MSA 9010 SIL, Руководство по эксплуатации

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Installation
GB
Model 9010/9020 SIL
Detector or Transmitter Connections
If the control unit is supplied with a pre-calibrated option for passive detectors, MSA recommends
to record the serial numbers of individual modules and connected detectors for proper identifica-
tion. The Control Unit 9020 SIL has one serial number for both channels (A and B), so the channel
type needs to be recorded as well.
4-20 mA transmitters can be connected to the control unit depending on its configuration.
The connection of the detector to the control unit must be carried out via shielded cable unless
there are different instructions from MSA.
The number of conductors necessary for connecting the detector, determined during configura-
tion, is indicated on the CALIBRATION DATA SHEET.
Refer to diagrams in chapter 12.6 to get the minimum cable cross wiring section required.
WARNING!
The shielding of the connection cable to the detector must be uniquely connected to the screw or
to the fast-on earth terminal adjacent to the backplane terminal board for connection of the control
unit. It is important that the shielding from the detector side is carefully isolated. It must absolutely
not be connected to the earthing screw that is located inside the detector case. The case must be
connected to earth via a different conductor to be fixed to the screw on the outside of the box.
If it is necessary to install more lengths of cable between the control unit and detector, it is neces-
sary to make the joints via welds; it is recommended to use welding for the wire terminals as well.
WARNING!
In case of operation with catalytic combustion detectors: To guarantee the unambiguity of catalytic
combustion detector operation, it must be made sure (e.g. by checking with hand-held test instru-
ments) each time before turning on the detectors and the system that the environmental atmo-
sphere to be monitored by the detectors does not contain dangerous gas concentrations of
combustible gases.