The 1756-L1 is a versatile processor module within the ControlLogix platform. This Logix5550 controller delivers 64 KB of user memory for logic and data storage. It supports up to 250 connections for extensive networking capabilities. The module weighs just 0.28 kilograms, making it lightweight and easy to handle. This processor handles 128,000 discrete I/O points and 4,000 analog I/O points. Consequently, it suits a wide range of medium-scale control tasks effectively.
This processor draws a backplane current of 120 mA at 5V DC. Meanwhile, it consumes only 2 mA at 24V DC. The maximum power dissipation reaches 4.1 W at 60 °C. Its average thermal dissipation is rated at 11.3 BTU/hour. The isolation voltage is 30V continuous with basic insulation. The 1756-L1 includes an integrated RS232 communication port. For programming, you need either the 1756-CP3 or 1747-CP3 serial cable. The module uses a replaceable lithium battery. Specifically, it is compatible with the 1756-BA1 or 1756-BA2 battery types.
The 1756-L1 does not include built-in nonvolatile memory. However, you can add external memory modules for program storage. Compatible options include the 1756-M1, 1756-M2, and 1756-M3 memory modules. Using any other memory module may cause system failure. The onboard battery maintains the RAM content during power outages. Therefore, regular battery checks are recommended for reliable operation.
This controller supports a broad range of communication networks. For instance, it works with DeviceNet, ControlNet, and DH+ networks. Additionally, it communicates via EtherNet/IP and RS-232-C using DF1 or DH-485 protocols. The integrated RS232 port connects to programming devices seamlessly. Furthermore, it interfaces with HMIs, SCADA systems, and other visualization platforms. The 1756-L1 also supports distributed I/O configurations. Specifically, it works with ControlLogix I/O, Flex I/O, and POINT I/O modules. Communication setup is defined through RSLinx Classic or Enterprise edition software.
The operating temperature ranges from 0 °C to 60 °C. In contrast, the storage temperature spans -40 °C to 85 °C. The relative humidity must stay between 5% and 95%, non-condensing. This module withstands vibration of 2G at 10 to 500 Hz. Moreover, it handles an operating shock of 30G peak for 11 milliseconds. The non-operating shock rating is 50G peak for 11 milliseconds. The 1756-L1 is an open-style module. As such, it does not carry a specific enclosure type rating.
First, insert the module into any available slot in the 1756 chassis. You can install multiple controllers in the same chassis. These controllers communicate across the backplane while operating independently. The 1756-L1 occupies just one slot in the chassis. Power is supplied through the backplane from a ControlLogix power supply. Compatible chassis include the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17. Always follow standard ESD precautions during handling and installation.
This controller supports IEC 61131-3 programming languages. For example, it works with Ladder Logic, Function Block Diagram, and Sequential Function Chart. Additionally, it supports Statement List programming. The front panel features diagnostic LED indicators. These lights report the module's operating status clearly. Consequently, troubleshooting becomes faster and more efficient.
One Allen-Bradley 1756-L1 Logix5550 Processor module
Factory-installed battery (1756-BA1 type)
Product information leaflet
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1. What is the maximum I/O capacity of the 1756-L1?
The 1756-L1 supports up to 128,000 discrete I/O points. For analog signals, it accommodates 4,000 inputs and outputs.
2. Which memory modules are compatible with this processor?
You can use the 1756-M1, 1756-M2, or 1756-M3 memory modules. Do not use any other memory types, as this may damage the module.
3. What battery types work with the 1756-L1?
This processor is compatible with the 1756-BA1 and 1756-BA2 lithium batteries. Always use only these specified types.
4. Can multiple 1756-L1 controllers be installed in one chassis?
Yes, you can install multiple controllers in the same chassis. They communicate across the backplane but operate independently.
5. Does the 1756-L1 have built-in nonvolatile memory?
No, the 1756-L1 does not include nonvolatile memory. You must add an external memory module or rely on the battery-backed RAM to retain programs during power loss.
| Brand Name | |
| Model No. | 1756-L1 |
| Product Type | Processor Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
