Honeywell 2MLQ-RY1A-CC / 2MLQ-RY2A-CC / 2MLQ-RY2B-CC – Digital Output Relay Module | Safety Manager Platform
The Honeywell 2MLQ-RY1A-CC, 2MLQ-RY2A-CC, and 2MLQ-RY2B-CC are certified digital output relay modules engineered for Honeywell’s Safety Manager safety instrumented system (SIS) platform. These modules provide hardwired relay-based discrete output capability for final control elements in safety-critical process environments, including emergency shutdown (ESD), fire & gas (F&G), and burner management systems (BMS).
Engineering Background: Honeywell Safety Manager is a TÜV-certified SIL 3-capable safety controller widely deployed in oil & gas, petrochemical, power generation, and chemical processing facilities. The 2MLQ relay output series is purpose-built for this platform, delivering deterministic, fail-safe switching performance with full diagnostic coverage required under IEC 61508 and IEC 61511.
Product Positioning: Konmask.com supplies these modules as verified OEM components, sourced through authorized channels and subject to multi-point quality inspection. Suitable for new installations, system expansions, and MRO (maintenance, repair & operations) replacement requirements.
Complete Technical Specifications
| Parameter | 2MLQ-RY1A-CC | 2MLQ-RY2A-CC | 2MLQ-RY2B-CC |
|---|---|---|---|
| Module Type | Digital Output – Relay | ||
| Platform | Honeywell Safety Manager (SM) | ||
| Output Channels | Single relay output | Dual relay output | Dual relay output (variant B) |
| Output Type | Dry contact relay (SPDT / DPDT) | ||
| Contact Rating | 24 VDC / 120 VAC, up to 2A | ||
| Safety Integrity Level | SIL 2 capable (SIL 3 in redundant config) | ||
| Diagnostic Coverage | >90% (per IEC 61508) | ||
| Communication | Backplane bus (Safety Manager chassis) | ||
| Operating Temperature | 0°C to +60°C | ||
| Humidity | 5% to 95% RH, non-condensing | ||
| Power Consumption | Per chassis specification | ||
| Mounting | Safety Manager I/O chassis slot | ||
| Certifications | TÜV, CE, UL/CSA (refer to datasheet) | ||
| Weight | ~240 g | ||
| Part Numbers | 2MLQ-RY1A-CC | 2MLQ-RY2A-CC | 2MLQ-RY2B-CC |
Proven Application Environments
- Oil & Gas: Emergency shutdown (ESD) systems, wellhead control panels, pipeline isolation valves
- Petrochemical & Refining: Reactor protection, high-integrity pressure protection systems (HIPPS)
- Power Generation: Turbine trip systems, boiler protection, burner management (BMS)
- Fire & Gas: Deluge valve actuation, suppression system triggers, alarm annunciation
- Chemical Processing: Interlock logic for agitators, pumps, and isolation valves
- LNG / Offshore Platforms: Safety-rated discrete output for remote I/O in hazardous areas
Engineering Advantages
- SIL-Certified Relay Output: Meets IEC 61508 SIL 2/3 requirements for safety instrumented functions (SIF)
- High Diagnostic Coverage: Internal self-diagnostics detect stuck contacts, open circuits, and coil faults
- Deterministic Response: Fixed scan-cycle execution ensures predictable trip response times
- Hot-Swap Compatible: Supports module replacement without full system shutdown (chassis-dependent)
- Galvanic Isolation: Relay contacts are electrically isolated from logic circuitry, protecting controller integrity
- Compact Form Factor: Standard Safety Manager I/O slot footprint simplifies chassis planning
- Long Service Life: Rated for high mechanical endurance; suitable for 20+ year plant lifecycle
System Architecture & Signal Flow
The 2MLQ-RY series modules reside in the Safety Manager I/O chassis and communicate via the internal backplane bus to the Safety Manager controller (SMC). The controller executes the safety application logic (IEC 61131-3 / Function Block) and commands the relay output module to energize or de-energize relay contacts based on the evaluated safety function state.
Signal path: SMC Logic Solver → Backplane Bus → 2MLQ-RY Module → Relay Contact → Field Device (valve actuator / solenoid / alarm)
Wiring termination is via the module’s front-face terminal block or associated marshalling cabinet, depending on installation design. Refer to Honeywell Safety Manager I/O Installation Guide (document SM-IOM-xxx) for wiring diagrams and chassis slot assignments.
Sourcing & Quality Verification
- OEM Origin: All units are genuine Honeywell-manufactured components; no third-party rebrands or refurbished stock
- Inspection Protocol: Each module undergoes visual inspection, label verification, and functional continuity check prior to shipment
- Packaging: Shipped in original or equivalent ESD-safe anti-static packaging with protective foam inserts
- Traceability: Batch and serial number documentation available upon request for regulated industries
- Warranty: 12-month Konmask supply warranty against manufacturing defects; RMA process available
Procurement Process
- Confirm Part Number: Verify 2MLQ-RY1A-CC, 2MLQ-RY2A-CC, or 2MLQ-RY2B-CC against your Safety Manager BOM or I/O list
- Request Quote: Contact support@konmask.com or +0086 19859288691 for volume pricing and lead time
- Submit PO: Purchase orders accepted via email; proforma invoice issued within 24 hours
- Shipping: DHL / FedEx express worldwide; EXW Xiamen or CIF destination available
- Documentation: Commercial invoice, packing list, and certificate of conformance provided with each shipment
Technical FAQ
Q: Are 2MLQ-RY1A-CC, 2MLQ-RY2A-CC, and 2MLQ-RY2B-CC interchangeable?
A: No. Each variant has a different channel count and contact configuration. Confirm your I/O list before ordering. The -RY1A has a single relay output; -RY2A and -RY2B have dual relay outputs with different contact arrangements.
Q: Can these modules be used outside of Safety Manager?
A: These modules are designed exclusively for the Honeywell Safety Manager chassis and backplane. They are not compatible with HC900, Experion, or third-party DCS/PLC systems.
Q: What is the SIL rating for a single module?
A: SIL 2 in simplex configuration. SIL 3 can be achieved through redundant (1oo2 or 2oo3) architectures as defined in the Safety Manager system design documentation.
Q: Do you provide the Honeywell datasheet or SIL certificate?
A: Yes. Contact us at support@konmask.com and we will provide the relevant Honeywell technical documentation and TÜV SIL certificate upon request.
Q: What is the typical lead time?
A: In-stock units ship within 3–5 business days. For out-of-stock items, lead time is 4–8 weeks depending on Honeywell production schedule.
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Contact: support@konmask.com | +0086 19859288691
