Alarm and monitoring system

The Mega-Guard Alarm and Monitoring System (AMS) is the perfect solution for small vessels.

Features

The Mega-Guard Alarm and Monitoring System (AMS) is the perfect solution for small vessels. The Mega-Guard AMS supports both manned and unmanned machinery space applications.

The Alarm Panel is the main component of the AMS and this panel contains 16 digital inputs with a text window and LED alarm indication. This stand-alone panel communicates with other Alarm Panels and with the Group Alarm Panel on bridge via a redundant Ethernet network. The Group Alarm Panel on bridge is physically the same panel as the Alarm Panel.

The basic AMS can be extended with analog inputs by installing an EAS Operator Panel and one or two 24 channel Analog Input I/O Modules. The EAS Operator Panel is used for alarm indication and measured value indication. The EAS Operator Panel is also equipped with a RS485 serial interface to read values from other equipment.

The Mega-Guard AMS can also be expanded with an Extension Alarm System for unmanned machinery space notation (UMS). In this case the EAS Operator Panel is required for Attended/Unattended selection, on duty selection and patrol timer functions. An EAS 3 LED Panel is installed in cabin's and public spaces in order to call the on duty engineer in case an alarm is coming.


Alarm Panel

The Alarm Panel supports 16 potential free alarm contacts (digital inputs) and 2 alarm inhibition inputs. Alarm Panels are interconnected by a redundant Ethernet network. Ring Ethernet wiring is fully supported by the Mega-Guard AMS. The Alarm Panel is equipped with an Alarm LED for each input channel and an Acknowledge and Stop Horn pushbutton. A text sheet with channel description for each channel is inserted from the top. Background illumination will shine through this text sheet for night visibility of the channel descriptions. Background dimming level can be adjusted in normal operation mode by pressing the Arrow Left and Arrow Right pushbuttons. The Alarm Panel is equipped with a 2 line by 16 character display which displays diagnostic messages during normal operation mode. The display is also used for programming the Alarm Panel during installation.

The programmed data is stored inside the Panel and can be saved or loaded via a USB memory stick. A Lamp Test of the unit can be performed when pressing Ack and Stop Horn at the same time during normal  operation. The Alarm Panel has standard DIN size 144x144mm for flush panel console mounting. The rear of the unit is equipped with detachable terminal strips for field wiring.


Tank gauging and monitoring

The Mega-Guard AMS supports the reading, processing and alarming of analog input channels. Analog input channels are connected to a 24 channel Analog Input I/O Module and virtually all types of analog sensors are supported (4-20mA, PT100, 0-10V, TC, etc). The values can be read out and the alarms are shown on the EAS Operator Panel. The EAS Operator Panel is also capable of making calculations with the analog input channels in order to calculate for instance the contents of a

tank and taking into account the odd tank shape together with the specific gravity of the fluid inside the tank.

Analog input channel configuration (set-up) is supported via the Mega-Guard PAL configuration software which runs on Windows 7 portable computers. The EAS Operator Panel is connected to the portable computer via Ethernet link.


Capacity

The Mega-Guard AMS has the following maximum I/O configuration:

  • 192 digital inputs (12x Alarm Panel).
  • 96 analog inputs (4x 24ch Analog Input I/O Module).
  • 96 serial link inputs.

A maximum of 4x EAS Operator Panels and a maximum of 4x Group Alarm Panels are supported.


Extension Alarm System

The Mega-Guard AMS can be extended with a highly reliable engineer calling system for unmanned machinery space operation (UMS). The EAS functions are executed on an EAS Operator Panel. On duty indication and engine room alarms

are displayed on the EAS 3 LED Panels in accomodation areas. The Extension Alarm System consists of the following components:

  • EAS Operator Panel
    This panel is used for Attended/Unattended selection, on duty selection and patrol timer (dead man timer) functions. The EAS Operator Panel has standard DIN size 144x144mm for flush panel console mounting. Usually the panel is installed in control room console.
  • EAS 3 LED Panels
    These panels are used for On Duty and Engine Room Alarm indication via LED's. An alarm buzzer is integrated as well in the panel. The EAS 3 LED Panel has size 80x80mm for mounting in a standard AC plug socket.
  • Watch Entrance Unit
    This unit is used for Attended/Unattended selection and Patrol Timer On/Off selection (via keyswitch). This unit is applied in case it is not allowed to execute these functions on the EAS Operator Panel. The Watch Entrance Unit is bulkhead mounted near the entrance of the engine room.
  • Timer Reset Units
    This unit is used in order to reset the patrol timer. Timer Reset Units are bulkhead mounted on various locations in engine room.
  • EAS Control Processor
    This unit takes care of the communication in between the EAS 3 LED Panels, Watch Entrance Unit and the Timer Reset Units. The EAS Control Processor is mounted on DIN rail and is installed inside a console; close to the EAS Operator Panel.


Sales and service

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Contact information

Praxis Automation Technology
Zijldijk 24A,
2352 AB Leiderdorp
The Netherlands

+31 (0)71 5255 353
info@praxis-automation.com

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