1769-L24ER-QBFC1B Allen-Bradley CompactLogix Controller

1769-L24ER-QBFC1B Allen-Bradley Packaged I/O Controller Stock 750KB

1769-L24ER-QBFC1B Allen-Bradley Packaged I/O Controller Stock 750KB

Availability: 99 left in stock

Allen-Bradley 1769-L24ER-QBFC1B CompactLogix 5370 L2 Controller Configured for integrated digital, analog, and high-speed motion execution in deterministic industrial networks, the...

SKU: 1769-L24ER-QBFC1B

Manufacturer: Allen Bradley
Product No.: 1769-L24ER-QBFC1B
Product Type: Programmable Logic Controllers
Product Origin: USA
Payment:T/T, Western Union
Weight: 900g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-L24ER-QBFC1B CompactLogix 5370 L2 Controller

Configured for integrated digital, analog, and high-speed motion execution in deterministic industrial networks, the Allen-Bradley 1769-L24ER-QBFC1B (1769-L24ER-QBFC1B Packaged Controller) provides direct physical/electrical execution. This hardware component integrates a 750 KB processing unit with an embedded high-density I/O matrix and dual EtherNet/IP communication interfaces on a single unified backplane architecture.

Hardware Specifications

Parameter	Specification
Model	1769-L24ER-QBFC1B
Brand	Allen-Bradley / Rockwell Automation
Origin	USA
Weight	0.90 kg (1.98 lbs)
Dimensions	140 mm width (5.51 in)
Operating Temp	0 to 60 deg C
Power Consumption	21 W maximum
User Memory	750 KB volatile RAM
Non-Volatile Storage	1 GB SD card included (1784-SD1), supports up to 2 GB (1784-SD2)
Embedded Digital Inputs	16 points, 24 VDC Sink/Source
Embedded Digital Outputs	16 points, 24 VDC Sourcing
Embedded Analog Inputs	4 universal channels (Voltage, Current, RTD, Thermocouple)
Embedded Analog Outputs	2 channels (Voltage, Current)
High-Speed Counters	4 integrated hardware counters
EtherNet/IP Node Support	Up to 8 nodes
CIP Motion Axes	Up to 4 axes (Positioning only)
Expansion Capacity	Up to 4 local 1769 Compact I/O modules
Communication Ports	2 x EtherNet/IP (DLR enabled), 1 x USB 2.0
Input Voltage	24 VDC nominal (19.2-31.2 VDC range)
Isolation Voltage	30 V continuous, tested at 500 VAC for 60 s

Deterministic Network and Processing Characteristics

The hardware incorporates dedicated backplane bus communication velocity architecture optimized for real-time EtherNet/IP deterministic networks. The embedded dual-port Ethernet interface executes high-speed data packets across Device Level Ring (DLR) topologies, ensuring physical media redundancy and network fault recovery times below 3 ms. Firmware flash compatibility via the integrated USB 2.0 port permits direct non-volatile memory updates, matching hardware execution logic with specified runtime revisions without disturbing the internal energy storage circuitry.

Frequently Asked Questions

Q: What is the maximum switching delay and recovery mechanism for the network interface during a physical link failure?

A: The embedded dual EtherNet/IP ports use Device Level Ring (DLR) hardware-layer processing. When configured in a DLR topology, the controller detects a ring fault and re-routes data packets within 3 ms, maintaining continuous I/O density scaling and processing execution without dropping local or remote connection nodes.

Q: Does the controller require an external battery for volatile memory backup during absolute power loss?

A: No, this hardware contains an internal, maintenance-free energy storage system. The system uses capacitors to write volatile data to the onboard non-volatile SD storage card immediately upon input voltage drop-out below 19.2 VDC, eliminating battery replacement maintenance schedules.

Q: Can the local 1769 expansion modules be hot-swapped while the controller is powered?

A: No, this hardware platform does not support Removal and Insertion Under Power (RIUP). Operators must isolate the 24 VDC nominal power source before adding or replacing any local 1769 Compact I/O modules on the right-hand side expansion bus to prevent physical component damage or data corruption.

Field Installation Guidelines

Engineers must mount the module horizontally on a standard DIN-rail or via direct panel mounting screws to optimize thermal heat dissipation profiles. Maintain a minimum clear spacing of 50 mm (2.0 in) on all sides of the unit to ensure adequate convective airflow through the ventilation slots within the 0 to 60 deg C operational threshold.

All digital and analog I/O wiring must use shielded, twisted-pair cables with the shield terminated exclusively at the designated chassis ground point to achieve proper signal cross-talk suppression. Route all low-voltage analog signal cables and high-speed counter connections in separate wire ducts isolated from high-voltage AC power distribution lines and variable frequency drive outputs to eliminate electromagnetic induction artifacts. Verify that the 24 VDC input power source complies with the specified 19.2 to 31.2 VDC tolerance band before energizing the device circuit.

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Maintenance Manager, USA

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