1785-L46B PLC-5 Programmable Controller
Allen-Bradley 1785-L46B is a standard PLC-5 processor with protected memory. It offers 48K words of user memory and supports up to 2048 I/O points. This controller is designed for demanding automation tasks in industrial environments. It provides reliable control and communication capabilities for complex systems.
Product Highlights
- Memory: 48 Kilowords of battery-backed static RAM. Integrated memory protection secures critical data and program logic.
- I/O Capacity: Supports up to 2048 total I/O in any mix, or 2048 inputs plus 2048 outputs in complementary mode.
- Communication Ports: Equipped with four configurable ports for DH+ or Remote I/O (adapter/scanner modes). Includes one RS-232/422/423 serial port for DF1 protocol.
- Scan Time: Fast program scan of 0.5 ms per K-word for bit logic. Remote I/O scan time is as low as 3 ms at 230.4 kbits/s.
Technical Specifications
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1785-L46B |
| Series | PLC-5 |
| Module Type | Standard Processor with Protected Memory |
| User Memory | 48 Kwords |
| Max I/O | 2048 (any mix) or 2048 In / 2048 Out |
| Communication | 4x DH+/RIO, 1x Serial (RS-232/422/423) |
| Program Scan Time | 0.5 ms/Kword (bit logic) |
| I/O Scan Time | 3 ms (230.4 kbits/s) to 10 ms (57.6 kbits/s) |
| Backplane Current | 3.0 A at 5V DC |
| Power Dissipation | 17.3 W (59.04 BTU/hr) |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Storage Temperature | -40 to 85 °C (-40 to 185 °F) |
| Relative Humidity | 5-95% (non-condensing) |
| Shock Resistance | 30G |
| Vibration Resistance | 1G at 10-500 Hz |
| Weight | 1.42 kg (3.1 lbs) |
| Certifications | UL, CSA, C-TICK, CE |
Key Features & Compatibility
- Protected Memory: Prevents unauthorized access to critical program and configuration data.
- Addressing Modes: Supports 2-slot, 1-slot, and 1/2-slot hardware addressing for flexible I/O configuration.
- Remote I/O: Supports up to 32 remote I/O chassis per link and a total of 61 I/O chassis.
- I/O Compatibility: Works with 1771, 1794, 1746, and 1791 I/O systems, including intelligent modules.
- Memory Modules: Compatible with 1785-ME32, -ME64, and -M100 EEPROM for program backup.
Installation & Maintenance
- Mounting: Installs in the left-most slot of 1771-A1B, -A2B, -A3B, or -A4B chassis.
- Keying: Uses backplane pins 40-42 and 54-56 for proper chassis connection.
- Isolation: Provides 500V to 1000V isolation between communication ports for 60 seconds.
- Diagnostics: Internal clock with timing accuracy of 1 program per scan aids in system monitoring.
Why Buy From Oiltech Controls?
- Over 15 years of expertise in industrial automation spares.
- Reliable global shipping and logistics support.
- All products are tested and verified before shipment.
- 12-month warranty for peace of mind.
- Specialized support for obsolete control systems.
Typical Applications
- Manufacturing process control and automation.
- Material handling and conveyor systems.
- Industrial machinery and production lines.
- Legacy system upgrades and replacements.
Frequently Asked Questions (FAQ)
- Q: What is the maximum I/O capacity?
A: Supports 2048 I/O in any mix, or 2048 inputs + 2048 outputs. - Q: Does it support remote I/O racks?
A: Yes, supports up to 32 remote racks per link. - Q: What type of memory is used?
A: Battery-backed static RAM for program retention. - Q: Is this controller compatible with Modicon Quantum?
A: No, this is an Allen-Bradley PLC-5. For Modicon Quantum, please visit our Modicon Quantum series.
Packaging & Delivery
- Package Includes: Controller unit, battery (1770-XYC), and documentation.
- Shipping: Worldwide delivery via FedEx, UPS, or DHL.
- Warranty: 12-month standard warranty against defects.
Contact Information
Email: info@oiltechcontrols.com
Phone: +86 158 8020 0923
Original Source: https://www.oiltechcontrols.com/
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