Vega VEGAMET 141, Safety Instructions

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9 VEGAMET 141, 142
63696-EN-210721
Ex ia IIC, Grp A, B IIB, Grp C or
IIIC, Grp E,
F, G
IIA, Grp D
Max. permissible external inductance L
o
/L
a
2.94 mH 11.76 mH 23.6 mH
Max. permissible external capacitance C
o
/C
a
136 nF 1000 nF 3600 nF
Notes:
1. The Intrinsic Safety Entity concept allows the interconnection of two intrinsically safe devices,
cULus certified with entity parameters, not specifically examined in combination as a system when:
Uo or Voc or Vt ≤ Vmax; Io or Isc or It ≤ Imax; Po ≤ Pi; Ca or Co ≥ Ci + Ccable; La or Lo ≥ Li + Lcable
2. Control equipment connected to the Associated Apparatus shall not use or generate more than
250 Vrms or Vdc with respect to earth.
3. Installation shall be in accordance with ANSI/ISA-RP12.06.01 “Intrinsic Safety Wiring Methods for
Hazardous (Classified) Locations Instrumentation” and the Canadian Electrical Code for Canada or
the National Electrical Code for the US or other local codes, as applicable.
4. Capacitance and inductance of the field wiring from the intrinsically safe equipment to the barrier
shall be calculated and has to be included in the system calculations. Cable capacitance (Ccable)
plus intrinsically safe equipment capacitance (Ci) must be less than the marked capacitance (Ca)
shown on any barrier used. The same applies for inductance (Lc, Li and La, respectively). Where the
cable capacitance and inductance per foot are not known, the following values shall be used for two
or three core cables: Ccable = 60 pF/ft, Lcable = 0.2 uH/ft.
5. Associated apparatus must be installed in an enclosure suitable for the application in accordance
with the National Electrical Code (ANSI/NFPA 70) for installation in the US, the Canadian Electrical
Code for installations in Canada, or other local codes, as applicable.
6. The configuration of Field device must be cULus/FM/CSA listed under Entity Concept
7. Field sensors/device manufacturer´s installation drawing shall be followed when installing this
equipment
8. No revision to drawing without prior Approval by UL.
9. The installer must ensure that the rated ambient temperature range of the equipment is not
exceeded when installed in an enclosure with other equipment and that sufficient separation is
provided around the device.
10. The installation orientation of the device must be in accordance with the instructions.
11. Live maintenance is not permitted.
12. The HART1 and HART2 service sockets are directly connected to the intrinsically safe output
terminals (1, 2 and 4, 5). The intrinsic safety of the combination of intrinsically safe HART commu -
nicator (e.g. VEGACONNECT) and connected intrinsically safe device must be evaluated as part of
the system design.
c-UL-us