Beacon 410A


The Beacon 410A is a highly configurable, microprocessor-based, flexible and easy to use 4 channel gas monitoring controller. It simultaneously displays the gas type, readings, and status for four channels of gas detection. It can monitor any combination of direct connect sensors (LEL, O2, CO2, and toxic gas sensors), as well as any 4-20mA transmitter.

Each channel has up to three fully configurable alarm points. A built-in silenceable audible alarm alerts you to alarm conditions. Each channel also has two dedicated fully configurable relays and there is a bank of common relays as well. The common relays can optionally be configured as additional relays allowing up to 3 alarm relays per channel. Each channel provides a 4-20mA output signal. A digital Modbus interface for remote logging of data via a Modbus network is standard. A Min-Max feature retains high & low peak readings for review at any time.

A fully configurable, high visibility strobe is available as an option. The unit can be powered from 115/220 VAC, or an external 24 VDC source. A trickle charging battery backup feature with battery assembly is also available as an option.

All features and functions of the Beacon 410A are controlled by easy to use menus on the OLED display. All features including form-C relay contacts of the Beacon 410A are built into the unit so you never need to purchase or maintain any “add-on” cards or components.


Simultaneously control up to 4 gas monitoring channels
OLED display of all 4 channels
LEL / O2 / CO2 / toxic direct connect sensors
Accepts any 4-20 mA transmitter, 2 or 3 wire
Up to 3 programmable alarm levels per channel
Up to 3 configurable alarm relays per channel
4-20 mA analog & Modbus digital output standard
115 / 220 VAC or 24 VDC operation
Audible alarm with silence feature
RFI / EMI Resistant
Alarm reset switch
Built in trouble alarm with relay
Weather and corrosion resistant NEMA 4X enclosure


Petrochemical plants
Water & wastewater treatment pants
Pulp & paper mills
Gas, telephone, & electric utilities
Parking garages
Manufacturing facilities



General Specifications

DimensionsHeight: 12.5” Width 11” Depth 6.4”
EnclosureNEMA 4X non-metallic for indoor and outdoor locations
Conduit Connection3/4” NPT conduit hubs, 4 provided, for sensor, power, & relay wiring
Wiring TerminationScrew type terminal block, 14 gauge max
Power115 VAC & 220 VAC, or 24 VDC nominal, battery backup option available
ControlsDisplay PCB Control Switches: UP/YES push button switch DOWN/NO push button switch ESCAPE push button switch ENTER push button switch External reset switch On/Off toggle switch
Operating Environment
Operating Temperature-4°F to 122°F (-20°C to 50°C)
Storage Temperature-4°F to 158°F (-20°C to 70°C)
Relative Humidity0 – 95% RH (non-condensing)
Enclosure RatingNEMA-4X enclosure, chemical and weather resistant
Direct Wired SensorsLEL, Oxygen, Carbon Monoxide, Hydrogen Sulfide, and Carbon Dioxide. Remote amp not required for less than 500 feet
4-20 mA SensorsAccepts any 4-20 mA transmitter (24 VDC, 2 or 3 wire). A wide variety of RKI/Riken sensors are available with 4-20 mA signals. Wiring distances up to 8,000 feet
Sampling MethodsDiffusion and sample draw heads available
RelaysTwo flexible, programmable Form-C (C, NO, NC) relays per channel, plus five common relays (Fail, Alarm-1, Alarm-2, Alarm-3, Alarm-Any). Common relays may optionally be assigned to function as additional channel alarm relays, providing for up to three alarm relays per channel. 10A contact rating.
4-20 mASignal output, 4-20 mA (maximum load impedance 500 ohms), per channel
RS-485Modbus format RS-485 serial output of all channel data, including gas reading and alarm status.
DisplayFour line OLED display
AudibleBuilt-in audible alarm, 94 dB, mounted on enclosure Coded output: pulsing = gas alarm, steady = fail
Visual1. Alarm LEDs (on Display PCB) Alarm 1, yellow Alarm 2, orange Alarm 3, red Fail, yellow 2. Green Pilot LED to indicate AC power connected (on Display PCB) 3. An optional 24 VDC NEMA 4X strobe mounted to top of case.
Approvals and Warranty
WarrantyOne year material and workmanship

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