PR electronics 9116 Manuel De Produit page 47

LERBAKKEN 10, 8410 ROENDE DENMARK
Installation notes 9116Bx-U9:
Associated Equipment /Appareillage Associé [Ex ia]
The Ex output current of this associated apparatus is limited by a resistor such that the output voltage-
current plot is a straight line drawn between open-circuit voltage and short-circuit current.
Selected intrinsically safe equipment must be third party listed as intrinsically safe for the application, and
have intrinsically safe entity parameters conforming with Table 1 below.
TABLE 1:
I.S. Equipment
V max (or Ui) ≥
I max (or Ii) ≥
P max, Pi ≥
Ci + Ccable ≤
Li + Lcable ≤
The module may also be connected to a simple apparatus as defined in Article 504.2
and installed and temperature classified in accordance with Article 504.10(D) of the National Electrical
Code (ANSI/NFPA 70), or other local codes, as applicable.
Capacitance and inductance of the field wiring from the intrinsically safe equipment to the associated
apparatus shall be calculated and must be included in the system calculations as shown in Table 1. Cable
capacitance, Ccable, plus intrinsically safe equipment capacitance, Ci must be less than the marked
capacitance, Ca (or Co), shown on any associated apparatus used. The same applies for inductance
(Lcable, Li and La or Lo, respectively). Where the cable capacitance and inductance per foot are not known,
the following values shall be used: Ccable = 60 pF/ft., Lcable = 0.2 μH/ft.
Where multiple circuits extend from the same piece of associated apparatus, they must be installed in
separate cables or in one cable having suitable insulation. Refer to Article 504.30(B) of the National
Electrical Code (ANSI/NFPA 70) and Instrument Society of America Recommended Practice ISA
RP12.06 for installing intrinsically safe equipment.
Intrinsically safe circuits must be wired and separated in accordance with Article 504.20 of the
National Electrical Code (ANSI/NFPA 70) or other local codes, as applicable.
The module has not been evaluated for use in combination with another associated apparatus.
Terminals 41-44 are internally connected to terminals 51-54.
There are no serviceable parts in the equipment and no component substitution is permitted.
For installations in which both the Ci and Li of the intrinsically safe apparatus exceeds 1% of the
Ca (or Co) and La (or Lo) parameters of the associated apparatus (excluding the cable), then 50% of Ca
(or Co) and La (or Lo) parameters are applicable and shall not be exceeded. The reduced capacitance shall
not be greater than 1 μF for Groups C and/or D, and 600 nF for Groups A and B. The values of Ca (or Co)
and La (or Lo) determined by this method shall not be exceeded by the sum of all of Ci plus cable
capacitances and the sum of all of the Li plus cable inductances in the circuit respectively.
Revision date:
2019-11-26
Associated Apparatus
Voc or Vt (or Uo)
Isc or It (or Io)
Po
Ca (or Co)
La (or Lo)
Version Revision
V1 R0
9116 - Version de produit 9116-003
9116QU01
Prepared by:
PB
Page:
4/7
47