301-EM-US3

The Honeywell 301-EM-US3 is a dedicated gas detection expansion module suited for various industrial safety applications. This unit operates at a voltage rating between 22 Vac to 27 Vac and 29 Vdc to 38 Vdc. The module has a weight of 2.26 lbs, ensuring it is light while maintaining high-duty functionality. It allows for input voltage frequencies of 50/60 Hz, accommodating standard electrical environments.

In terms of power requirements, the current rating at 29 Vdc stands at 2 A, providing robust performance in real-time monitoring of gas concentrations. The ambient operating temperature can range from 0°C to +40°C, making it suitable for variable environments. Furthermore, the unit supports humidity conditions of 0 to 95% RH, ensuring it can handle moist atmospheres without condensation. With the ability to be installed at altitudes of up to 3000 meters, this module is versatile and can adapt to various setups.

Housed in a NEMA 4X ABS-Polycarbonate enclosure, the device is designed to endure challenging conditions, including dust and moisture. Standard outputs feature four double pole double throw (DPDT) relays and three outputs rated for 24 Vdc at 250 mA each. An optional feature allows for 4-20 mA per sensor, enabling connection of up to four direct-wired and a total of twenty sensors when necessary. Communication options include RS-485, Modbus, or Vulbus protocols, facilitating easy integration with existing systems.

This expansion module boasts relay outputs rated for 5 Amps at either 30 Vdc or 250 Vac with a resistive load, providing flexibility in interfacing with connected systems. Users can monitor status via a backlit LCD and receive alerts through an audible alarm producing 65 dBA at a range of 1 meter (3 feet). Overall, the 301-EM-US3 expansion module is specifically crafted to enhance gas detection systems through robust construction and adaptable configurations.