The Allen-Bradley 1785-L60B is a high-end PLC-5/60 processor CPU module designed for large-scale, mission-critical industrial automation systems. As one of the most powerful controllers in the PLC-5 Enhanced family, it delivers maximum processing capability, extensive I/O handling, and flexible communication options for complex distributed control architectures.
Built for heavy-duty manufacturing environments, the 1785-L60B is widely used in plants that require high-speed scanning, large program capacity, and robust multi-rack coordination. It remains a cornerstone controller in many long-life legacy automation systems where stability and deterministic control are essential.
Technical Specifications (including Dimensions & Weight)
| Parameter | Specification |
|---|---|
| Product Type | PLC-5/60 Processor CPU Module |
| Series | PLC-5 Enhanced |
| Processor Type | High-performance PLC controller |
| User Memory | Up to 64K words SRAM |
| Memory Backup | Battery-backed SRAM |
| EEPROM Support | 1785-ME16 / ME32 / ME64 / M100 |
| Communication Ports | 4 × DH+ / Remote I/O + 1 × Serial |
| Serial Interface | RS-232 / RS-422 / RS-423 |
| Max Total I/O | Up to 3072 points (any mix) |
| Max Analog I/O | Up to 3072 |
| Max I/O Racks | Up to 24–27 (system dependent) |
| I/O Chassis Capacity | Up to 93 total chassis |
| Backplane Current | 3.3 A @ 5V DC |
| Operating Temperature | 0°C to 60°C |
| Vibration | 2 g @ 10–500 Hz |
| Shock | 30 g operating / 50 g non-operating |
Physical Dimensions & Weight
| Item | Value |
|---|---|
| Size (L × W × H) | 266.7 × 38.1 × 177.8 mm |
| Weight | ~1.45 kg (≈3.2 lbs) |
Recommended Related Models
- 1785-L40B – mid-high range PLC-5/40 processor
- 1785-L30B – standard PLC-5/30 controller
- 1785-L20B – mid-range PLC-5/20 CPU module
- 1785-ENET – Ethernet communication module for PLC-5 systems
- 1784-PCIC – PCI communication interface card
Popular Allen-Bradley Models
- 1756-L81E ControlLogix Processor Module
- 1769-L33ER CompactLogix Controller
- 1756-EN2T EtherNet/IP Communication Module
- 1734-AENT POINT I/O Adapter
- 1794-ACN Flex I/O Communication Adapter
