Process Control Solution – Honeywell 2MLQ-TR4B-CC | 4-Channel Relay Digital Output Module | Experion / TDC 3000 Series
Where This Product Is Used
The Honeywell 2MLQ-TR4B-CC 4-channel relay digital output module is deployed across demanding industrial environments where reliable discrete relay output control is mission-critical. Typical application sites include:
- Oil & Gas Refineries – Actuator and solenoid valve control in SCADA-integrated DCS architectures
- Chemical & Petrochemical Plants – Safe-state output switching in SIL-rated process loops
- Power Generation Facilities – Turbine auxiliary control and load-shedding relay logic
- Pulp & Paper Mills – Conveyor drive enable/disable and motor starter interlock circuits
- Water & Wastewater Treatment – Pump station on/off control integrated with Honeywell Experion PKS
- Pharmaceutical Manufacturing – GMP-compliant batch process output switching with full audit trail
Technical Specifications
| Part Number | 2MLQ-TR4B-CC |
| Manufacturer | Honeywell Process Solutions |
| Module Type | Digital Output Module (Relay) |
| Series | Honeywell Experion PKS / TDC 3000 I/O Series |
| Output Type | Relay Contact (Dry Contact) |
| Number of Output Channels | 4 Channels |
| Output Voltage Range | 24 VDC / 120–240 VAC (field-side) |
| Contact Rating | 2 A resistive load (typical) |
| Communication Interface | DCS backplane / C300 controller compatible |
| Isolation | Optical isolation, channel-to-backplane |
| PCB Coating | Conformal coated (-CC suffix) for humidity & corrosion resistance |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Mounting | DIN rail / Honeywell I/O chassis |
| Certifications | CE, UL Listed (verify current datasheet) |
| Condition Available | New / Refurbished / Tested Surplus |
Why Engineers Specify This Model
- Proven DCS Integration – Designed natively for Honeywell Experion PKS and TDC 3000 platforms; no gateway or protocol conversion required
- Conformal Coated PCB (-CC) – Enhanced protection against humidity and corrosive atmospheres versus standard variant
- Relay Output Flexibility – Dry contact outputs support both AC and DC field devices, reducing BOM complexity
- High Noise Immunity – Optical isolation protects controller backplane from field-side transients in electrically noisy plant environments
- Hot-Swap Capable – Supports online replacement in redundant I/O configurations, minimizing process downtime
- Long Service Life – Industrial-grade relay contacts rated for millions of operations under normal load
- Compact Channel Density – 4-channel format optimizes chassis slot utilization in space-constrained control cabinets
Complete System Bill of Materials
For a fully operational Honeywell DCS digital output loop, engineers typically specify:
- Honeywell 2MLQ-TR4B-CC – Digital Output Module (this item)
- Honeywell C300 Process Controller – Loop execution and I/O scanning
- Honeywell IOTA / I/O Termination Assembly – Field wiring termination block
- Honeywell Experion PKS Server – Operator station and historian
- 24 VDC Power Supply Module – Chassis and field power
- Shielded Twisted-Pair Cable – Field wiring to actuators/solenoids
- DIN Rail Relay or Solid-State Relay (optional) – For high-current field loads
Compliance & Industry Standards
- IEC 61131-2 – Programmable controller hardware requirements
- IEC 61508 / IEC 61511 – Functional safety (SIL) framework compatibility (verify SIL rating with Honeywell datasheet)
- ATEX / IECEx – Consult Honeywell for zone-rated barrier requirements when deploying in hazardous areas
- RoHS Compliant – Restriction of Hazardous Substances (EU Directive 2011/65/EU)
- CE Marked – European conformity for EMC and Low Voltage Directive
Quality Assurance & Sourcing
Every Honeywell 2MLQ-TR4B-CC unit shipped by Konmask.com undergoes the following quality process:
- Visual inspection for physical damage, corrosion, and connector integrity
- Functional power-on test and channel continuity verification
- Firmware version check and documentation of revision level
- Anti-static packaging with humidity indicator card
- Traceable sourcing from authorized distributors or verified surplus channels
Konmask.com maintains a strict no-counterfeit policy. All modules are sourced with full traceability documentation available upon request.
How to Source This Part
- Online: Add to cart directly on this page for standard stock orders
- Bulk / Project Inquiry: Email support@konmask.com with your project BOM for volume pricing
- Urgent Requirement: Call or WhatsApp +0086 19859288691 for same-day quotation
- Lead Time: In-stock units ship within 1–3 business days; ex-stock surplus subject to availability
- Export: We support worldwide export with commercial invoice, packing list, and COO documentation
Application-Specific FAQ
Q: Is the 2MLQ-TR4B-CC compatible with Honeywell Experion PKS R500 and above?
A: Yes. This module is designed for the Honeywell Experion I/O subsystem and is compatible with C300 controllers running R500+ firmware. Confirm compatibility with your specific chassis revision before installation.
Q: Can this module be used in a Safety Instrumented System (SIS)?
A: The 2MLQ-TR4B-CC is a standard DCS output module. For SIL-rated SIS applications, Honeywell’s Safety Manager or FSC platform with dedicated safety I/O modules should be specified instead.
Q: What does the “-CC” suffix mean on 2MLQ-TR4B-CC vs 2MLQ-TR4B?
A: The “-CC” suffix denotes a conformal-coated PCB variant, providing enhanced protection against humidity and corrosive atmospheres. Recommended for harsh or coastal plant environments.
Q: Do you provide a warranty on surplus modules?
A: Yes. Konmask.com offers a 90-day functional warranty on all tested surplus modules. New-in-box units carry the original Honeywell manufacturer warranty.
Q: Can I return a module if it does not match my system?
A: Please contact support@konmask.com before purchase to confirm compatibility. Returns are accepted within 14 days for uninstalled modules in original packaging.
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Contact: support@konmask.com | +0086 19859288691
