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116
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Connecting the signal lines
NOTES
Follow local regulations on installing and connecting electrical wiring.
Lay the signal lines separately from the power supply lines.
Lay analog and digital signal lines separately from each other.
Mark the cables or mating plugs in such a way that they can be clearly as-
signed to the corresponding I/O modules.
Requisite material
•
Select 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). Cable type: 3-core twisted-pair cable, cable cross-section
0.25 mm
2
(e.g. Thomas & Betts, Type LiYCY).
•
Max. length of the RS232 leads 15 m.
•
The mating plugs (socket housing) for the plug-in terminal strips on the
I/O modules are supplied.
Connection box
In the IP54 version of the system housing, the back of the electronics module
is protected with a connection box.
The connection box has:
•
EN version: Five M20 and two M32 threaded cable connections
•
CSA version: One 1¼-inch and two ¾-inch conduits.
Two M32 threaded cable connections are provided to route system bus,
Modbus, Profibus and Ethernet cables.
Protective cap
A protective cap is factory-installed on the rear of the electronics module
when the Limas21 UV analyzer module is installed in the central unit.
NOTE
It is imperative to re-install the protective cap after connection of the elec-
trical lines. Otherwise light penetration during operation may lead to erro-
neous measurement values and measurement range overflows.