The Allen-Bradley 1756-L61 is a robust ControlLogix controller known for its significant processing capabilities, featuring 2 MB of user memory and 478 KB of I/O memory, with optional non-volatile storage of 128 MB via a 1784-CF128 CompactFlash card. Designed to fit seamlessly in a 1756 chassis, this controller supports a maximum of 250 connections and accommodates up to 128,000 digital and 4,000 analog I/O points. Equipped with a versatile RS-232 serial communication port, it supports multiple protocols like DF1, Modbus, and DH-485, making it ideal for complex, distributed I/O applications, and it is capable of redundancy integration for enhanced system reliability.
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Technical specifications for 1756-L61
| Manufacturer | Rockwell Automation |
|---|---|
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1756-L61 |
| Series | ControlLogix |
| Module Type | Processor Module |
| Fixed Memory | 2, 4, or 8 MB |
| Nonvolatile Memory | Compact Flash Card 1784-CF128 |
| Maximum I-O | 128,000 |
| Communication | RS-232 serial port |
| RS232 Protocols | ASCII DF1 full/half-duplex DF1 radio modem DH-485 Modbus via logic |
| Maximum Analog I-O | 4,000 |
| Program Scan Time | 0.08 milliseconds |
| User Memory | 2MB |
| Backplane Current (5Volts DC) | 1.2 Amps |
| Backplane Current (24 Volts DC) | 14 milliamps |
| Weight | 0.71 pounds (0.32 kilograms) |
| Vibration | 10-500 Hertz |
| UPC | 10612598300706 |
| Relative Humidity | 5-95 percent |
| Battery | 1756-BA1, 1756-BATM or 1756-BATA |
| UNSPSC | 32151705 |
| Product Lifecycle Status* | Discontinued/Obsolete |
| Full Support | Programming Languages |
* The Allen Bradley 1756-L61 has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1756-L61 units instead of migration.