Memory Backup | Battery-backed SRAM |
| Network Protocol | ControlNet + DH+ + Remote I/O |
| ControlNet Type | Dual-media redundant network support |
| Communication Ports | 1 × ControlNet, 2 × DH+/Remote I/O, 1 × Serial |
| Serial Interface | RS-232 / RS-422 / RS-423 |
| Max Total I/O | Up to 2048 I/O points (system dependent) |
| Max Chassis Support | Large distributed multi-rack architecture |
| Backplane Current | ~3.3 A @ 5V DC |
| Heat Dissipation | ~59 BTU/hr |
| Installation | 1771 PLC-5 Chassis |
| Operating Temperature | 0°C to 60°C |
Physical Dimensions & Weight
| Item | Value |
|---|---|
| Size (L × W × H) | 280 × 140 × 50 mm |
| Weight | ~1.25 kg |
Recommended Related Models
- 1785-L30B – PLC-5/30 processor (non-ControlNet)
- 1785-L40B – standard PLC-5/40 processor
- 1785-L46C15 – ControlNet version with protected memory
- 1785-L80C15 – high-end ControlNet PLC-5 CPU
- 1785-ENET – Ethernet communication module for PLC-5 migration
Popular Allen-Bradley Models
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