301-EM-US3 | Honeywell Analytics | Gas & Specialty Sensors
EXPANSION MODULE 4 RELAYS 4 4-20MA OUT
Brand:Honeywell Analytics
MPN:301-EM-US3
SKU:301-EM-US3
product specifications
Application
Refrigeration, Laboratory, Transportation, Cold Storage, Pharma, Medical, Agriculture
Measurement Range
0 - 1,000 ppm
Display
Yes
Output Signal
Current
product series specifications
Supply Voltage: 22-27 VAC @ 48 VA, 50/60 Hz or 22-38 VDC @ 2 A max.
Accuracy: ±40 ppm @ 500 ppm
Signal Output: 4-20mA, 1000? @ 24 vdc each sensor
Communication: RS-485, Modbus
Measurement Range:
CO: 0-250 ppm
NO2: 0-10 ppm
Refrigerants: 0-1000 ppm
Sensing Technology:
CO: Electrochemical
Refrigerants: Dual Infrared Sensor
Distance To Transmitters: Up to 500 feet (160 m), 200 ft (60.9m) maximum
Calibration Interval: 6 months
Visual Indication:
Green - Normal
Red - Alarms A, B, & C
Yellow - Fault/Service Alarm
Amber - Tx (network mode)
Display: Backlit LCD
Response Time: 60 seconds
Relay Output: 4 DPDT relays (20 ppm diff), (4) 5A, 30 VDC or 250 VAC (resistive)
Alarm Auditory Levels Db: 65 dBA @ 3 ft (1m) internal
Gases Detected: CO, NO2, R11, R12, R123, R125, R134A, R22
Operating Temperature:
301RF, EM: 32° to 100°F (0 to 40°C)
S301: -40° to 104°F (-40 to 40°C)
Operating Humidity: 0% to 95% RH (noncondensing)
Enclosure Rating: NEMA 1
Dimensions:
301EM(controller): 7.99"H x 11.02"W x 2.76"D (20.3 x 28 x 7 cm)
301RF(sensor): 4.02"H x 11.02"W x 2.48"D (10.2 x 28 x 6.3 cm)
S301(sensor): 3"H x 2" Diameter (7.6 x 5.1 cm)
Weight:
301EM : 3.1 lb (1.4 Kg)
301RF: 2.3 lb (1.0 Kg)
S301: 2.0 lb (0.9 Kg)
Approvals: CSA
Warranty: 1 year
product series features
- Sense one to twenty zones
- Sensors available for toxic and combustible gases and refrigerants
- RS-485 Modbus communication
- Contact input for manual break-glass switches
- Three 24VDC outputs to activate strobes and horns
- 4-20mA output for each sensor
- Four relay outputs
- Easy-to-read LCD display
- Explosionproof sensors for combustible and toxic gases
- Additional gases availible
- Programmable relay differential
more information & related documents
Series Description
The Honeywell Analytics 301EM Series Gas Detection Expansion Module allows the monitoring of toxic and combustible gases and refrigerants. Up to four sensors can be placed 500 ft. away for toxic and combustible gases, and 200 ft. away for refrigerant gas monitoring. The transmitter is equipped with a backlit LCD display and keypad that can be placed in a safe area, remote from the sensors. Alarm relays and Modbus communication are standard. The unit is compatible with the 301C controller.
Kele Description
EXPANSION MODULE 4 RELAYS 4 4-20MA OUT
Manufacturer
Honeywell Analytics
S301 Calibration Handbook 
