Product Description
Product Overview
- Manufacturer: Allen-Bradley
- Model/Part Number: 1769-L23E-QB1B
- Model Type: CompactLogix 512KB Ethernet Digital I/O Controller
- Description: The 1769-L23E-QB1B is a CompactLogix controller with 512 KB of user memory, designed for Ethernet-based communication. This model is equipped with Digital I/O (DI/O) and supports serial communication for remote I/O expansion. Ideal for small to medium-sized applications requiring Ethernet connectivity and reliable digital I/O control.
Key Features
- 512 KB User Memory for program storage
- 3 I/O Expansion Modules support (limited by current draw)
- Ethernet Communication: Integrates seamlessly with EtherNet/IP and DF1, DH-485, ASCII serial communication
- RS-232 Serial Port for additional connectivity (DF1, DH-485, and ASCII protocols)
- Basic Insulation Type Isolation with 30V continuous isolation
- No optional non-volatile memory, relying on standard memory
- Mounting Flexibility: Can be mounted on DIN rail or panel
Technical Specifications
| Attribute | Specification |
|---|---|
| User Memory | 512 KB |
| Optional Nonvolatile Memory | None |
| Number of Expansion I/O Modules | 3 (limited by current draw) |
| Replacement Battery | 1769-BA |
| Current Draw @ 5V DC | 1000 mA |
| Current Draw @ 24V DC | 700 mA |
| Power Dissipation | 7.01 W |
| Isolation Voltage | 30V continuous, type-tested at 710V DC for 60s |
| Serial Communication Ports | CH0 - RS-232, DF1, DH-485, ASCII (fully isolated) |
| Serial Communication Speed | Max 38.4 Kbps |
| Weight | Approx. 0.91 kg (2 lb) |
| Slot Width | 1 |
| Module Location | DIN rail or panel mount |
| Mounting Screw Torque | 1.1–1.8 N•m (10–16 lb•in) |
| Wire Category | 2 on signal ports, 2 on power ports, 2 on communication ports |
| Wire Size (DC Power) | 0.25–2.5 mm² (22–14 AWG) solid or stranded copper wire |
| Wire Size (Discrete I/O) | 0.5–0.8 mm² (20–18 AWG) solid or stranded copper wire |
| Wire Size (Embedded Analog/High-Speed Counter) | 0.5–0.8 mm² (20–18 AWG) shielded copper wire |
| North American Temperature Code | T3C |
| Enclosure Type Rating | None (open-style) |
Applications
- Ethernet-based Automation: Best suited for Ethernet/IP connected systems.
- Digital I/O Control: Effective for controlling and monitoring discrete digital inputs and outputs in small to medium automation systems.
- Compact Systems: Ideal for compact control systems that require limited expansion (supports up to 3 expansion I/O modules).
- Remote I/O Applications: Works well with remote I/O expansions using serial communication ports (RS-232).
- General Automation: Suitable for various applications that require reliable memory, power dissipation, and modular I/O expansion.
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