SEC 3120 Digital Gas Transmitter Dual Sensor
The following specifications are for the SEC3120 display only. Consult the appropriate sensor manuals for their specifications.
For use up to two (two of below):
- SEC 3000 Toxic Gas Detector
- SEC Millenium IR Combustible Gas Detector
- SEC 5000 IREvolution IR Gas Detector
Environmental:
The SEC3120 Dual Sensor Display can be installed in indoor, outdoor and wet locations. The housings have ingress protection ratings of IP66. Pollution degree 2 and Overvoltage category II
Operating Temperature and Humidity Rating:
-40° to +40°C (-40 to +104° F) when equipped with the optional LCD heater
0° to +40°C (32° to +104°F) when not equipped with the LCD heater.
The unit will operate below this temperature, but at a reduced function, specifically the LCD may become illegible or damaged.
0 to 99% RH (non-condensing)
Altitude / Elevation:
IEC 61010-1 certified to 2000 meters.
Mechanical:
Construction:
Epoxy Coated Aluminum
Dimensions: (See drawing 3120-XXX for details)
Height: 5 Inches (128 mm) Width: 5 inches (128 mm)
Depth: 4.8 inches (122 mm) Weight: 4.55 lbs (2.0 kg)
C
onduit Entry:
Three (3) 3/4 inch NPT
For hazardous location installations seals must be installed within 18 inches of conduit entries.
Electrical:
Mains Supply (Operating Voltage):
24VDC Nominal (Range 18-32 VDC) measured at the detector head
Current Draw: (without sensors)
Average: 250 mA (Peak: 500 mA)
Input, Sensor (Digital):
0-5 V, Sensor Electronics Corp. (SEC) Proprietary, Single-Wire, Digital signal from the sensor.
This signal is used by the sensor to communicate status and gas data and is used by the display to initiate sensor calibration and query status.
Output (Analog):
4-20 mA (Source Type), max 1000 ohm load at 24 Vdc supply voltage.
The 4-20 mA output is provided by the sensor and is passed through the SEC3120 display. The display can be located at any point in the sensor’s output loop. Consult the appropriate sensor manual for 4-20 installation requirements.
Output (Digital):
RS485 LAN (isolated) MODBUS RTU Slave, compatible with Modicon Modbus Specification PI-MBUS-300 Rev. J. Refer to SEC Modbus Technical Sheet (SEC P/N 1580282) for specific configuration and use information.
Output (Relays):
Three (3) Alarms: Low, Mid, High. One (1) Fault
Rated for 8 Amps, 30 VDC or 120VAC
Approvals:
CSA/NRTL Class 1, Div. 1, Groups B,C,D T5
IECEx: Ex d IIC T5 Gb
UL 2075 (Must be used with UL2075 Approved SEC Millenium)
SEC 3120 DIN Controller Specifications:
Detection Method: Power Consumption (SEC3120 & Sensor):
Toxic Gases – Electrochemical Toxic Gases and oxygen (SEC 3000) – 4W Max
Combustible - Infrared Combustible & CO2 (SEC Millenium) – 9W Max
Gas Sensor Compatibility Temperature Rating
SEC 3000, SEC Millenium -40° to + 40°C
SEC 5000 IREvolution
Output (digital) Humidity
RS-485 LAN (Isolated) 0-99% RH (Non-condensing)
Outputs (Two analog) RFI
4-20 mA (source type) max. 1000 ohm load Built in filters reject RFI/EMI
at 24 VDC supply voltage
Output (optional relays) Housing Construction
(3) Alarm and (1) Fault ABS Plastic (Enclosure color gray)
Display Certification
Back Lighted LCD CSA/NRTL
LEDs for relay indication
Operating Voltage Housing Dimensions
18-32 VDC
3.54 (W) x 4.17 (L) x 2.28 (H) inches
{90 (W) x 106 (L) x 58 (H) mm}
Operating Current (No Sensor) Weight
125mA Max @ 24VDC Approximately 2 lbs. {0.9 Kg.}
