Product Overview
The Allen-Bradley 1785-L80E controller is a programmable logic controller or PLC from the Allen-Bradley/Rockwell Automation PLC-5 series. It is well-suited for large-scale industrial applications and it works with an external power source. The power supply modules that are compatible with the 1785-L80E PLC include the Allen-Bradley 1771-P4S power supply, the 1771-P6S power supply, the 1771-P4S1 power supply, and the 1771-P6S1 power supply module. The 1785-L80E PLC can communicate through its Ethernet interface port, its DH+ and Remote I/O ports that can be adapter ports or scanner ports, and through its serial port that can handle RS 232, RS 423, and RS 422A communication. Additionally, this PLC supports up to 2048 analog I/O points, and either 3072 maximum total I/O points in any mix or a complementary setup of 3072 inputs and 3072 outputs.
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Technical Specifications
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Series | PLC 5 |
| Part Number | 1785-L80E |
| Product Type | PLC |
| Ethernet | Supported |
| DH+ | Supported |
| Remote I/O | Supported |
| Software | RSLogix 5 Software |
| Operating Temperature | 32 to 140 degrees Fahrenheit |
| Storage Temperature | -40 to 185 degrees Fahrenheit |
Description

The Allen-Bradley 1785-L80E is a legacy Programmable Logic Controller (PLC) by Allen-Bradley. This PLC is ideally is used for Large applications with complex control requirements. It is capable of implementing discrete and analog control in both manual and automatic modes, implement motion, calculation, counting and deployment of advanced control algorithms such as Proportional + Integral + Derivative (PID) control.
This controller has a non-expandable user memory amounting to 100KWords used for storing user programs, and configuration. The contents of the user memory is maintained by a Lithium battery with catalog number 1785-XYC. Non-volatile memory backup devices may be installed to the controller to complement the internal user memory. Compatible memory devices for this controller are 1785-ME16 for 16K words, 1785-ME32 for s 32K words, 1785-ME64 for 64K words and 1785-ME100 for 100K words.
The 1785-L80E has embedded communication ports that allow the controller to communicate with different industrial devices and implement distributed I/O applications. This communication ports include a 25-Pin RS232 communication port used for point-to-point communication. It supports DF1 Full and Half duplex protocols. It also has an 8-Pin mini-DIN programming terminal, Channels 1A and 1B combo ports that are configurable for Data Highway Plus (DH+) and Remote I/O (RIO) Adapter or Scanner. It also has an Ethernet communication port that supports 10/100 Mbps with auto-negotiation capability. These communication interface functions independently and may operate simultaneously. can be operated independently and simultaneously.
This controller supports installation of a total of 93 I/O chassis with a maximum of 32 Remote I/O chassis per link, capable of controlling I/Os up to 3072 any mix or3072 in + 3072 out (complement).
Frequently Asked Questions (FAQs)
What type of memory does this unit have?
The 1785-L80E has a 48K Word memory.
Does this controller support Gigabit transmission speed?
No, it only support 10/100 Mbps communication rate.
Does this controller require a battery to operate?
This controller is shipped with a Lithium battery with catalog number 1785-XYC. It is not required to operate however, it performs a very important function of maintaining the controller memory when the devices is without power.
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