The PolyGard 2 Multi-Gas Controller MGC2-K is designed for detection of toxic, combustible, or dangerous gases in many commercial and industrial applications. Three analog sensors with a 4–20 mA signal and eight digital sensors via RS485 communication from Sensepoint XCL and XRL sensors can be connected to the controller, which helps to reduce installation costs.

Key Features

• Internal function monitoring with integrated hardware watchdog
• Hardware and software according to SIL2-compliant development process
• Reverse-polarity protected; overload and short-circuit proof
• Three analog inputs 4–20 mA
• Three relays with change-over contact, potential-free max. 250V AC, 5 A
• Two transistor outputs, 24V DC, 0.1 A (plus switching)
• Serial RS-485 interface with Modbus protocol
• Display with multicolor power LED

The controller monitors the measured values and activates the alarm relays if the set local alarm thresholds for pre-alarm and main alert have been exceeded or if there are alarm messages coming from the eight digital sensors.The controller includes the Honeywell Modbus Master Protocol available exclusively for Honeywell Sensepoint XCL and XRL gas leak detectors.