The Allen‑Bradley 1756‑L72S is a GuardLogix® 5572S safety controller from Rockwell Automation's ControlLogix® 5570 family. It is an integrated safety PAC (Programmable Automation Controller) that executes both standard control and safety control on a single hardware platform, eliminating the need for a separate safety PLC.
Item No :
1756-L72SOrder(MOQ) :
1Payment :
EXWProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3KG| Specification | Description |
|---|---|
| Manufacturer | Rockwell Automation (Allen‑Bradley) |
| Model | 1756-L72S |
| Product Family | ControlLogix® 5570 / GuardLogix® 5572S |
| Product Type | Integrated Safety PAC (Standard + Safety Control) |
| User Memory | 4 MB (standard control) + 2 MB (safety control) |
| I/O Capacity | 128,000 digital I/O / 4,000 analog I/O / up to 100 motion axes (CIP Motion) |
| EtherNet/IP Nodes | Max. 528 nodes |
| Built‑in Ports | 1x USB 2.0 (programming), 1x 10/100Mbps Ethernet (EtherNet/IP) |
| Non‑Volatile Memory | Secure Digital (SD) card option, 1 GB included |
| Replacement Battery | 1756‑ESMCAP |
| Safety Certification | IEC 61508 SIL3, ISO 13849‑1 PLe, EN 954‑1 Cat.4 |
| Power Consumption | 2.5 W typical (5.1V DC @ 800 mA; 1.2V DC @ 5 mA) |
| Operating Temperature | 0°C to +60°C |
| Protection Class | IP20 (open‑type, rack‑mounted) |
| Programming Software | Studio 5000 Logix Designer (RSLogix 5000 compatible) |
| Lifecycle Status | Active / Mature |
| Model | Description | Typical Application |
|---|---|---|
| 1756-L71S | GuardLogix controller, 2 MB standard + 1 MB safety memory | Smaller‑scale safety applications |
| 1756-L73S | GuardLogix controller, 8 MB standard + 4 MB safety memory | Larger, more complex safety systems |
| 1756-L72 | Standard ControlLogix 5572 controller (no safety, 4 MB) | Non‑safety applications requiring same capacity |
| 1756-L62S | Older GuardLogix model (4 MB + 1 MB safety) – predecessor of L72S | Legacy system replacement – L72S is the direct upgrade |
| 1756-IB8S / 1756-OB8S | GuardLogix safety I/O modules | Safety input/output expansion |
| 1756-ESMCAP | Replacement battery for memory retention | Spare battery for the controller |
| 1784-SD1 | 1 GB Secure Digital memory card | Program backup and data logging |
| 2711P-T10C22D9P | 1756-PAR2 | 1769-OF8C |
| 2711-K10C3 | 1756-A4 | 1769-IF8 |
| 2711-K5A2 | 1756-RMC1 | 1769-IF16C |
| 2711-K5A20 | 1756-PAR2 | 1769-IR6 |
| 2711P-T10C4D8 | 1756-N2 | 1769-OW16 |
| 2711P-T7C22D9P | 1756-A10 | 1769-PA4 |
| 2711P-RP8D | 1756-IF16 | 1747-L553/C |
| 2711P-T12W22D9P | 1756-OF8 | 1783-LMS8 |
| 2711P-T7C21DBS | 1756-IB16 | 1783-USBT |
| 2711PT15C21D8S | 1756-OB16 | 1784-CF64 |
| 2711P-T10C21D8S | 1756-TBCH | 1734-OE2C |
| 2711P-T12C4D8 | 1756-TBNH | 1734-IR2E |
| 2711P-RDT10C | 1756 L83E | 1734-OB8S |
| 2711P-K10C4D8 | 1756 IF8H | MVI56E-MNET |
| 2198-H015-ERS | 1756-OB16E | 1715-AENTER |
| 2198-H025-ERS2 | 1756-IR6I | EXTER T150 |
| 2094-BM01-S | 1756-PB72 | 1756-IF16 |
Q1: What is the main difference between the 1756‑L72S and the standard 1756‑L72?
The 1756‑L72S is the safety‑certified GuardLogix version, which includes 2 MB of dedicated safety memory and an independent safety engine. The standard 1756‑L72 (non‑S) has no safety memory and cannot execute safety logic.
Q2: What safety standards does the 1756‑L72S comply with?
It is certified to IEC 61508 SIL3, ISO 13849‑1 PLe, and EN 954‑1 Cat.4, making it suitable for the highest safety integrity level applications.
Q3: Is the 1756‑L72S compatible with older ControlLogix chassis and I/O?
Yes. It mounts in standard ControlLogix 1756 chassis and is compatible with all 1756 series I/O modules, including safety-rated modules like 1756‑IB8S and 1756‑OB8S.
Q4: What software is required to program the 1756‑L72S?
The controller must be programmed with Studio 5000 Logix Designer (formerly RSLogix 5000). It does not support Connected Components Workbench or RSLogix 500.
Q5: Is the 1756‑L72S still in production or has it been discontinued?
The 1756‑L72S is an active / mature product, still available from Rockwell Automation and its distributors. It remains the recommended solution for new GuardLogix projects with this memory capacity.
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