The 1756-L85EXT Controller is a ControlLogix-XT controller and it is a product of Allen Bradley from the ControlLogix-XT 5580 product line. It has 40 MB of user memory, 128,000 maximum digital input and output points, and 4000 maximum analog input and output points. The total input and an output point count is 128,000 I/O at maximum. It has an optional nonvolatile memory capacity of 2 GB, and this memory device is shipped pre-installed in the controller. The 1756-L85EXT ControlLogix-XT Controller has current draws of 5 milliamps and 1.2 Amps at 1.2 Volts DC and 5.1 Volts DC, respectively. It has a power dissipation rating of 6.2 Watts, and 21.2 BTU per hour of rated thermal dissipation. This Allen Bradley controller has an approximate weight of 0.394 kilograms, and an isolation voltage of 50 Volts. It features an open-style enclosure type and it operates in a temperature range of -25 to 70 degrees Celsius. The non-operating temperature range of this unit ranges from -40 to 85 degrees Celsius.
The Allen Bradley 1756-L85EXT ControlLogix-XT Controller operates at full power at a maximum environmental temperature of 70 degrees Celsius. It has a non-condensing tolerable relative humidity range of 5 to 95 percent, with an operating vibration rating of 2 g at 10 to 500 Hertz. The other specifications of this unit include 30 g of maximum tolerable operating and non-operating shock. The ControlLogix-XT controllers work the same as the conventional ControlLogix series controllers. Also, these devices come with communication system components and control functions that provide a layer of protection against exposure to corrosive and harsh surroundings. The 1756-L85EXT Controller can tolerate a temperature range of -20 to 70 degrees Celsius when it is used with the FLEX input/output-XT products and it can tolerate a temperature range of -25 to 70 degrees Celsius when it is used alone.
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| Brand | Allen Bradley / Rockwell Automation |
| Series | ControlLogix |
| Part Number | 1756-L85EXT |
| Product Type | Controller |
| User Memory | 40 MB |
| Nonvolatile Memory (Optional) | 2 GB |
| Minimum Current Draw | 5 mA at 1.2V DC |
| Maximum Current Draw | 1.2 A at 5.1V DC |
| Thermal Dissipation | 21.2 BTU/hour |
| Power Dissipation | 6.2 W |
| Isolation Voltage | 50 V (Continuous) |