1756-L74 AB PLC CPU 16 MB Memory USB Chassis Mount

Parameters

• Product type: Standard modular PLC controller
• User memory: 16 MB for data and logic
• I/O memory: 0.98 MB
• Built-in interface: 1 USB programming port
• Built-in Ethernet: None; use a compatible chassis network module
• Mounting system: 1756 chassis
• Power arrangement: Chassis backplane power
• Field I/O: Separate I/O modules required
• Nonvolatile storage: Supported SD card; inclusion to be confirmed
• Memory retention: Compatible energy storage module
• USB purpose: Temporary local programming and configuration
• Programming: Compatible Logix software and firmware
• Supply scope: Controller and confirmed accessories

The AB 1756-L74 provides 16 MB of memory for control logic and data in a modular 1756 chassis installation. The 16 MB data-and-logic memory is useful when matching a project that exceeds the capacity of smaller controller targets. A USB port supports local engineering access, while plant-network communication is handled through compatible chassis modules. The controller uses supported SD storage and an energy storage module, so these items should be identified in the quotation. When requesting a spare, provide the original project version, firmware major revision and chassis module list. Confirm the exact catalog number and supplied accessories before shipment, then restore and verify the approved machine project during commissioning.

Supply and Quotation

Request a quotation for AB 1756-L74 with quantity, destination and preferred condition. Send label photos and required series or firmware details. We will confirm availability, included items, inspection scope, delivery terms and warranty for the specific offer. Software licenses, machine programs and optional hardware require separate confirmation.

Compatibility

Match 1756-L74, firmware, engineering software, project target, chassis and communication modules. Confirm the SD card and energy storage module. USB is for temporary local engineering access; it is not a permanent field-network connection.

FAQ

Q1. How much memory does 1756-L74 provide?

It has 16 MB for application data and logic plus 0.98 MB of I/O memory. Confirm that the project fits the selected controller target.

Q2. Is Ethernet built into this CPU?

No. The controller has a USB programming port. Ethernet communication requires a compatible chassis network module.

Q3. Can a lower-memory CPU replace 1756-L74 directly?

Only after an engineering review. Confirm project size, supported instructions, firmware and connected modules before choosing a different controller.

Q4. How can I obtain a quote for 1756-L74?

Send the complete model, quantity, destination and preferred condition. Include label photos, hardware series and firmware requirements. Price and availability are confirmed for the offered unit.

Q5. Does the controller arrive with my machine program?

Hardware supply does not automatically include machine files, passwords or engineering software. Confirm access to the original project and the compatible software before replacement.

Q6. What inspection details and accessories can be confirmed?

Request label and connector photos, revision identification and an agreed power-up or communication check where applicable. Confirm every included accessory, packing, dispatch timing and warranty in the offer.