Product Overview
The 1785-L26B is a standard PLC-5 processor from Allen-Bradley. It includes 16K of battery-backed SRAM. This processor supports up to 512 analog I/O points. It also handles 512 total I/O in any mix. The controller works with 1771, 1794, and 1746 I/O modules. It offers a DH+ port and a remote I/O port. The processor uses a 25-pin D-shell serial port. This device measures ambient temperature from 0 to 60°C. It weighs 1.42 kg and has an open-style enclosure. The product holds UL, CE, CSA, and C-TICK certifications.
Application Scenarios
This processor excels in factory automation systems. It controls conveyors, packaging lines, and machine tools. The processor manages discrete and analog field devices. It works best in mid-sized control applications. The PLC supports remote I/O chassis up to 12 units. It can connect to DH+ networks for data sharing. The controller also supports relay cartridge interfaces.
Technical Specifications
The processor uses 16 kilowords of user memory. It has battery-backed static RAM for data retention. The maximum total I/O is 512 points. This includes 512 analog I/O options. The scan time per rack is 3 ms at 230.4 kbits/s. The controller supports 13 I/O chassis total. It includes one RS-232/422/423 port. The backplane current draw is 2.6 A at 5 V DC. Voltage isolation is tested at 500 V for 1 minute. The operating humidity range is 5-95% non-condensing. The device withstands 30G shock and 1G vibration.
Installation & Maintenance Guide
Install the 1785-L26B in the left-most slot of a 1771 chassis. Use the correct addressing mode: 2-slot, 1-slot, or half-slot. Connect the DH+ port to a DH+ network. Use the serial port for programming with RS-232. Ensure the battery is installed for memory backup. Replace the battery every five years. Clean the module with a dry cloth. Do not expose the unit to condensation. Use only approved power supplies from Allen-Bradley. For shipping, use original packaging. We ship via FedEx, UPS, or DHL.
Packing List
One Allen-Bradley 1785-L26B PLC-5/26 processor. No cables or accessories are included. The unit comes in an anti-static bag. A user manual is available online.
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