HTS KS – Burner Control Unit BCU 570

Overview

The Honeywell BCU 570 is a burner control unit designed to control, ignite, and monitor individual or forced draught burners of unlimited capacity in intermittent or continuous operation. It performs central safety functions including pressure monitoring, integrated valve proving, and pre-purge sequencing, and controls an actuator to ensure safe and reliable ignition of the burner.

The BCU 570 is DIN rail mounted and supports flame supervision via UV sensor or ionization rod. It operates on 120 V or 230 V mains voltage and is certified to SIL up to 3 / PL e, with approvals covering EU, UL, FM, CSA, AGA, and EAC standards. Optional fieldbus communication via the BCM 500 module supports PROFINET and Modbus TCP integration.

Features & Benefits

• Controls, ignites, and monitors individual or forced draught burners of unlimited capacity in intermittent or continuous operation
• Integrated valve proving system (tightness control) on C1 variants with programmable test period — eliminates need for external proving components
• Flame supervision via ionization rod or UV sensor (UVS for intermittent, UVC for continuous operation)
• Mains voltage options: 120 VAC (Q variant) or 230 VAC (W variant), ±15%, 50/60 Hz — flexible for global installations
• DIN rail mounted for control cabinet installation — compact form factor (110 x 100 x 102 mm)
• LED segment display with fault and status codes for on-site diagnostics
• Manual mode available with configurable operating time
• Optional BCM 500 communication module adds PROFINET or Modbus TCP fieldbus connectivity
• Configurable via BCSoft software (Windows) and PCO 200 opto-adapter for parameterization without live mains
• Supports direct or pilot burner ignition in intermittent or continuous operation
• EU certified; approved to EN 746-2, EN 676, SIL up to 3, PL e, LVD, EMC, GAR, ANSI/CSA, FM, UL, AGA, and EAC

Technical Specifications

• Mains Voltage: 120 VAC (Q), 230 VAC (W), ±15%, 50/60 Hz
• Power Consumption: Approx. 1.2 VA (BCM); 0.7 W power loss
• Flame Signal Current — Ionization: 1–25 µA
• Flame Signal Current — UV: 1–35 µA
• Flame Control: Flame rod, UVS (intermittent), UVC (continuous)
• Fan Output Rating: Max 3 A; start-up current max 6 A for <1 s
• Valve Output Rating: Max 1 A each; total max 2.5 A
• Control Outputs: Fan, ignition, gas valves V1–V4, actuator, controller enable
• Signal Inputs: Start-up, controlled air flow, remote reset, safety interlock, pressure switches
• Display: LED segment display with fault/status codes
• Software Interface: BCSoft (Windows); opto-adapter PCO 200
• Fieldbus (optional): PROFINET or Modbus TCP via BCM 500 module
• Ambient Temperature Range: -20 to +60°C
• Enclosure Rating: IP20 (device); IP54 (installation cabinet); IP65 (OCU external)
• Dimensions: 110 x 100 x 102 mm
• Cable Length — Ionization/UV: Max 100 m
• Cable Length — OCU: Max 10 m
• Maximum Operating Cycles — Actuator: 250,000
• Maximum Operating Cycles — Buttons/Fault Signal Contact: 10,000
• Tightness Control: Integrated valve proving system (C1 variant); programmable test period
• Approvals: EN 746-2, EN 676, SIL up to 3, PL e, EU (LVD, EMC, GAR), ANSI/CSA, FM, UL, AGA, EAC

Applications

• Industrial forced draught burners of unlimited capacity
• Direct-ignited and pilot-ignited burner systems
• Intermittent and continuous burner operation
• Applications requiring integrated valve proving (tightness control)
• Installations requiring SIL 2 / SIL 3 safety integrity compliance
• Networked burner management systems via PROFINET or Modbus TCP (with BCM 500)
• Control cabinet installations on DIN rail in industrial combustion plants

BCU 570 Accessories

• BCM 500 – Communication module adding PROFINET or Modbus TCP fieldbus connectivity to the BCU 570
• OCU – External operator control unit for remote burner operation; IP65 rated
• PCO 200 – Opto-adapter for BCSoft parameterization via PC without live mains connection
• PCO 300 – Opto-adapter (alternate version) for BCSoft PC parameterization
• LM + PCC 500 – Load module and process combustion controller accessory for expanded control capability

Documentation