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1785-L40E
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Product Description
The PLC 5 1785-L40E controller is an Ethernet/IP controller by Allen-Bradley. It has a 48K-word SRAM.
Other Available Revisions for the 1785-L40E 1785-L40E//A1785-L40E//B1785-L40E//C1785-L40E//D1785-L40E//E
Common misspellings:
- l785-L40E
- 17b5-L40E
- 1785-140E
- 1785-LA0E
- 1785-L4oE
- 1785L40E
The 1785-L40E is an Ethernet PLC-5 Programmable Controller manufactured by Allen-Bradley that belongs to the 1785 series. The 1785-L40E features the 1785-ME64, 1785-ME16, 1785-M100, or the 1785-ME32 backup memory modules for the Allen-Bradley lithium battery. It uses backplane current of 3.6 Amps at 5 Volts DC, and the maximum operational thermal dissipation that this controller can have is 65.00 BTU/hour. The 1785-L40E has an internal circuit clock with an accuracy variation of ± 5 minutes per month, and it can function properly in a temperature of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) around a humidity range of 5 to 95% for non-condescending humidity. The controller can withstand an operational shock of 30G with a vibration of 1G in the range of 10 to 500 Hertz. The average weight of the 1785-L40E controller is 1.38 kilograms (3.0 pounds). This controller also features an open enclosure. For communication purposes, this controller uses an Ethernet interface and interconnect cable.
While setting up the 1785-L40E controller, there are a few things that need to be kept in mind. The shipment of the processor of the controller is done in a static-shielded container to guard against any possible electrostatic discharge (ESD) damage. While setting the configuration plugs or switches, ESD can cause damage inside the module. A few things can be done to avoid ESD, such as wearing a properly grounded wrist strap, keep in touch with an approved ground point while installing, and avoiding touching the backplane connector or connector pins. The module should be kept in its static-shielded container when no one is using it. It is not recommended to change the Ethernet configuration jumper default setting, which is set at 802.3. This is the standard configuration. The Allen-Bradley Ethernet PLC-5 controllers, especially the 1785-L40E, provide users with an opportunity to gather the information needed to make informed business decisions, and achieve better performance for and more memory. With better speed features available, this series is one of the best controller series available in the market.
Technical Specifications for 1785-L40E
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | PLC 5 |
| Part Number | 1785-L40E |
| Product Type | Ethernet/IP controller |
| Memory | 48K words of SRAM |
| Mounting | DIN Rail |
| Communication Speed | 10/100 Mbps |
| Current | 3.6 Amps |
| Voltage | 5 Volts DC |
| Thermal Dissipation | 65 BTU/hr |
| Power Dissipation | 17.3 Watts |
| Temperature | 0-60 degrees Celsius |
| Enclosure | Open |
About 1785-L40E
The 1785-L40E controller is an Allen-Bradley manufactured Ethernet/IP controller. It comes with 48K words of SRAM capacity. This PLC 5 Series E controller is compact in size and it offers different features. It can be easily mounted by using a DIN rail. A keyswith is present on the front that is used to select different operating modes. There are LED indicators next to the keyswitch that show the battery status, controller Run/Fault status, Force I/O status, and the communication status. The 1785-L40E controller also has an Ethernet status indicator and an Ethernet transmit indicator that show whether the communication is being done at 100 Mbps or 10 Mbps. An Ethernet port (the RJ 45) is present next to the D-shell serial port connector. The D-connector supports standard RS 423 and RS 232 communication. This serial port supports full-duplex and half-duplex protocols. The bottom part of the controller has the 8-Pin DH+ terminal that is used for making connections parallel to Channel 1A.
The 1785-L40E controller supports additional memory modules. A write label is present with a memory module that can be used to write information about the channel and station address. The RAM of the controller has a backup battery that helps to save data in conditions like power losses. The battery also powers the system real-time clock. The controller is powered with 3.6 Amps of current from the backplane with 5 Volts DC backplane voltage. Under normal operating conditions, the 1785-L40E controller has a thermal dissipation rating of 65 BTU per hour and a power dissipation rating of 17.3 Watts. The installation environment’s ambient temperature range should be set between 0 and 60 degrees Celsius with a maximum of 95% non-condensing relative humidity.
The PLC 5 1785-L40E controller is an Ethernet/IP controller by Allen-Bradley. It has a 48K-word SRAM.
