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Allen Bradley ControlLogix 1756-L61S

Product image is representative; revision or series may vary. Contact us to request a specific version.

1756-L61S

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The Allen-Bradley 1756-L61S processor is part of the ControlLogix and GuardLogix series. This processor comes with 2 MB of standard memory and with 1 MB of safety memory. The 1756-L61S ControlLogix and GuardLogix processor can be used as part of an Allen-Bradley 1756 control system or an Allen-Bradley 1768 control system. It supports DeviceNet, ControlNet, and EtherNet/IP communication. The 1756-L61S ControlLogix and GuardLogix processor does not support controller redundancy and it does not have an enclosure, but it has an I/O memory capacity of 478 KB.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1756-L61S

ManufacturerAllen Bradley
CategoryPLCs
Product LineControlLogix
Part Number1756-L61S
UPC612598321742
Weight0.75 lbs (0.34 kg)
Module TypeGuardLogix Controller
I-O Memory478 KB
User Memory2 MB
Maximum I-O128,000
Maximum Analog I-O4,000
Maximum Digital I-O128,000
Current Draw (5.1 Volts DC)1200 Miliamperes
Current Draw (24 Volts DC)14 Miliamperes
Power Dissipation3.5 Watts
Thermal Dissipation11.9 BTU per hour
Isolation Voltage30 Volts Continuous
EnclosureNone (Open-Style)
UNSPSC32151705
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1756-L61S has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1756-L61S units instead of migration.

The Allen-Bradley 1756-L61S ControlLogix controller module offers a scalable controller key that can handle many I/O points. You can set the ControlLogix controller into several slots of the ControlLogix I/O chassis and install numerous controllers in similar chassis. ControlLogix controllers are also capable of monitoring and controlling I/O across the ControlLogix backplane and above the network links. The ControlLogix 1756-L61S controllers have a rooted Ethernet port for direct connectivity to Ethernet-equipped devices as well as networks and they support communication interface modules in the local chassis. To provide communication for ControlLogix 1756-L61S controllers, you need to install the suitable communication interface module in the local chassis. The ControlLogix 1756-L61S controller comes with a conformal coating. A conformal coating is nothing other than a fine coating with polymer sheets that provide a fine secured layer of protection against contaminants and pollutants as well as humidity and this will lead to the congregation and extension of the product life in harsh and corrosive environments. The device features an I/O memory of 478 KB and a maximum user memory of 2 MB. The current drawing capacity of this device at 5.1V DC is around 1200 milliamperes and at 24V DC, it is around 14 milliamperes. The power dissipation rate of the model is 3.5 Watts, with a thermal dissipation of 11.9BTU per hour. It has a 30V continuous isolation voltage and the enclosure in this model is open-style.

Revision Part #Also known as
1756-L61S Ser A1756-L61S/A, Series A, Rev A
1756-L61S Ser B1756-L61S/B, Series B, Rev B
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