1747-L551 AB PLC CPU 16K Words Ethernet RS232

Parameters

• Product type: Modular PLC processor
• Program memory: 16K words
• Network channel: Ethernet
• Serial channel: RS-232
• Built-in Ethernet: 1 channel
• Mounting system: Compatible 1746 chassis
• Power arrangement: Powered through the chassis backplane
• Field I/O: Separate I/O modules required
• Local expansion limit: Up to 3 chassis and 30 I/O slots
• Memory retention: Battery-backed RAM; check battery condition
• Backup option: Compatible memory module; revision dependent
• Operating temperature: 0 to 60 C
• Programming: Compatible RSLogix 500 version

The AB 1747-L551 is a modular PLC processor with 16K words of program memory, an Ethernet network channel and a separate RS-232 channel. This 16K-word processor suits an installed system that uses an Ethernet connection alongside serial access. Record the IP configuration and the HMI communication path before replacement so the restored hardware can reconnect to the machine network. The processor works with a compatible 1746 chassis, power supply and selected I/O modules. For a replacement enquiry, provide clear label photographs, the hardware series, operating-system revision and a copy of the original project where available. Confirm whether the offer includes the battery, key and backup-memory module. The processor alone does not include the chassis, I/O assembly or application software.

Supply and Quotation

Request a quotation for AB 1747-L551 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 1747-L551, hardware series, operating-system revision, 1746 chassis and the original project. Verify Ethernet and RS-232 settings, I/O addressing and the power budget. A different memory or network version requires a project review before replacement.

FAQ

Q1. What memory rating should be used for 1747-L551?

The hardware manual specifies 16K words of program memory. Check project memory use in the programming software; do not relabel this as 16 MB.

Q2. Does 1747-L551 also provide RS-232?

Yes. It combines an Ethernet channel with an RS-232 channel. Confirm the existing IP address, serial protocol and programming connection.

Q3. Can every hardware revision use the same Ethernet features?

Do not assume identical capabilities across revisions. Match the hardware series and operating-system version to the network and project requirements.

Q4. How can I obtain a quote for 1747-L551?

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.