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The 1785-LT3 processor module is a PLC 5 series classic processor module that has been manufactured by Allen-Bradley. Its maximum user memory capacity is 6K words. The 1785-LT3 processor module also supports an EEPROM module with a maximum capacity of 8K words. It can handle up to 256 analog I/O at a time. The 1785-LT3 processor module has a typical program scan time per 1000 words of 8 milliseconds.
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| Manufacturer | Allen Bradley |
|---|---|
| Category | PLCs |
| Product Line | PLC 5 |
| Part Number | 1785-LT3 |
| Weight | 3.19 lbs (1.45 kg) |
| Module Type | Processor |
| Max Total I/O | 512 |
| Analog I/O | 256 |
| DH+ Channel | Yes |
| Remote I/O Channel | Yes |
| Number of Words | 6 Kilowords SRAM |
| Backplane Requirement | 2.5 Amperes at 5 Volts DC |
| Max Analog I/O | 3072 |
| I/O Scan Time Per Rack | 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, 3 ms at 230.4 mbits/s |
| Max I/O Chassis Total | 93 |
| Max I/O Chassis Extended Local | 0 |
| Max I/O Chassis Universal Remote | 32 Max. Per I/O Link |
| RS-232-C/422-A/423- A Ports | 1 |
| Control Coprocessor Expansion Port | Yes |
The Allen-Bradley 1785-LT3 has 512 I/O. This module comes with a DH+ Channel and a Remote I/O Channel (Adapter Only). The DH+ connection supports remote programming and information access. DH+ links can be used for data transfer to higher level computers and as PLC-5 programming processors. This module can communicate via DH+ links with other processors and with the programming terminal. this module can also connect a maximum of 64 stations to the DH+ link. The operating temperature of the 1785-LT3 module is 0-60 °C (32-140 °F). The nonoperating temperature of this module is -40-85 °C (-40-185 °F). If you keep this module in an area that has a temperature above or below those temperatures, it will cause damage to the module. The 1785-LT3 module has a memory of 6K words. The backplane current of this module is 2.5 A at 5V DC. This module has a Control Coprocessor Expansion Port. This module offers a control strategy. This module has hardware selection, layout, and addressing features. The remote I/O transmission rates of this module are 57.6 kbps. The 1785-LT3 comes with a sequential function chart (SFC) and special programming features. In using this module, you can also develop your program, enter your program, and test it. When testing is complete, you can apply the program in your app. Detailed analysis can be used as a basis for developing your test procedures and requirements. Because the functional specifications of this module are advanced, the 1785-LT3 can be used as a document sign-off program.
| Revision Part # | Also known as | |
|---|---|---|
| 1785-LT3 Ser A | 1785-LT3/A, Series A, Rev A | |
| Don't see your particular revision? Contact us now. | ||
Allen Bradley PLC 5 Processor, 512 Max Total I/O, 256 Analog I/O, DH+ Channel, Remote I/O Channel, 6 Kilowords SRAM