Allen-Bradley 1769-L23E-QBFC1B CompactLogix Packaged Controller
Configured for real-time discrete and analog signal execution in industrial automation networks, the Allen-Bradley 1769-L23E-QBFC1B (1769-L23E-QBFC1B Programmable Automation Controller) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L23E-QBFC1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 2.00 lbs (0.91 kg) |
| Dimensions | Standard CompactLogix Packaged Form Factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 24 VDC |
| User Memory | 512 KB (Battery-Backed RAM via 1769-BA) |
| Non-volatile Memory | Not Supported |
| Embedded Discrete I/O | 16 x 24 VDC Inputs, 16 x 24 VDC Outputs |
| Embedded Analog I/O | 4 x Inputs (Differential/Single-Ended), 2 x Outputs (Single-Ended) |
| Specialized I/O | 4 x High-Speed Counters |
| Network Interfaces | 1 x Ethernet RJ45 Port (10/100 Mbps), 1 x RS-232 Serial Port (9-pin) |
| Supported Protocols | EtherNet/IP (CIP, TCP/IP), Serial (DF1, ASCII) |
| I/O Expansion | Up to 2 x 1769 Compact I/O Modules (No expansion banks supported) |
Backplane Bus Communication Velocity and EtherNet/IP Performance
The 1769-L23E-QBFC1B processes embedded I/O channels directly on its internal execution bus while extending deterministic CIP packet bridging through its integrated 10/100 Mbps EtherNet/IP interface. Utilizing non-volatile firmware logic structures, the controller scales local I/O density by hosting up to two additional 1769 expansion modules directly on the primary rack without intermediary bus extension cables. Ethernet interface velocity and RS-232 serial driver latencies are governed by firmware flash compatibility standards to maintain synchronized program execution across distributed node architectures.
Frequently Asked Questions
Q: How is memory retained on the 1769-L23E-QBFC1B during power interruptions?
A: Program memory is maintained via battery-backed RAM using an internal 1769-BA lithium battery. The controller does not support non-volatile memory cards. Battery replacement must be performed while 24 VDC system power is applied to prevent memory loss.
Q: What is the maximum I/O expansion capability for this packaged controller?
A: The 1769-L23E-QBFC1B supports a maximum of two (2) local 1769 Compact I/O expansion modules mounted directly adjacent to the controller chassis. Additional expansion banks or bank-to-bank cables are not supported.
Q: Which communication protocols are supported on the built-in serial port?
A: The embedded 9-pin RS-232 serial port supports DF1 full-duplex, DF1 half-duplex, and ASCII protocols at baud rates up to 19.2 Kbps using a 1756-CP3 communication cable.
Field Installation Guidelines
- Secure the unit to a grounded DIN rail or panel-mount directly using M4 mounting hardware. Verify that the DIN rail bonding path maintains a low-impedance ground braid connection to functional earth (FE).
- Maintain a minimum vertical and horizontal spacing clearance of 50 mm (2 inches) around the chassis to support passive thermal heat sink dissipation profiles.
- Wire digital and analog signal conductors using separate cable raceways to avoid cross-talk suppression failures. Ground signal cable shields at a single point near the panel entry terminal.
- Route 24 VDC main power supply conductors using stranded copper wire rated for 75 deg C or higher, ensuring correct polarity connection at the primary power terminal strip.
- Terminate the local 1769 bus structure by locking the right-side bus connector and securing the end cap assembly prior to applying system power.
Allen-Bradley 1769-L23E-QBFC1B CompactLogix Packaged Controller
Allen-Bradley 1769-L23E-QBFC1B CompactLogix Packaged Controller
Configured for real-time discrete and analog signal execution in industrial automation networks, the Allen-Bradley 1769-L23E-QBFC1B (1769-L23E-QBFC1B Programmable Automation Controller) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L23E-QBFC1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 2.00 lbs (0.91 kg) |
| Dimensions | Standard CompactLogix Packaged Form Factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 24 VDC |
| User Memory | 512 KB (Battery-Backed RAM via 1769-BA) |
| Non-volatile Memory | Not Supported |
| Embedded Discrete I/O | 16 x 24 VDC Inputs, 16 x 24 VDC Outputs |
| Embedded Analog I/O | 4 x Inputs (Differential/Single-Ended), 2 x Outputs (Single-Ended) |
| Specialized I/O | 4 x High-Speed Counters |
| Network Interfaces | 1 x Ethernet RJ45 Port (10/100 Mbps), 1 x RS-232 Serial Port (9-pin) |
| Supported Protocols | EtherNet/IP (CIP, TCP/IP), Serial (DF1, ASCII) |
| I/O Expansion | Up to 2 x 1769 Compact I/O Modules (No expansion banks supported) |
Backplane Bus Communication Velocity and EtherNet/IP Performance
The 1769-L23E-QBFC1B processes embedded I/O channels directly on its internal execution bus while extending deterministic CIP packet bridging through its integrated 10/100 Mbps EtherNet/IP interface. Utilizing non-volatile firmware logic structures, the controller scales local I/O density by hosting up to two additional 1769 expansion modules directly on the primary rack without intermediary bus extension cables. Ethernet interface velocity and RS-232 serial driver latencies are governed by firmware flash compatibility standards to maintain synchronized program execution across distributed node architectures.
Frequently Asked Questions
Q: How is memory retained on the 1769-L23E-QBFC1B during power interruptions?
A: Program memory is maintained via battery-backed RAM using an internal 1769-BA lithium battery. The controller does not support non-volatile memory cards. Battery replacement must be performed while 24 VDC system power is applied to prevent memory loss.
Q: What is the maximum I/O expansion capability for this packaged controller?
A: The 1769-L23E-QBFC1B supports a maximum of two (2) local 1769 Compact I/O expansion modules mounted directly adjacent to the controller chassis. Additional expansion banks or bank-to-bank cables are not supported.
Q: Which communication protocols are supported on the built-in serial port?
A: The embedded 9-pin RS-232 serial port supports DF1 full-duplex, DF1 half-duplex, and ASCII protocols at baud rates up to 19.2 Kbps using a 1756-CP3 communication cable.
Field Installation Guidelines
- Secure the unit to a grounded DIN rail or panel-mount directly using M4 mounting hardware. Verify that the DIN rail bonding path maintains a low-impedance ground braid connection to functional earth (FE).
- Maintain a minimum vertical and horizontal spacing clearance of 50 mm (2 inches) around the chassis to support passive thermal heat sink dissipation profiles.
- Wire digital and analog signal conductors using separate cable raceways to avoid cross-talk suppression failures. Ground signal cable shields at a single point near the panel entry terminal.
- Route 24 VDC main power supply conductors using stranded copper wire rated for 75 deg C or higher, ensuring correct polarity connection at the primary power terminal strip.
- Terminate the local 1769 bus structure by locking the right-side bus connector and securing the end cap assembly prior to applying system power.
