Process & Discrete Manufacturing Automation Solution — Allen-Bradley 1785-L60L | PLC-5 Series
Where This Product Is Used
The Allen-Bradley 1785-L60L PLC-5/60L Processor is a high-performance programmable logic controller deployed across demanding industrial environments where reliability, scan-time determinism, and large I/O capacity are non-negotiable. Typical deployment sites include:
- Continuous Process Plants — Oil & gas refineries, chemical batch reactors, and water/wastewater treatment facilities requiring coordinated multi-loop control.
- Automotive Assembly Lines — Body-in-white welding cells, paint-shop conveyors, and powertrain test stands where high-speed discrete I/O sequencing is critical.
- Food & Beverage Processing — CIP (Clean-In-Place) systems, pasteurization lines, and packaging machinery operating under FDA/HACCP compliance.
- Pulp & Paper Mills — Stock preparation, digester control, and winder/rewinder coordination across distributed I/O racks.
- Mining & Minerals Processing — Crusher control, conveyor interlocking, and flotation cell management in harsh, high-vibration environments.
- Power Generation & Utilities — Turbine auxiliary systems, switchgear control, and SCADA-integrated substation automation.
- Semiconductor & Electronics Fab — Cleanroom HVAC control, wafer-handling robotics, and process gas management systems.
Technical Specifications
| Catalog Number | 1785-L60L |
| Series / Model | PLC-5/60L |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Processor Memory | 64K words (user program + data) |
| Max Local I/O | Up to 3,072 I/O points (local chassis) |
| Max Remote I/O | Up to 8,192 I/O points via Remote I/O link |
| Communication Ports | DH+ (Data Highway Plus), Remote I/O Scanner |
| Programming Software | RSLogix 5 (Rockwell Automation) |
| Backplane Compatibility | 1771 I/O chassis (PLC-5 family) |
| Power Supply | Requires 1771-P4S or compatible 1771 power supply |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% non-condensing |
| Weight | 1,420 g (approx.) |
| Form Factor | Single-slot 1771 chassis module |
Why Engineers Specify This Model
- Large Memory Headroom — 64K-word program/data space accommodates complex ladder logic, function block, and structured text programs without memory partitioning compromises.
- Proven DH+ Ecosystem — Native Data Highway Plus port enables peer-to-peer messaging, HMI connectivity (PanelView), and SCADA integration without additional communication modules.
- Massive I/O Scalability — Remote I/O scanner supports up to 8,192 distributed I/O points across multiple 1771 chassis, ideal for plant-wide architectures.
- Deterministic Scan Performance — Fixed-scan-time execution ensures predictable response in safety-critical interlocking and high-speed sequencing applications.
- Legacy System Continuity — Drop-in replacement for existing PLC-5/60 and PLC-5/60L installations, preserving validated programs and minimizing re-commissioning risk.
- Broad Third-Party Support — Supported by a wide ecosystem of HMI, historian, and MES software via DH+ and DF1 protocols.
Complete System Bill of Materials
A fully operational PLC-5/60L control system typically requires the following components:
- 1785-L60L — PLC-5/60L Processor (this item)
- 1771-A4B / 1771-A2B — 1771 I/O Chassis (4-slot or 8-slot)
- 1771-P4S — Power Supply Module for 1771 chassis
- 1771-IB / 1771-OB — Digital Input / Output Modules (24 VDC)
- 1771-IF / 1771-OF — Analog Input / Output Modules
- 1784-KTX / 1784-PKTX — DH+ Communication Card (for RSLogix 5 programming)
- 1770-XY — DH+ Terminating Resistor Kit
- 6189V-XXXX — Industrial PC with RSLogix 5 for programming and diagnostics
Contact Konmask for bundle pricing on complete system builds.
Compliance & Industry Standards
- UL Listed — UL 508 (Industrial Control Equipment)
- CE Marked — Compliant with EU Low Voltage Directive and EMC Directive
- CSA Certified — Canadian Standards Association approval for industrial use
- IEC 61131-3 — Programming language standard compliance (Ladder Diagram, Structured Text)
- NEMA 4 / IP65 — When installed in appropriate enclosure
- RoHS Compliant — Restriction of Hazardous Substances (where applicable to production date)
Quality Assurance & Sourcing
Every 1785-L60L unit offered through Konmask.com undergoes a structured quality verification process before dispatch:
- Visual Inspection — Board-level examination for corrosion, damaged traces, missing components, and counterfeit indicators.
- Functional Power-On Test — Unit is powered in a 1771 chassis to verify processor boot, memory self-test pass, and LED status confirmation.
- Firmware Version Verification — Firmware series and revision recorded and disclosed prior to shipment.
- Anti-Static Packaging — Shipped in ESD-safe bags with foam cushioning inside double-wall corrugated cartons.
- Traceability Documentation — Batch records and inspection reports available upon request for MRO and OEM procurement teams.
Units are sourced from authorized distributors, certified surplus channels, and decommissioned plant equipment with full chain-of-custody documentation.
How to Source This Part
- Add to Cart — Select quantity and proceed to checkout directly on this page.
- Request a Quote — For orders of 2+ units, volume pricing, or lead-time confirmation, email support@konmask.com with your PO requirements.
- Expedited Sourcing — If this unit is out of stock, contact us via WhatsApp/WeChat at +0086 19859288691 — we maintain access to secondary market channels for urgent MRO needs.
- OEM / System Integrator Accounts — Registered SI and OEM partners receive priority allocation, net-30 terms, and dedicated account management. Apply via email.
Typical lead time: 1–5 business days for in-stock units. International shipping available with DDP/DAP Incoterms upon request.
Application-Specific FAQ
Q: Can the 1785-L60L replace a 1785-L60 (non-L variant) in an existing installation?
A: Yes. The L60L is functionally equivalent to the L60 with identical memory and I/O capacity. Verify chassis slot compatibility and power supply ratings before swapping.
Q: What programming software is required?
A: RSLogix 5 (v8.x or later recommended) running on a Windows PC with a 1784-KTX or 1784-PKTX DH+ communication card. RSLinx Classic is required for device driver configuration.
Q: Is the 1785-L60L compatible with ControlNet or EtherNet/IP?
A: No. The PLC-5/60L natively supports DH+ and Remote I/O only. For EtherNet/IP connectivity, a 1785-ENET bridge module or migration to a ControlLogix platform should be evaluated.
Q: Can this processor handle motion control applications?
A: The 1785-L60L supports basic coordinated motion via 1771 servo modules (e.g., 1771-QA), but is not recommended for high-axis-count CNC or advanced motion profiles. Consider the ControlLogix 1756 platform for new motion-intensive designs.
Q: What is the typical service life for a refurbished 1785-L60L?
A: With proper installation (within rated temperature/humidity), capacitor health, and battery maintenance (1785-BA lithium battery), a refurbished unit can deliver 5–10+ years of reliable service in non-critical auxiliary roles.
Q: Do you provide warranty?
A: Yes. All units carry a 90-day functional warranty covering processor failure under normal operating conditions. Extended warranty options are available — contact us for details.
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Contact: support@konmask.com | +0086 19859288691
