Parameters:

• Gas Types: Up to four different gas types can be monitored simultaneously
• Detection Range: Dependent on gas type, typically 0-250 ppm for CO, 0-50 ppm for H2S, 0-10 ppm for NO2, 0-25% vol. for O2, 0-100% LEL for CH4 and C3H8
• Alarm Levels: Two configurable alarm levels (Alarm A and Alarm B) per gas channel
• Output Relays: Four DPDT output relays with 5A @ 250Vac or 5A @ 30Vdc switching capacity
• Communication: 4-20mA analog output for each gas concentration, RS-485 Modbus communication
• Power Supply: 24 VDC or 120 VAC
• Power Consumption: Approximately 25 W
• Operating Temperature: -40°C to +50°C (-40°F to +122°F)
• Storage Temperature: -40°C to +70°C (-40°F to +158°F)
• Humidity: 5% to 95% RH non-condensing
• Vibration: 0.5 g RMS, 5 to 500 Hz
• Shock: 5 g, 22 ms half-sine pulse
• EMC: Meets IEC 61000-4-2, IEC 61000-4-3, and IEC 61000-4-6 standards
• Safety: Meets UL 61010-1, CSA C22.2 No. 61010-1, FCC part 15, ICES-003 issue 4, and ISO 9001-2008 certifications
• 

Specifications:

• Multi-Channel Gas Detection Controller: Monitors up to four different gas hazards simultaneously
• Catalytic or Electrochemical Sensors: Utilizes catalytic or electrochemical sensors for reliable gas detection
• Two-Stage Alarm System per Channel: Provides early warning and critical event notification for each gas
• Versatile Output Relays: Enables control of alarms, ventilation systems, and other safety devices
• Continuous Monitoring and Communication: Offers 4-20mA analog output for real-time gas concentration monitoring and RS-485 Modbus communication for data integration
• Rugged Construction: Withstands harsh environments and extreme temperatures
• Safety Certifications: Meets industry safety standards for hazardous environments

Dimensions:

• Height: 140 mm (5.51 in)
• Width: 330 mm (12.99 in)
• Depth: 64 mm (2.52 in)

Weight:

• Approximately 2.0 kg (4.41 lb)

Series:

• Honeywell System 57

Features:

• Comprehensive gas detection: Monitors up to four different gas hazards simultaneously, ensuring comprehensive safety coverage
• Reliable sensor technology: Utilizes proven catalytic or electrochemical sensors for accurate and dependable gas detection
• Granular alarm system: Provides two configurable alarm levels (Alarm A and Alarm B) per gas channel, enabling tailored responses to varying gas concentrations
• Flexible output control: Offers DPDT output relays for controlling alarms, ventilation systems, and other safety devices, ensuring prompt action in case of gas hazards
• Advanced communication capabilities: Supports 4-20mA analog output for continuous gas concentration monitoring and RS-485 Modbus communication for integration with building management systems or data loggers
• Durable construction: Withstands harsh environments and extreme temperatures, making it suitable for various industrial applications
• Safety certifications: Meets industry safety standards for hazardous environments, ensuring compliance with regulatory requirements

Function:

The Honeywell 05704-A-0145 multi-channel gas detection controller plays a critical role in safeguarding personnel and preventing hazardous situations in industrial and commercial settings. It effectively monitors up to four different gas hazards simultaneously, providing comprehensive protection against a wide range of potential threats.

The controller’s catalytic or electrochemical sensors ensure reliable gas detection, accurately identifying the presence of each monitored gas. Its two-stage alarm system per channel provides early warning (Alarm A) and critical event notification (Alarm B) for each gas, enabling timely intervention and evacuation procedures.

DPDT output relays offer versatility in controlling alarms, ventilation systems, and other safety devices, ensuring prompt response to potential gas hazards. The 4-20