Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 237)

Blatt 8 von 7
940515230000-460
Sicherheitshinweise/
Safety instructions
26.11.2010
Klausgrete
Zeichnungs-Nr.
Benennung
Revision 03
11. The Transmitter and metal parts (load cells / weighing platforms) must be connected to potential
equalsiation (PE) (9). This means that the transmitter and the load cells / weighing platforms must
be connected, with low resistance, to the same PE (9). All connected non intrinsic safe devices with
Um = 250V must also be connected to PE (9). This PE (9) must be connected to the PE (9) from the
Ex-Area with low resistance. For this purpose, the user has to connect a conductor with a cross-
section of at least 4mm² at suitable points. Fitting parts like screws can be used. If a flexible
conductor is used, it must has a ring eye, for a save mounting. The installation must be save,
against self loosening. Check this connection to the PE-rail to be of low resistance, during on-side
installation and periodical time lag afterwards. Prevention against electrostatic charging is under the
responsibility of the customer.
12. Before opening the instrument, switch off the supply voltage, or make sure that the area is not
potentially explosive. Do not connect or disconnect any live calbes inside the hazardous area!
13. The influence of stray electrical interferences (e.g. due to magnetic fields) must be avoided by
means of proper installation.
14. Chemicals that can attack housing gaskets and cable sheathings must be kept away from the
instrument. These includes oil, herbal and animalistic grease, petrol, chlorinated and flavoured
solvent, base and acid, acetone and ozone. If you are uncertain, contact the manufacturer.
15. Data cable to the connected devices and cable to the load cells are not sparking circuits. The
connections are secured against unintended disconnection. Connect or disconnect only when
power is switched off. Not used outputs must be closed according IP65. Keep voltage transients
away from the device.
16. Use only data outputs (2), supplied by Sartorius for the PR5230. This options must be installed
correctly (secure against self loosening) and must be connected with the mainboard according to
the instructions.
17. Relais: With Option Y2, only external circuits (14) with voltages up to 60Vac or 75Vdc are allowed
to be connected to the relais.
18. Option W1 (5): Connected load cells or weighing platforms (11) must be certified for use in Ex
areas Zone 2 or Zone 22 and for load cell supply voltages of more than 13,2V. Observe gas group
and temperature class when use in Ex area Zone 2. When use in Zone 22, observe the allowed
surface temperature.
19. Option WE1: In this case the Transmitter PR5230 (intrinsic safe output to load cells / weighing
platforms) will be delivered, so that the intrinsic circuit ( Connector X100 from the Analogboard or
the connectors X101 ...X104 from the wiringboard, if exist) is connected to PE.
If it is necessary to use an potential free output, it is possible to open the Jumper J250. Cut both
ends from the Jumper short over the PCB surface, so that the distance between the ends is > 2mm
and there is no connection to any other potential.
If J250 is open, the intrinsic circuit is galvanically separated from the housing (PE) (500V test
voltage).