Mido MD202 Control Box for Burner Controller — Industrial Burner Management Module

Mido · MD202 · Burner Sequence Controller · In Stock

The Mido MD202 is an industrial burner management control box used to sequence and supervise gas, oil and dual-fuel burners on packaged boilers, hot oil heaters, kiln burners and process heat treatment furnaces. It bundles pre-purge timing, pilot ignition, main flame proving, modulation hand-off and post-purge logic into a single plug-style chassis, paired with a flame safeguard input (UV cell or ionization probe) and a hard-wired lockout / alarm relay. KOEED stocks the MD202 alongside cross-reference units from Siemens LFL and Honeywell S7800 flame safeguard families, so plant maintenance teams can keep legacy and current burner panels running without re-engineering the wiring loom. Send a model list to Moritta@KOEED.COM for stock confirmation within 24 business hours.

Key Technical Specifications / Overview

The MD202 chassis hosts the complete sequence engine and hard-wired safety interlocks for a single-burner panel. Below is a ledger-style spec sheet collated from common Mido data and adjacent burner-controller families ( browse all collections for related controls ). Final acceptance values should always be cross-checked against the unit nameplate before commissioning.

Application Scenarios / Where It Fits

The MD202 sits inside any panel that asks for deterministic burner sequencing with hard-wired flame safety, so it shows up across heavy and light process industries. Typical deployments observed by KOEED engineers:

• Industrial steam and hot-water packaged boilers (firetube and watertube) on food, beverage and pharma sites
• Thermal oil heaters serving asphalt, bitumen and chemical reactor jackets
• Drying ovens, paint cure ovens and powder-coat tunnels in metal-finishing lines
• Kiln burners on lime, ceramic and refractory plants
• Heat-treatment furnaces (annealing, tempering, normalizing) wired into a Siemens SIMATIC or Allen-Bradley ControlLogix supervisory PLC
• Asphalt-plant and grain-dryer burners that must restart unattended in cold ambient
• CIP / sterilization steam skids in food processing plants

Across these sectors the MD202 is most often retrofitted onto an existing panel where the original burner controller (often a discontinued Honeywell, Siemens LFL or Brahma module) is no longer supplied. KOEED keeps adjacent multi-brand stock — Mitsubishi and Omron PLC cards, Schneider Modicon safety relays, Yaskawa drive spares for combustion-air fans, KEYENCE flame-front photoelectric sensors and Panasonic FP mini-PLCs — so a single BOM can refit the burner panel in one shipment.

Integration & Wiring Notes

The MD202 is wired into the panel through its multi-pin sub-base, not directly to terminal strips on the chassis face. Treat it as a plug-replaceable module: keep all field wiring on the sub-base and the controller becomes a single-screwdriver swap-out during fault finding. A few integration rules of thumb when adopting MD202 in an existing burner panel:

• Permissive chain: high / low gas pressure switches, air-proving switch, high limit and operating thermostat must all be wired into the start permissive — the MD202 does not start the sequence until that chain is closed.
• Flame probe routing: route the UV / ionization cable in its own conduit, separated from ignition transformer leads, to avoid pickup that masks a true flame-failure event.
• Ignition transformer: the MD202 ignition output drives a step-up transformer (typically 6–10 kV) — keep secondary leads short and use a clean earth path back to the burner body.
• Valve proving: for dual-fuel and larger gas burners, the valve-proving system (VPS) interlock should drop into the MD202 lockout circuit, not into the main fuel-valve coil.
• PLC supervision: the alarm / lockout relay maps cleanly into a DI on Allen-Bradley 1756 / 1769, Siemens S7-1200 / S7-1500, Mitsubishi MELSEC FX / Q or Omron CP1 / CJ2 input cards for SCADA alarming.
• Drive interaction: if combustion-air fan speed is governed by a Schneider Altivar or Yaskawa Varispeed drive, anchor the run command to the MD202 air-proving stage — never let the drive coast through a lockout.
• CNC / robotics adjacent lines: for furnaces inside Fanuc robotic heat-treat cells, hand-shake the MD202 alarm relay into the cell-controller emergency-stop string.

When in doubt, send the existing panel drawing and burner data plate to Moritta@KOEED.COM together with the BOM — the KOEED engineering desk will mark up the pin-out equivalence against the controller you are replacing.

Installation & Commissioning Tips

Burner-control commissioning is governed by site combustion-safety procedure first and any controller manual second. The notes below are practical only; do not bypass site sign-off.

1. Bench-test the chassis off the panel: apply mains, observe the sequence LEDs / cam, verify the unit reaches and holds stand-by without inputs.
2. Insulation test before plug-in: isolate the MD202 from the sub-base before any megger test on the panel — controller electronics will not survive a megohm injection.
3. Dry-run the sequence with the fuel train manually isolated. Confirm pre-purge time, ignition timing and the safety lockout time match the burner OEM data.
4. Flame failure test: with the burner alight, mechanically interrupt the flame at the probe (or remove the cell) and confirm the MD202 drops the fuel valve inside the rated safety time.
5. Lockout reset: verify the manual reset push-button releases lockout only after the cause is cleared — auto-reset is not acceptable on combustion equipment.
6. Document the cam / time settings on the panel itself so the next maintenance shift inherits the same baseline.
7. Diagnostic helpers: the KOEED AI Diagnostic Tool can decode nameplate photos and propose like-for-like replacements; the PLC Error Code Database covers downstream SIMATIC / MELSEC alarms tied to the burner DI; engineers tuning 4–20 mA flame-trim signals may also use the PLC Analog Calculator.

Procurement, Warranty & Lead Time

KOEED operates as an independent multi-brand sourcing house from a Shenzhen / Hong Kong base, not as an authorised arm of any burner-controller OEM. The MD202 is supplied through KOEED's China Sourcing Company workflow alongside cross-reference parts from Honeywell, Siemens LFL / LME, Fireye and Brahma, with documented inbound QC before international dispatch. Engineers typically place an MD202 enquiry as part of a wider BOM that mixes Mido sequence controllers with Allen-Bradley, Siemens, Mitsubishi, Omron, Fanuc, Schneider, Yaskawa, Panasonic and KEYENCE spares — one PO, one airway bill.

Pricing is RFQ-driven and final values are confirmed only on the official quotation. To get a current MD202 quote with availability, lead time and freight options:

• Email the model list, target quantity and destination port to Moritta@KOEED.COM
• Or submit the BOM through the Create a Quote form
• For non-pricing technical questions, use the Contact Us page
• For wider context on the source workflow, see the About KOEED overview
• For ongoing stock movement and recent shipments related to burner controls, follow the Daily PLC News blog