1747-L543 AB PLC CPU 64K Words DH Plus RS232

Parameters

• Product type: Modular PLC processor
• Program memory: 64K words
• Network channel: DH+
• Serial channel: RS-232
• Built-in Ethernet: None
• 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-L543 is a modular PLC processor with 64K words of program memory, a DH+ network channel and a separate RS-232 channel. This 64K-word configuration is intended for an appropriately matched DH+ control system. A buyer replacing it should verify the actual program size before accepting a lower-memory alternative, even when the front-panel appearance is similar. 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-L543 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-L543, hardware series, operating-system revision, 1746 chassis and the original project. Verify DH+ 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-L543?

The hardware manual specifies 64K words of program memory. Check project memory use in the programming software; do not relabel this as 64 MB.

Q2. Can 1747-L543 be replaced by a 32K-word unit without review?

No. The smaller unit may not hold the existing project. Review memory use, instructions, firmware and communications before considering another catalog number.

Q3. Does the 64K rating identify built-in I/O points?

No. It is the program-memory rating in words. Field inputs and outputs are provided by separately selected modules and system hardware.

Q4. How can I obtain a quote for 1747-L543?

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.