ProSoft MVI56-MDA4 – ControlLogix Gateway for MDA Scientific CM4 Gas Analyzers | MVI56 Platform
Engineering Background: Industrial process environments that rely on MDA Scientific CM4 multi-gas analyzers require a deterministic, high-integrity communication bridge to Rockwell Automation ControlLogix PLCs. Legacy serial protocols used by the CM4 are incompatible with native ControlLogix backplane I/O, creating an integration gap that the MVI56-MDA4 was purpose-built to close.
Product Positioning: The ProSoft MVI56-MDA4 is a single-slot ControlLogix communication gateway module that translates the proprietary MDA Scientific CM4 gas analyzer protocol into native ControlLogix tag data. It enables procurement engineers and system integrators to embed real-time gas concentration data—CO, H₂S, O₂, and combustibles—directly into ControlLogix controller tags without custom ladder logic or external converters. Designed for hazardous-area monitoring, confined-space safety systems, and continuous emissions monitoring (CEMS) applications.
Complete Technical Specifications
- Part Number: MVI56-MDA4
- Manufacturer: ProSoft Technology
- Platform Compatibility: Rockwell Automation ControlLogix (1756 chassis)
- Analyzer Protocol: MDA Scientific CM4 proprietary serial
- Backplane Interface: ControlLogix 1756 backplane (1 slot)
- Serial Ports: Up to 4 × RS-232/RS-485 ports for CM4 analyzer connections
- Baud Rate Support: 300 – 115,200 bps
- Data Update Rate: Configurable; typically <100 ms per analyzer channel
- Power Consumption: Supplied via ControlLogix backplane (no external power required)
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -40 °C to +85 °C
- Humidity: 5 – 95% RH, non-condensing
- Certifications: CE, UL Listed (verify current listing with ProSoft)
- Form Factor: Single-slot 1756 ControlLogix module
- Weight: 230 g (approx.)
- Firmware: Field-upgradeable via ProSoft Configuration Builder (PCB)
- Configuration Tool: ProSoft Configuration Builder (PCB) – free download
Proven Application Environments
- Confined-space gas monitoring systems (CO, H₂S, O₂, LEL)
- Continuous Emissions Monitoring Systems (CEMS) in power generation and petrochemical plants
- Wastewater treatment facility gas safety networks
- Offshore platform atmospheric monitoring integrated with DCS/PLC safety layers
- Industrial HVAC and ventilation control with real-time gas feedback
- Mining and tunneling atmospheric safety systems
Engineering Advantages
- Zero-slot-waste design: Occupies a single 1756 chassis slot; no dedicated rack required.
- Native tag integration: CM4 analyzer data appears as standard ControlLogix UDT tags—no MSG instructions or custom AOIs needed for basic operation.
- Multi-analyzer support: Up to 4 CM4 analyzers per module; multiple modules can be deployed in the same chassis for larger networks.
- Deterministic data delivery: Backplane communication ensures scan-cycle-synchronized data availability for safety-critical ladder logic.
- Diagnostic transparency: Module status, port activity, and error counters are exposed as ControlLogix tags for HMI alarming and historian logging.
- Hot-swap capable: Supports ControlLogix chassis hot-swap for maintenance without full system shutdown (verify with site safety procedures).
System Architecture & Signal Flow
Each MDA Scientific CM4 analyzer connects to one of the MVI56-MDA4’s serial ports via RS-232 or RS-485 cabling. The module polls each analyzer at the configured interval, parses the CM4 response frame, and maps gas concentration values, alarm states, and fault codes into the ControlLogix producer/consumer tag table. The ControlLogix CPU reads these tags on every scan cycle. Configuration is performed offline using ProSoft Configuration Builder and downloaded to the module via the backplane or a direct RS-232 CFG port.
Sourcing & Quality Verification
- All units sourced through verified industrial automation supply channels.
- Each module inspected for physical integrity, label authenticity, and firmware version prior to dispatch.
- Serialized units traceable to ProSoft Technology manufacturing records where applicable.
- Konmask.com provides a 90-day functional warranty on all stocked modules.
- Counterfeit-risk mitigation: we do not source from unverified grey-market brokers.
Procurement Process
- Confirm compatibility: Verify your ControlLogix chassis revision and CM4 firmware version against ProSoft’s compatibility matrix (available on request).
- Request a quote: Contact support@konmask.com for volume pricing, lead time, and export documentation.
- Place order: Purchase directly via this listing or via PO/wire transfer for B2B orders.
- Shipping: DHL / FedEx international express; EXW Xiamen, China. Typical transit: 3–7 business days worldwide.
- Documentation: Commercial invoice, packing list, and HS code 8537.10 declaration provided with every shipment.
Technical FAQ
- Q: Can the MVI56-MDA4 connect to CM4 analyzers over RS-485 multi-drop?
- A: Yes. Each port supports RS-485 two-wire multi-drop topology. Consult ProSoft’s wiring guide for termination resistor placement.
- Q: Is the module compatible with ControlLogix V20+ firmware?
- A: Compatibility depends on the module firmware revision. Contact us with your chassis firmware version for confirmation.
- Q: Do you provide the ProSoft Configuration Builder (PCB) project file?
- A: A sample PCB project template is available upon request with purchase. PCB software is free from ProSoft Technology’s website.
- Q: What is the lead time for out-of-stock units?
- A: Typical sourcing lead time is 2–4 weeks. Contact us to join the pre-order queue.
- Q: Can this module be used in SIL-rated safety systems?
- A: The MVI56-MDA4 is not SIL-certified. For SIL applications, consult ProSoft Technology directly for safety-rated alternatives.
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