Gas Connections; Electrical Connections; Electric Supply; Signal Inputs And Outputs - Bühler technologies BÜNOx 2+ Guía Rápida

BÜNOx 2+
gas sampling point, sample gas conditioning, as well as care-
ful installation are just as crucial to the success of a measure-
ment as the converter and the analysis instrument.
Therefore please consult our Customer Service Department
regarding your measuring task. They will recommend an ad-
apted sample gas conditioning.
One should generally note the BÜNOx 2+ converter is inten-
ded for "cold gas conversion". The inlet dew point of the
sample gas therefore must not exceed 10 °C. The unit must
further have a suitable upstream particle filter to prevent con-
taminating the reactor cartridge.

4.3 Gas connections

DANGER
Toxic, corrosive gases
The measuring gas led through the equipment can be hazard-
ous when breathing or touching it.
a) Check tightness of the measuring system before putting
it into operation.
b) Take care that harmful gases are exhausted to a save
place.
c) Before maintenance turn off the gas supply and make
sure that it cannot be turned on unintentionally.
d) Protect yourself during maintenance against toxic / cor-
rosive gases. Use suitable protective equipment.
When connecting gas lines to the unit, please note:
• The connected must be made by a qualified professional.
• Suitable sample gas conditioning is required upstream
from the unit.
The sample gas inlet and outlet are located at the back of the
BÜNOx converter.
The sample gas lines must be carefully and properly connec-
ted via the available fittings (for connecting a hose with 4 mm
inside diameter). For the approved sample gas volume flow
rate please refer to the technical data in the appendix.

4.4 Electrical connections

4.4.1 Electric supply

DANGER
Electric voltage
Risk of electric shock
a) The unit must be connected by trained, expert personnel.
b) Disconnect all poles of the unit from the mains prior to
installation.
c) Secure the system from accidental restarting.
d) Ensure the correct supply voltage.
e) Only use the included power cord or a power cord with
the specifications indicated.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
BX550019 ◦ 02/2020
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the
device as a whole!
The BÜNOx converter features a DIN 43650 plug for power
supply. The pin assignments are listed below. The numbers
specified correspond with those on the plugs.
The supply voltage is 230 V AC, 50/60 Hz or 115 V AC, 50/60 Hz
(see type plate). Select a connection cable with a wire cross-
section suitable for the load of the unit (see chapter Technical
Data).
pin assignment
Fig. 1: Electric supply BÜNOx 2+

4.4.2 Signal inputs and outputs

The connection must be made by a trained professional.
Please observe the local laws.
Be sure to observe the limits specified in the technical data.
The plug for the input and output signals is located at the
back of the unit. The following image shows the assignment:
Plug Ter-
minal
X1 X1.1 ...
X1.3
X1.4...
X1.6
X1.7...
X1.9
X1.10...
X1.12
X2
X3
X3.1
X3.2
X3.3
X3.4
X3.5
X3.6
X3.7
X3.8
power supply
Relay Description
Rel. 1 Operating mode status
conversion / bypass
Rel. 2 Status: Excess/low
temperature alarm
Rel. 3 Status: Service alert
Rel. 4 Option
reserved
PE / cable shield
External solenoid valve
switchover
(potential-free)
N/C
PE / cable shield
+; analogue output
-; analogue output
N/C
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