36 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Signal lines
• Select required conductive material which is appropriate for the length
of the lines and the predictable current load.
• Notes concerning the cable cross-section for connection of the
I/O modules:
• The max. capacity of terminals for stranded wire and solid wire is
1 mm
2
(17 AWG).
• The stranded wire can be tinned on the tip or twisted to simplify the
assembly.
• When using wire end ferrules, the total cross-section may not be
more than 1 mm
2
, i.e. the cross-section of the stranded wire may not
be more than 0.5 mm
2
. The PZ 6/5 crimping tool of Weidmüller & Co.
must be used for crimping the ferrules.
• Max. length of the RS485 leads 1200 m (max. transmission rate 19200
bit/s).
• Max. length of the RS232 leads 15 m.
24V supply to the analyzer modules
Extension cable
• Min. cable cross-section 2.5 mm
2
.
• Max. length 30 m.
Power supply unit
• If 2 analyzer modules are installed in a system housing, a separate power
supply be provided for their power supply. This power supply unit must
comply with the specifications of the AO2000 power supply unit.
Power supply lines
• If the supplied mains lead is not used, select conductive material which
is appropriate for the length of the lines and the predictable current
load.
• Provide a mains isolator or a switched socket-outlet, in order to be able
to disconnect all the power from the gas analyzer if required.
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