Sensor Electronics SEC Millenium Series Instruction And Operation Manual page 58

Features
• Dual Sensor Interface Capability
• Explosion Proof
• Back lighted LCD Display
• Low Cost
• Plug-and-Play toxic, oxygen and combustible gas sensors
• Self-Check system
• 4-20 mA output
• RS-485 Interface (Isolated)
• Alarm and fault relays
• Non-intrusive configuration
• Non-intrusive calibration
• Removable, non-volatile, time stamped data logging memory stick
• Optional IS barrier
• Digital communication link to SEC 3000, SEC 5000 and SEC Millenium Gas Detectors
• Multi port housing for easy installation
Applications
Operation / Description
The SEC 3120 provides dual interface capabilities for the SEC 3000 Gas Detector family, SEC Millenium and
SEC 5000 Infrared Gas Detector families.
The SEC 3120 features:
• Dual sensor interfacing to enable like-sensor redundancy or control or dissimilar sensor types
• Back lighted LCD for Gas Level/Unit Parameter display
• Four (4) Alarm/Fault Relays configurable for alarm set points, latching and multi-sensor relay logic
• An isolated RS485 Modbus interface provides reliable communication in noisy environments and
eliminates "Ground Loop" problems
• Three magnetic switches for local configuration and calibration without compromising explosion
proof protections
• Time stamped data logging using a removable non-volatile memory module. Module can be
removed from the unit to allow remote data downloading and data archiving.
An optional IS barrier allows "hot" sensor replacement in rated locations. This allows the user to install
pre-calibrated/pre-configured sensor boards without removing unit power while maintaining EX rating.
Removable circuit board stack and detachable connectors facilitate field-wiring installation.
• Petrochemical Refineries
• CNG Facilities
• Semi-Conductor Industry
• Mining
• Pulp and Paper Mills
• Oil Rig Platforms
• Buildings
• Automotive Industry
• Engine Test Rooms
Digital Gas Transmitter
• LNG & LPG Facilities
• Sewage Industry
• Water Treatment Plants
• Parking Garages
• Chemical Industry
• Nuclear Industry
• Compressors
• Tunnels
• Medical Facilities
SEC 3120
Dual Sensor
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