Image is for illustrative purposes only. Please refer to product description.
- Manufacturer
- Allen-Bradley
- Manufacturer part number
- 1756-L71S
- Product family
- ControlLogix and GuardLogix Controllers (1756)
- Category
- PLCs and I/O › Safety PLCs and safety I/O
- Technical datasheet
- Data sheet
Specifications
| Attribute | Value |
|---|---|
| Type | GuardLogix safety controller |
| Manufacturer lifecycle | Active |
| Safety communication options | Standard and safety, EtherNet/IP, ControlNet, DeviceNet |
| Network connections per network module | 1000 I/O; 528 EtherNet/IP; 512 TCP (1756-EN4TR) 256 EtherNet/IP; 128 TCP (1756-EN2x) 128 EtherNet/IP; 64 TCP (1756-ENBT) 128 ControlNet (1756-CN2/B) 100 ControlNet (1756-CN2/A) 40 ControlNet (1756-CNB/D, 1756-CNB/E) |
| Programming languages | For the safety task, GuardLogix controllers support Ladder Diagram only., For standard tasks, GuardLogix controllers support: Not available Ladder Diagram (LD) Not available Structured Text (ST) Not available Function Block Diagram (FBD) Not available Sequential Function Chart (SFC) |
| User memory | 2 MB |
| Safety memory | 1 MB |
| I/O memory | 0.98 MB |
| Nonvolatile memory storage | 1 GB Secure Digital (SD) card (1784-SD1), ships pre-installed in the controller |
| Digital I/O, max | 128,000 |
| Analog I/O, max | 4000 |
| Total I/O, max | 128,000 |
| Energy storage modules | 1756-ESMCAP capacitor energy storage module (removable, ships installed with every controller) 1756-ESMNSE capacitor energy storage module (removable, no residual, WallClockTime power backup) 1756-ESMNRM capacitor energy storage module (non-removable, helps prevent USB connection and SD card use to help secure the controller) |
| Current draw @ 1.2V DC | 5 mA |
| Current draw @ 5.1V DC | 800 mA |
Show all 37 specificationsShow fewer specifications
| Power dissipation | 2.5 W |
|---|---|
| Thermal dissipation | 8.5 BTU/hr |
| Isolation voltage | 30V (continuous), basic insulation, USB port-to-system, Compliant and tested according to IEC/UL 61010-1 |
| Weight, approx | 0.25 kg (0.55 lb) |
| Slot width | 2 (both modules needed; each is one slot) |
| Module location | Chassis-based, any slot |
| Chassis | 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K, 1756-A17, 1756-A17K |
| Power supply, standard | 1756-PA50, 1756-PA50K, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB50K 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PC75, 1756-PH75 |
| Power supply, redundant | 1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K |
| Wire category | 3 - on USB ports |
| Temperature code | T4 |
| Enclosure type rating | None (open-style) |
| Temperature, operating | 0 °C ≤ Ta ≤ +60 °C (+32 °F ≤ Ta ≤ +140 °F) |
| Temperature, nonoperating | -40…+85 °C (-40…+185 °F) |
| Relative humidity | 5…95% noncondensing |
| Vibration | IEC 60068-2-6 (Test Fc, Operating) |
| Shock, operating | IEC 60068-2-27 (Test Ea, Unpackaged Shock) |
| Shock, nonoperating | IEC 60068-2-27 (Test Ea, Unpackaged Shock) |
| Emissions | IEC 61000-6-4 |
| ESD immunity | IEC 61000-4-2 |
| Radiated RF immunity | IEC 61000-4-3 |
| Conducted RF Immunity | IEC 61000-4-6 (Not applicable: USB is a temporary programming port.) |
Description
The Allen-Bradley 1756-L71S is the Logix 5571S Automation Controller 2/1M, a chassis-based controller that Rockwell Automation lists with an Active Mature lifecycle status. According to Rockwell technical data 1756-TD001, it has 2 MB of user memory, 1 MB of safety memory and 0.98 MB of I/O memory, with a maximum of 128,000 total I/O. It draws 800 mA at 5.1 V DC, dissipates 2.5 W and weighs approximately 0.25 kg. Rockwell states a slot width of 2, with both modules needed and each taking one slot.
Application: PLC controller
Used with: ControlLogix 1756 chassis
What is the 1756-L71S used for?
The 1756-L71S runs the control program in a 1756 chassis and can be fitted in any slot. Rockwell lists standard and safety communication options over EtherNet/IP, ControlNet and DeviceNet. Standard tasks can use Ladder Diagram, Structured Text, Function Block Diagram and Sequential Function Chart, while the safety task supports Ladder Diagram only.
Key features
- 2 MB user memory and 1 MB safety memory
- Supports up to 128,000 total I/O
- 1 GB SD card ships pre-installed
- Safety task programmed in Ladder Diagram only
- Standard and safety options on EtherNet/IP, ControlNet, DeviceNet
Documents and Resources
Associated Products
| Image | Product | Description | Stock | View | Add to RFQ |
|---|---|---|---|---|---|
 | 1756-L72SAllen-Bradley | GuardLogix 5572S controller, 4 MB user memory | In stock | View | |
 | 1756-L73SAllen-Bradley | Logix 5573S safety controller, 8 MB user memory | In stock | View | |
 | 1756-L81ESXTAllen-Bradley | GuardLogix 5580 XT Controller with Conformal Coating | In stock | View | |
 | 1756-L82ESXTAllen-Bradley | GuardLogix 5580 XT Controller with Safety Task | In stock | View | |
 | 1756-L83ESXTAllen-Bradley | GuardLogix 5580 XT Controller Module | In stock | View | |
 | 1756-L73SXTAllen-Bradley | Logix 5573SXT Automation Controller 8/4M | In stock | View | |
 | 1756-L81ESAllen-Bradley | GuardLogix 5580 Safety Controller 3 MB Memory | In stock | View | |
 | 1756-L81ESKAllen-Bradley | GuardLogix 5580 Safety Controller, Conformal Coated | In stock | View | |
 | 1756-L81EXTSAllen-Bradley | Guardlogix 5580 XT Controller, Chassis-Based Module | In stock | View | |
 | 1756-L82ESAllen-Bradley | GuardLogix 5580 Safety Controller, 5MB Memory | In stock | View | |
 | 1756-L82EXTSAllen-Bradley | GuardLogix 5580 XT Controller Module | In stock | View | |
 | 1756-L83ESAllen-Bradley | Guardlogix 5580 Controller with 5 MB Safety Memory | In stock | View |
Product Questions
Is the 1756-L71S discontinued?
No. Its manufacturer lifecycle status is Active.
Can another Allen-Bradley ControlLogix and GuardLogix Controllers part replace it?
Potential replacements must be checked against the required ratings, dimensions and connections. Sharing a family name does not establish interchangeability.
Do you ship worldwide?
Yes. TimControls ships worldwide. Parts usually ship within 3 to 7 working days of order confirmation, and the exact lead time and shipping options are stated on your quote. Include your delivery country and postal code when you ask for a quote.
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