Configured for controller execution and direct I/O processing in a CompactLogix system, the Allen-Bradley 1769-L23E-QB1B (1769-L23E-QB1B CompactLogix Ethernet Controller) combines Ethernet communication, RS-232 connectivity, digital I/O, analog I/O, and high-speed I/O in a single controller assembly.

Model Identification

The supplied data identifies 1769-L23E-QB1B as a discontinued CompactLogix Ethernet/IP processor with integrated memory and mixed I/O. The listed alternate reference is 1769L23EQB1B.

Hardware Specifications

I/O and Network Architecture

The controller integrates controller processing with local digital and analog I/O. Six high-speed inputs and four high-speed outputs are separately identified within the supplied configuration, allowing the hardware to handle designated high-speed signal functions without treating those channels as standard I/O.

The Ethernet/IP interface provides network communication for the CompactLogix controller. One RS-232 port is also specified for serial communication. The supplied information does not define the exact Ethernet data rate, serial protocol configuration, or network topology, so these values are not assigned.

The 512 Kbyte memory capacity is part of the controller configuration. Firmware revision and application compatibility should be checked against the installed CompactLogix programming environment before replacement.

Integrated I/O Characteristics

The 16 digital inputs and 16 digital outputs are specified for 24 VDC operation. Four analog inputs and two analog outputs are integrated into the same controller assembly.

The supplied data does not state analog signal ranges, resolution, isolation, conversion time, or output current. These parameters should not be inferred from the channel count alone.

Ordering Configuration

• 1 x Allen-Bradley 1769-L23E-QB1B controller
• 1 x Integrated controller and I/O assembly
• No separate communication adapter is identified in the supplied product data
• No separate memory module is identified in the supplied product data

Installation and Wiring Notes

• Confirm the controller model and I/O configuration before electrical connection.
• Use the specified 24 VDC supply arrangement for the controller.
• Separate analog signal wiring from high-voltage and high-current conductors where practical.
• Use appropriate shield termination practices for analog signal cables.
• Keep Ethernet communication wiring separated from sources of significant electrical noise.
• Verify RS-232 wiring and pin assignment before connecting external serial equipment.
• Confirm digital I/O voltage compatibility before field wiring.
• Do not assume analog input or output signal ranges without consulting the applicable hardware documentation.
• Verify firmware and programming-software compatibility before commissioning a replacement controller.

Technical FAQ

• What processor family does the 1769-L23E-QB1B belong to?

  The supplied information identifies the unit as a CompactLogix Ethernet/IP processor with integrated digital, analog, and high-speed I/O.

• How much controller memory is provided?

  The specified memory capacity is 512 Kbyte. The supplied data does not define how this memory is divided between application, configuration, or other controller functions.

• How many digital inputs are integrated?

  The controller contains 16 digital inputs specified for 24 VDC operation. Six additional high-speed inputs are separately identified in the supplied configuration.

• How many digital outputs are available?

  The supplied data specifies 16 digital outputs at 24 VDC, plus four separately identified high-speed outputs.

• Does the controller include Ethernet/IP communication?

  Yes. The 1769-L23E-QB1B is identified as an Ethernet/IP processor. The supplied data does not specify its detailed network performance parameters.

• Is an RS-232 interface included?

  Yes. One RS-232 port is specified. The exact serial protocol and configuration depend on the installed application and controller configuration.

• Are analog channels integrated into the controller?

  Yes. The supplied configuration contains four analog inputs and two analog outputs. Signal range and resolution are not specified in the provided data.

• Is the operating temperature range specified?

  No. The supplied product information does not provide an operating-temperature range, so a specific temperature limit should not be assigned without the applicable technical manual.