Allen-Bradley 1769-L23-QBFC1B CompactLogix PAC Processor Module
Manufacturer: Allen Bradley
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Part Number: 1769-L23-QBFC1B
Condition：New with Original Package
Product Type: CPU Processors
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-L23-QBFC1B CompactLogix Packaged Controller
The Allen-Bradley 1769-L23-QBFC1B, also cataloged as the 1769-L23-QBFC1B Packaged Controller, operates as a dedicated hardware component for integrated machine control and direct signal processing within CompactLogix network platforms. The hardware combines a central processing unit, local power supply, and an integrated I/O sub-assembly within a single physical enclosure to manage discrete, analog, and high-speed pulse networks via physical hardware pathways.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L23-QBFC1B |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 3.75 lbs (1.70 kg) |
| Dimensions | 118 x 105 x 140 mm |
| Operating Temp | 0 deg C to 60 deg C (32 deg F to 140 deg F) |
| Power Consumption | 24 VDC nominal supply input |
| User Memory | 512 KB |
| Embedded Discrete Inputs | 16 channels, 24 VDC sink/source |
| Embedded Discrete Outputs | 16 channels, 24 VDC |
| Embedded Analog Inputs | 4 channels, 0-10.5 VDC / 0-21 mA |
| Embedded Analog Outputs | 2 channels, 0-10.5 VDC / 0-21 mA |
| High-Speed Counter Inputs | 4 channels |
| Communication Ports | 2 x RS-232 serial ports |
| Supported Protocols | DF1, DH-485, ASCII |
| Vibration / Shock | 5g at 10-500 Hz / 30g operating shock |
| Expansion Capability | Maximum 2 additional 1769 modules |
| Enclosure Type | Open-type |
Local Bus Configuration and Firmware Flash Compatibility
The hardware manages all internal execution cycles using a fixed 512 KB user memory register space. System updates require verification of firmware flash compatibility to properly compile logic tasks over the internal backplane architecture. Because the unit provides integrated execution paths rather than using independent standalone modules, I/O density scaling remains bound to the physical hardware base, allowing for a maximum addition of only 2 local 1769 expansion modules. Dual integrated RS-232 serial channels sustain backplane bus communication velocity by offloading serial frames using DF1, DH-485, or raw ASCII protocol structures without adding overhead to the core processor execution loop.
Frequently Asked Questions
Q: Does this specific controller support direct connection to an EtherNet/IP network?
A: No. The 1769-L23-QBFC1B does not feature an onboard Ethernet port. All networking and data monitoring routines must proceed via the dual RS-232 serial interfaces using DF1 or DH-485 protocols. For native Ethernet connectivity, an alternative variant such as the 1769-L23E must be deployed.
Q: What wiring parameters are required for the termination blocks on this packaged unit?
A: Field terminations require copper wire rated for 90 deg C. Solid conductors must measure between 22-14 AWG, while stranded wires must fit the 22-16 AWG range. The terminal block screws must be torqued to exactly 0.68 Nm using replacement block part number 1769-RTBN18.
Field Installation Guidelines
- Mounting and Structural Clearance: Mount the assembly horizontally onto an EN 50022 compliant 35 mm DIN rail or secure it to a panel backplate with fixed mounting bolts. Maintain adequate spacing around the open-type frame to allow ambient air movement and prevent thermal buildup.
- Serial Cable Routing and Noise Suppression: Route all RS-232 serial communication paths away from high-power AC lines, variable frequency drives, and inductive loads. Use high-quality shielded serial cables to prevent electromagnetic interference from causing data drops.
- I/O Terminal Wiring: Isolate all external field power sources before inserting or removing wire leads from the terminal block. Secure the structural grounding point to a low-impedance earth bus to protect the internal analog conversion circuits.