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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 |
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Max I/O Chassis Extended Local |
0 |
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Max I/O Chassis Universal Remote |
32 Max. Per I/O Link |
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RS-232-C/422-A/423- A Ports |
1 |
|
Control Coprocessor Expansion Port |
Yes |
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Overview
The 1785-L80B is an Allen-Bradley enhanced PLC5 Programmable Logic Controller (PLC). This controller has an embedded user memory of 100,000 Words and comes with multiple communication interfaces such as four (4) DH+/Remote I/O (Adapter or Scanner), one (1) serial port configurable for RS-232, -423, and RS-422A compatibility, and two (2) programming terminals. It can accommodate up to 3072 any mix or 3072 input and 3072 output in complimentary mode.
Technical specifications for 1785-L80B
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Manufacturer |
Allen Bradley |
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Category |
PLCs |
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Product Line |
PLC 5 |
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Part Number |
1785-L80B |
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UPC |
612598137213 |
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Weight |
3.00 lbs (1.36 kg) |
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Max I/O Chassis Total |
93 |
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Max Total I/O |
3072; any mix or 3072 in + 3072 out |
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Module Type |
PLC5 Processor |
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Communication Ports |
Four (4) DH+/Remote I/O (Adapter or Scanner), One (1) serial port configurable for RS-232 and 423 and RS-422A compatible and Two (2) programming terminals. |
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Supported Protocols |
DF1, ASCII, Data Highway Plus (DH+), Remote I/O (RIO) |
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Controller Memory |
up to 64KWords |
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Controller Memory expansion |
1785-ME16 with 16K Words, 1785-ME32 with 32KWords, 1785-ME64 with 64KWords |
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Max. number of I/O racks |
32 |
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Battery |
1770-XYC |
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Controller Redundancy |
Supported |
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Power Dissipation |
12 W |
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Backplane Current draw |
2.3 A |
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Processor |
PLC-5/80 |
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Max User Memory Words |
100 Kilowords |
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Battery-Backed Static RAM |
Yes |
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EEPROM Program Backup Option (using 1785-ME16, -ME32, -ME64, and -M100) |
Yes |
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Protected Memory |
No |
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Max Analog I/O |
3072 |
Features
|
High I/O Capacity |
Supports up to 3072 I/O points for large automation systems |
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Large Memory |
Integrated 100,000-word user memory for complex control programs |
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Multiple Communication Channels |
Includes four DH+/Remote I/O communication channels |
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Flexible Communication Modes |
Channels can operate as Remote I/O scanner, adapter, or DH+ interface |
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Serial Communication Port |
One optically isolated RS-232C serial port supporting DF1 and ASCII protocols |
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Extensive Networking |
Supports communication with up to 93 I/O chassis and 32 Remote I/O racks |
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DH+ Networking |
Enables peer-to-peer PLC communication and remote programming |
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Front Panel Diagnostics |
Multiple LED indicators for battery, processor, communication, force status, and channel activity |
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High-Speed Communication |
DH+ communication speeds up to 230.4 kbps |
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Wide Chassis Compatibility |
Compatible with multiple 1771 PLC-5 chassis configurations |
Applications
The 1785-L80B PLC controller is commonly used in:
l Process automation systems
l Oil and gas facilities
l Power generation plants
l Water and wastewater treatment
l Manufacturing production lines
l Material handling systems
l Heavy industrial machinery
l Distributed control systems requiring extensive Remote I/O communication
FQA
Q: What is the function of the 1785-L80B controller?
A: The 1785-L80B functions as the main processor in a PLC-5 automation system, controlling I/O operations and managing communication between industrial devices.
Q: How many communication ports are available on the 1785-L80B?
A: The controller includes four DH+/Remote I/O communication channels and one serial communication port.
Q: Which communication protocols does the serial port support?
A: Channel 0 supports DF1 Full-Duplex, DF1 Half-Duplex, DF1 Half-Duplex Slave, and ASCII communication protocols.
Q: What is the maximum I/O capacity of the 1785-L80B?
A: The 1785-L80B supports up to 3072 total I/O points in industrial automation applications.
Q: Which chassis are compatible with the 1785-L80B?
A: The controller can be installed in 1771-A1B, 1771-A2B, 1771-A3B, 1771-A3B1, and 1771-A4B PLC-5 chassis.
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