Safeguard Alarm Controller


The SafeGuard 16 Channel Modbus® Master Display and Alarm Monitor / Controller is designed as a cost-effective mini-system controller alternative to expensive PLC systems. The SafeGuard comes standard with a centralized, easy-to-read LCD providing simultaneous status on 16 channel inputs as well as several expansion options including Mimic Display capabilities and HMI software packages. The SafeGuard can be equipped for any application, indoors or out, with your choice of a basic wallmount, a weather-proof fiberglass enclosure or rack panel mounting.

The SafeGuard Controller is easy to configure and user friendly Measurement ranges in engineering units, adjustable alarm set-points, dual serial interfaces and many other features combine to allow the SafeGuard to satisfy the needs of many demanding applications. It is widely used for centralizing the display and alarm processing functions in critical flame and gas detection applications.

An RS-485 Modbus® slave port allows up to 128 SafeGuard‘s to be multidropped onto a single data highway for interrogation by another Modbus master. SafeGuard’s may also be cascaded by connecting one unit’s master port to another’s slave port. SafeGuard options such as discrete alarm relays per channel or 4–20 mA I/O are added by connecting appropriate 8 channel boards (2 required for more than 8 channels) to the economical I2 C expansion bus. Familiar “telephone style” cables and connectors interface to this bus. Versatile, expandable, and a wide range of system configuration options – satisfying the most demanding user applications.

  • 8 channel display mode and boards allows for economical configuration for smaller systems.
  • Dual Modbus RS-485 serial ports for simultaneous master / slave operation.
  • Alarm Zoning feature available – target specific zones at the same time or entire areas. Relay Acknowledge feature allows silencing of external audible devices during alarm.
  • Graphic LCD readout displays monitored data as trends, bar graphs and engineering units.
  • Standard A SPDT common alarm relays for HORN, HIGH, WARN & FAULT. Optional discrete channel alarm relays also available.
  • Alarm event printer interface, direct sensor inputs, 4-20mA outputs, discrete alarm relays and others supported via an I2C expansion bus.
  • Cal Mode offers pushbutton zero /span calibration.
  • Authorization Mode allows locking of critical configuration variables.
  • Magnetic keypad available for nonintrusive operation in potentially hazardous locations.
  • NEMA 4X enclosure wallmount, basic wallmount and rackmount options available.
Voltage Range: 10 to 30 Vdc
Power Consumption: 12 watts max at 24 Vdc
Display: 128 x 240 pixel graphic LCD with backlight display bar graphs, trends and engineering units. 52 discrete LED’s indicate alarm status for 3 alarms per 16-channels and common relays.
Temperature: -25 °C to +60 °C (-13 °F to +140 °F)
Mounting: NEMA 4X fiberglass Enclosure wallmount, Basic wallmount, 1/2 length 19” inch rackmount
Outputs: Serial Ports — Master and Slave RS-485 half or full duplex ports equipped with Tx / Rx LED’s. Protocol = Modbus® RTU; Analog — 10 bit 4–20 mA output. Max load 800 ohms with normal 24 Vdc power supply; Discrete Alarm Relays — 5 amp 30 Vdc or 250 VAC resistive Form C
Inputs: Compatible with all Net Safety Analog Output Flame and Gas Detectors
Warranty: 2 Years
Price: $0.00
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