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The Allen-Bradley 1756-L73EROM is a controllogix controller. The listed technical data shows communication via Würth Elektronik, based on the manufacturer's datasheet. It is supplied by SHLY-PLC, an independent industrial-automation distributor: every unit is visually inspected and functionally checked before dispatch, held in ready stock and shipped worldwide for maintenance, spares and retrofit use. Share your application or existing part number and our team will confirm fitment and comparable in-stock alternatives.
Technical parameters compiled from the manufacturer data sheet and reference documentation.
| Technical Specifications | |
| Type Designation | |
| Wire category(3) | 3 - on USB ports |
| Enclosure type rating | None (open-style) |
| Power Supply | |
| Power supply, standard | 1756-PAXT, 1756-PA30XT, 1756-PBXT, 1756-PB30XT |
| Power supply, redundant | 1756-PAXTR, 1756-PBXTR |
| Voltage variation | IEC 61000-4-29 |
| Power dissipation | 9.0 W, max |
| Power supply, standard | 1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75 |
| Power supply, redundant | 1756-PA75R, 1756-PB75R, 1756-PSCA2 |
| Inputs & Outputs | |
| Embedded Network Port | True |
| Local Programming Port | 1 USB |
| Motion Axis Supported | 256 |
| Corrected footnotes related to I/O Capacity and Message Rate Capacity | Throughout |
| Plug for Ethernet Port | Würth Elektronik |
| Plug for USB Port | Essentra Components |
| I/O memory | 0.98 MB |
| Digital I/O, max | 128,000 |
| Analog I/O, max | 4000 |
| USB port(2) | USB 2.0, full speed (12 Mbps) |
| Controller families, supported | ControlLogix 5560, ControlLogix 5570 |
| Communication & Interfaces | |
| Communication options | Standard on EtherNet/IP networks |
| Network connections | 512 EtherNet/IP and 256 TCP connections(1) |
| Mechanical | |
| Slot width | 1 |
| Slot width | 1 slot |
| Mounting | ControlLogix-XT chassis, single-slot module |
| Environmental | |
| Vibration | IEC 60068-2-6 (Test Fc, Operating) |
| Shock, operating | IEC 60068-2-27 (Test Ea, Unpackaged Shock) |
| Temperature code | T4 |
| Temperature, ambient, max | 60 °C (140 °F) |
| Compliance, Approvals & Standards | |
| Environmental Compliance | See Details | Submit Inquiry |
| Other | |
| Memory | 4MB User Memory, 0.98MB I/O |
| SVHC Information | View Guidance |
| Added information about the ControlLogix 5590 Controllers | 2...16 |
| Emissions | IEC 61000-6-4(1) |
| ESD immunity | IEC 61000-4-2 |
| Radiated RF immunity | IEC 61000-4-3 |
| EFT/B Immunity(2) | IEC 61000-4-4 |
| Surge Transient Immunity | IEC 61000-4-5 |
| Conducted RF Immunity | IEC 61000-4-6 |
| Emissions | IEC 61000-6-4(3) |
| Description | Supplier |
| Emissions | IEC 61000-6-4 |
| Controller redundancy | Full support |
| Integrated motion | • SERCOS interface • Analog options (encoder input, LDT input, SSI input) • Integrated Motion on the EtherNet/IP network |
| Programming languages | • Relay ladder logic • Structured text • Function Block Diagram • Sequential function chart (SFC) |
| Energy storage modules | • 1756-ESMCAPXT capacitor energy storage module (removable, ships installed with every controller) • 1756-ESMNSEXT capacitor energy storage module (removable, no residual WallClockTime power backup) • 1756-ESMNRMXT capacitor energy storage module (non-removable, prevents USB connection and SD card use to help secure thecontroller) |
| Thermal dissipation | 8.5 BTU/hr |
| Module location | Chassis-based, any slot |
| Chassis | For extended temperature applications, use 1756-A7XT and 1756-A10XT, Series C For extended temperature and corrosive atmosphere applications, use 1756-A7ZXT and 1756-A10ZXT For low temperature and corrosive atmosphere applications only, use 1756-A4K, 1756-A7K, 1756-A10K, 1756-A13K, 1756-A17K |
| Controller redundancy | Not supported |
| Programming languages | • Relay Ladder Logic (RLL) • Structured Text • Function Block Diagram • Sequential Function Chart (SFC) |
| Attribute | 1756-RM |
| Current draw @ 24V DC | 120 mA |
| Thermal dissipation | 31 BTU/hr |
| Chassis | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
Model variants, options and firmware revisions can affect fitment. Before ordering the Allen-Bradley 1756-L73EROM controllogix controller, share your existing part number or project requirements and our team will cross-reference comparable in-stock Allen-Bradley units and verify compatibility. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for identification only.
A: Each 1756-L73EROM is inspected and functionally checked before sale. Contact us for the current stock condition and quantity.
A: In-stock orders placed before 14:00 ship the same business day. Standard worldwide delivery is about 5-8 business days, express shipping is available and orders over $500 ship free.
A: Yes. Share your existing part number or application and our technical team will verify compatibility and provide cross-references to comparable in-stock models.
1756-L73EROM · Technical reference data · Independently supplied by SHLY-PLC
Place your order before 14:00 for earliest possible shipment handover. With round-the-clock transit operated by our partnered global logistics providers, parcels reach most international destinations following routine customs processing. Economy shipping takes 5–8 business days, while express delivery arrives in 5–8 business days, both subject to customs clearance progress.Shipping fees will be charged for all orders under USD 500, and the exact shipping cost will be determined and collected by our logistics carriers. Shipments to remote international regions will incur additional courier surcharges to offset extra cross-border transportation costs.
Factory warranty service is not applicable to this industrial control equipment, and extended warranty packages are not provided for this item.
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