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View and design
Page 8
gas-lab
Q1
Most of the connection possibilities are located on the back of the device. The
following interfaces are always available:
fibre-optics connection for the sensor system
DSfG bus connection
COM2 interface: serial interface according to RS232. In case of devices
with an integrated RDT, the modem is connected to COM2. A different
software variant offers gateway functionality for interfacing a host protocol
instead. In this case, the COM2 interface can be used as protocol channel.
DCF77 interface for connecting a radio clock
24 V DC power supply connection
HSB bus connection (not used)
All process connections are implemented via process boards installed in the
housing. The exact composition of the I/O boards depends on the tasks of each
individual device (number of required output signals, etc.).
The name of the software variant, the version’s number and the checksum for
the identification of the software version can be invoked directly at the device via
the main display of the
System
module.
The main functionality of the Q1 is measuring the gas quality. The sensor
system is connected via an LMFA1-type process board, which provides 3 digital
and 4 analogue outputs in addition to the fibre-optics connection for the sensor
system.
Furthermore, the following boards can be used:
A multi-functional EXMFE4 input board for the connection of a pressure and
a temperature sensor (PT100) and two digital inputs (NAMUR). All channels
are intrinsically safe (EX-i).
An MSER2 board with 2 serial channels (RS232, RS422 or RS485) for
interfacing communication protocols (e.g. MODBUS).
An MFE11 input board with 8 digital and 3 analogue inputs.
An MFA6 output board with 4 digital and 2 analogue outputs.