• ATEX M1 certified intrinsically safe
• Distributed intelligence for effective plant control and monitoring
• Cost effective solution minimises hardware and cable costs
• Units can be up to 500 metres apart enabling the intelligence to be distributed
• Extremely flexible to allow a wide range of applications
• Expandable to suit future changes
• The PLC ladder logic software is user programmable
• Modules can be reprogrammed on site

The intrinsically safe ATEX M1 certified MineWATCH PC 21 system comprises a range of modules which can be linked together via CAN bus data links to provide a modular system for environmental monitoring and mine plant monitoring and control applications.  One of the modules has a long range telemetry link to enable computer based remote control and monitoring via a data link for SCADA applications.

Data Links

The MineWATCH PC 21 system includes a range of modules which can be interconnected for a large number of applications via either a high speed cluster CAN bus data link allowing up to eight modules to be connected to form a cluster, or a low speed CAN bridge data link for long range networking which allows up to eight clusters to be connected.

The MineWATCH PC 21 modules

There are three types of MineWATCH PC 21 module which can be interconnected in a variety of ways.  The three MineWATCH PC 21 modules are:

	PC 21-1 Control module - intrinsically safe interface to mine plant and machinery.
	PC 21-2D Display module - provides the user interface; it is equipped with an LCD display and a keypad.
	PC 21-2T Transmission module - an intrinsically safe barrier and telemetry modem to provide a long range telemetry link to a SCADA system.  It is capable of operating over distances of up to 10km.

Module Programming

Each module has three programs, the master boot program, the operating system and the application program, this application  program is programmed using ladder logic which can be modified by the user.  A programming package comprising computer software, a manual and a programming unit is available from Davis Derby.  New or modified application programs are written using the PC software, the completed software is down loaded to a Memory Module via a Memory Module programming unit.  This module is then temporally plugged in to the installed PC 21 modules to reprogram them. The programming module can then be removed and stored for future use.

MineWATCH Module Packaging

The MineWATCH PC 21 modules described on the site can be connected together to form a cluster as shown.  Modules can be installed into purpose-designed enclosures for specific applications.  Further details of these units is provided in the PC 21 Control and Monitoring Units section.  The PC 21 modules can also be installed  in control centres and other equipment produced by other manufacturers.

Typical MineWATCH PC21 Module Cluster

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