ABB CL-LMR.CX18DC2 + CL-LER.18DC2 – Relay Output Expansion Module | AC500 PLC Platform
Engineering Background
The ABB AC500 series is a scalable, modular PLC platform engineered for demanding industrial automation environments. Designed to IEC 61131-3 standards, the AC500 architecture supports distributed I/O expansion via the S500 I/O bus, enabling engineers to build compact or large-scale control systems with deterministic performance. The CL-LMR.CX18DC2 CPU module paired with the CL-LER.18DC2 relay output expansion module represents a proven combination for mixed digital I/O applications requiring both high-density DC inputs and isolated relay switching outputs.
Product Positioning
This bundle is purpose-built for procurement engineers sourcing verified OEM components for machine control, process automation, and panel-building projects. Konmask.com supplies this unit as a tested, traceable assembly — suitable for new installations, system expansions, and MRO (Maintenance, Repair & Operations) replacement programs.
Complete Technical Specifications
| Parameter | CL-LMR.CX18DC2 (CPU/Base) | CL-LER.18DC2 (Expansion) |
|---|---|---|
| Module Type | CPU / Local I/O Base Module | Digital Relay Output Expansion |
| Digital Inputs | 18 × DC 24V inputs | 18 × DC 24V inputs |
| Digital Outputs | Relay outputs (integrated) | Relay outputs (expansion) |
| Supply Voltage | 24V DC | 24V DC |
| Input Signal Level | IEC 61131-2 Type 1/3 | IEC 61131-2 Type 1/3 |
| Output Contact Rating | Relay, 250V AC / 30V DC, 2A | Relay, 250V AC / 30V DC, 2A |
| Isolation | Galvanic isolation per group | Galvanic isolation per group |
| Bus Interface | AC500 S500 I/O Bus | AC500 S500 I/O Bus |
| Protection Rating | IP20 | IP20 |
| Operating Temperature | -25°C to +60°C | -25°C to +60°C |
| Storage Temperature | -40°C to +70°C | -40°C to +70°C |
| Humidity | 5–95% RH, non-condensing | 5–95% RH, non-condensing |
| Mounting | DIN rail (EN 60715) | DIN rail (EN 60715) |
| Weight | ~1800 g | ~1800 g |
| Certifications | CE, UL, cUL, ATEX (option) | CE, UL, cUL |
| Programming Standard | IEC 61131-3 (CoDeSys-based) | N/A (I/O expansion) |
| Country of Origin | Germany | Germany |
Proven Application Environments
- Machine Automation: Conveyor systems, packaging lines, and press control requiring mixed DC input / relay output logic.
- Building Automation: HVAC control panels, pump station management, and lighting control with isolated relay switching.
- Process Industries: Water treatment, chemical dosing, and energy management systems demanding IEC-compliant PLC platforms.
- Panel Building: OEM machine builders integrating ABB AC500 as the primary control architecture.
- MRO / Replacement: Direct drop-in replacement for existing AC500 installations requiring CL-LMR.CX18DC2 + CL-LER.18DC2 assemblies.
Engineering Advantages
- Galvanic Isolation: Relay outputs provide full electrical isolation between control and field circuits, protecting sensitive PLC logic from inductive load transients.
- High-Density I/O: 18 DC inputs per module maximizes cabinet space efficiency without sacrificing signal integrity.
- Scalable Architecture: The AC500 S500 bus allows seamless expansion — add further I/O modules without CPU replacement.
- Wide Temperature Range: -25°C to +60°C operating range supports outdoor enclosures and harsh industrial environments.
- IEC 61131-3 Compliance: Supports all five standard PLC programming languages (LD, FBD, ST, IL, SFC) via ABB Automation Builder.
- DIN Rail Mounting: Standard EN 60715 DIN rail installation ensures compatibility with all major panel configurations.
System Architecture & Signal Flow
The CL-LMR.CX18DC2 serves as the local CPU/base module, processing program logic and managing the S500 I/O bus. The CL-LER.18DC2 expansion module connects directly to the base via the integrated bus connector, extending the available relay output capacity without additional wiring infrastructure. Field signals enter via the 18-point DC input terminals, are processed by the CPU, and switching commands are issued through the relay output contacts — each contact group galvanically isolated for safe operation across mixed-voltage field devices.
Power supply: 24V DC to both modules via dedicated terminal blocks. Bus communication is handled internally at the backplane level, ensuring deterministic cycle times independent of field wiring length.
Sourcing & Quality Verification
- OEM Origin: All units sourced from authorized ABB distribution channels or verified surplus with full traceability documentation.
- Pre-shipment Inspection: Each assembly undergoes visual inspection, label verification, and functional continuity check prior to dispatch.
- Packaging: Shipped in anti-static ESD packaging with foam cushioning. Original ABB labeling and serial numbers intact.
- Documentation: ABB datasheet, CE declaration of conformity, and packing list included upon request.
- Warranty: 12-month Konmask warranty covering manufacturing defects. DOA replacement within 7 business days.
Procurement Process
- Confirm SKU: Verify part numbers CL-LMR.CX18DC2 and CL-LER.18DC2 against your BOM or existing panel documentation.
- Request Quote: Contact support@konmask.com for volume pricing, lead time confirmation, and export documentation (if required).
- Place Order: Secure checkout via Konmask.com. Payment terms available for qualified B2B accounts.
- Shipping: DHL / FedEx international express. Typical lead time: 3–7 business days from China. Customs documentation provided.
- Incoming Inspection: Recommended: verify serial numbers against ABB’s online product verification tool upon receipt.
Technical FAQ
Q: Is this a new or refurbished unit?
A: Units are sourced as new-in-box OEM or tested surplus. Condition is clearly stated in the order confirmation. Contact us to confirm stock condition before purchase.
Q: Can the CL-LER.18DC2 be used with other AC500 CPU modules?
A: Yes. The CL-LER.18DC2 is compatible with all AC500 CPU modules that support the S500 I/O bus. Verify compatibility with your specific CPU firmware version via ABB Automation Builder.
Q: What programming software is required?
A: ABB Automation Builder (CoDeSys-based). Free download available from ABB’s official portal. IEC 61131-3 programming environment.
Q: Do you provide export documentation for international shipments?
A: Yes. Commercial invoice, packing list, and HS code declaration (HS 8537.10) provided for all international orders.
Q: What is the HS code for customs clearance?
A: HS Code 8537.10 — Boards, panels, consoles, desks, cabinets and other bases for electric control or the distribution of electricity.
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