The 301EM Expansion Module acts as a controller for up to four remote refrigerant sensors and suits a variety of gas detection system solutions.

Easily configured to meet ASHRAE 15, B-52 and International Mechanical Code requirements, the 301EM is commonly used to optimise gas detection in mechanical and chiller rooms.

A full complement of sensors (including toxic, Oxygen, combustible gases and a full line of refrigerant sensors), horns, strobes and remote panels provide added flexibility to suit a variety of gas detection system solutions.

ASHRAE No 15-2001 Mechanical Standard and B-52 Code Compliance
The ASHRAE and B-52 security standards have been established to minimise risk and protect the safety of mechanical room personnel and the environment at large. Available in a special configuration, the 301EM mechanical room controller has been carefully designed to meet and even exceed these rigorous standards. The Vulcain 301EM can be configured to offer automatic fan, horn and strobe activation in addition to manual fan activation. Latching relay for manual alarm recognition, silence key for manual horn deactivation, built-in 24 Vdc outputs for horn operation, and 2 breakglass switch accessories for manual alarm activation ensure optimal performance.

Features & Benefits Accessories Technical Library Image Gallery

User Friendly
•  Easy to read LCD display
•  Auto-diagnostic capabilities


Economical Solution
•  Cost-effective answer for installation in hazardous locations


Flexible Operation
•  Able to operate with up to four remote sensors at a time
•  Various sensors available to simultaneously detect a range of different gases
•  Robust and reliable RS-485 Modbus communication


Output Adaptability
•  Three 24 Vdc alarm outputs and four 4-20 mA outputs


Safety Measures
•  Four fully programmable relays
•  Three alarm levels with built-in visual indicators and audible alarm


Beneficial Options
•  Convenient stand-alone or network operation

No accessories available.
Public Documents
Date Title Type File Size
20 Aug 13 301EM Bilingual Manual Manual / Supplement 1,926 kb
29 Oct 09 Gas Book Americas Gas Book 5,365 kb
09 Feb 11 301EM20 Brochure 374 kb
09 Feb 11 301EM20 spec sheet Datasheet 174 kb
22 Feb 11 Mechanical Equipment Rooms brochure 2,056 kb
20 Aug 13 301EM Wiring Details Manual / Supplement 316 kb
02 Oct 12 301IRFS Specifications Datasheet 160 kb
02 Oct 12 301EMRP & 301EMRP20 Specifications Datasheet 175 kb
02 Nov 12 301EM Submittal Datasheet 1,294 kb
02 Nov 12 301EMRP Submittal Datasheet 1,024 kb
20 Aug 13 301EMRP User Manual Manual / Supplement 1,112 kb
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 Gas Detection Explained

 Honeywell Corporation

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