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1785-L40B
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Other Available Revisions for the 1785-L40B 1785-L40B//A1785-L40B//B1785-L40B//C1785-L40B//D1785-L40B//E
Common misspellings:
- l785-L40B
- 17b5-L40B
- 1785-140B
- 1785-LA0B
- 1785-L4oB
- 1785-L408
- 1785L40B
The 1785-L40B is a programmable controller from Allen Bradley from the PLC-5 series. The 1785-L40B connects to the local, extended and remote I/O modules on the communication interfaces. The controller has a 25-pin connector for communication and is an optically isolated EIA RS232C port. The front panel has an indicator light, which displays the communication status. When the channel is communicating, the indicator will show up green. There is a battery backup in the controller for the backup RAM. An EEPROM may be installed in the front panel slot for the program backup. The maximum number of I/O is 2048. The 1785-L40B is to be operated within an ambient temperature range of 0 to 60 degrees Celsius. The humidity of the environment should be non-condensing between 5 to 95%. The 1785-L40B controller module has a 48K maximum user word memory; it has a three-position-switch, which is used to select the controller mode. The controller has three modes, which include RUN mode, which is used to run the program, the second mode is the PROG mode which is used to upload and transfer the program to the controller. In the PROG mode, a user can modify and save the programs on the controller. The third mode is the REM mode, which is the remote mode; in this mode the outputs are enabled and the user can also save and edit the programs. The 1785-L40B is UL listed, CE certified, CSA certified and C-tick certified. The module must be installed by personnel trained on the system to prevent any damage to the equipment.
Technical Specifications for 1785-L40B
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | PLC 5 |
| Part Number | 1785-L40B |
| Product Type | PLC 5 controller |
| User Memory | 48K words |
| Maximum I/O | 2048 I/O |
| Backplane Current | 3.3 Amps |
| Power Dissipation | 17.3 Watts |
| Scan Time | 10 milliseconds |
| Temperature | 0-60 degrees Celsius |
| Standards | CE, UL |
| LEDs | Battery, communication, and force I/O status |
| Communication | RS-232 and RTS-423 |
About 1785-L40B
The 1785-L40B controller is a PLC 5 controller by Allen-Bradley. It is equipped with 4 DH+ and RIO controller ports. It comes with a maximum user memory capacity of 48K words. It has a total maximum I/O count of 2048 I/O. The controller is supplied with a backplane current load of 3.3 Amps. It has a maximum power dissipation of 17.3 Watts. The controller has a rated scan time of 10 milliseconds with a data rate of 57.6 KB per second, 7 milliseconds at 115.2 KB per second, and 3 milliseconds at 230.4 KB per second. The 1785-L40B controller has a small form factor with dimensions of 1.5 inches in length, 5.8 inches in width, and 10.5 inches in height. It can be easily installed in small and tight spaces. The temperature of the environment should not exceed 60 degrees Celsius. It is able to withstand moderate shocks and vibrations.
The Allen-Bradley PLC 5 1785-L40B controller is CE certified and UL listed. It has been designed to be operated in a Class 1 Division 2 industrial environment. The 1785-L40B module has a key switch on the front side that is used to switch between different operating modes. There are also LED indicators on the module to show the battery status, communication status, and Force I/O status. A D-Pin serial port is also present that takes in a D-connector. This port supports both the RS-232 and the RS-423 protocols. The 1785-L40B module supports different programming languages including ladder logic, subroutines, sequential function charts, and structured texts.
