Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L24ER-QBFC1B |
| Brand | Allen-Bradley |
| Product Type | CompactLogix Controller |
| Product Line | CompactLogix |
| UPC | 885630101255 |
| Onboard User Memory | 768 KB |
| Maximum Number of Tasks | 32 |
| Programs per Task | 1,000 per task |
| Internal Energy Storage | Supported |
| Battery Requirement | Not required |
| Ethernet Network | Supported |
| DLR Topology | Supported |
| Linear Topology | Supported |
| Traditional Star Topology | Supported |
| Local I/O Module Capacity | Up to 4 Compact I/O modules |
| Maximum Ethernet Nodes | 8 |
| Controller Connections | 256 |
| Weight | 2.75 lbs (1.25 kg) |
Controller Processing and Memory
The controller provides 768 KB of onboard user memory for storing control logic, program instructions, and related project data. It supports up to 32 tasks, with a maximum of 1,000 programs per task. This task structure allows engineers to organize control routines according to machine functions and execution requirements.
Ethernet Communication
The 1769-L24ER-QBFC1B supports Ethernet communication and three network topologies: Device Level Ring (DLR), linear, and traditional star. Meanwhile, its capacity for up to 8 Ethernet nodes and 256 controller connections defines the communication resources available for connected devices and control operations.
Local I/O Configuration
In addition to Ethernet connectivity, the controller supports up to four Compact I/O modules. This local expansion capacity allows users to configure additional input and output points according to the control system requirements. Therefore, the required I/O module count and available controller connections should be considered during system configuration.
Frequently Asked Questions
Q: Does the 1769-L24ER-QBFC1B require a battery?
A: No. The supplied specifications identify this controller as not requiring a battery. It also supports internal energy storage.
Q: How many Compact I/O modules can the controller support?
A: The controller supports up to four Compact I/O modules for local I/O expansion.
Q: Which Ethernet network topologies does this controller support?
A: It supports DLR, linear, and traditional star topologies. The controller also supports up to 8 Ethernet nodes and 256 controller connections.
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