MSA SUPREMATouch MCP 20, Руководство по эксплуатации

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System Concept
GB
SUPREMATouch
2.2 Design
The modules of the SUPREMATouch are mounted in a rack. For expanded systems, additional
modules can be placed in a second rack or installed on top hat rails in a switch box.
Data is exchanged between the modules over a CAN bus, so it is possible to connect satellites
over long distances.
For measurement tasks that require redundant signal input and processing, additional modules
can be added at any time to expand the gas warning system.
The sensors must have the type of protection against ignition prescribed for the installation site.
The connection between the input module of the SUPREMATouch and the sensors is established
by a screened remote-measurement cable of the 2, 3, 4 or 5 wire type.
For servicing, the sensors can be electrically isolated from the SUPREMATouch by mechanically
disconnecting the plug-in connection (MAT, MAT TS modules).
The following block circuit diagram shows the possible layout of a non-redundant system.
Sensors
The system distinguishes between passive detectors and active transmitters.
As a general rule, passive detectors simply consist of a highly sensitive (half) measuring bridge
while active transmitters possess their own electronics and have a standardised signal output
(4–20 mA).