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Appendix 1 CSA NI/FM NI/IECEx Ex “ec”/ECAS-EX Ex “ec”
App.1-7
TI 33Q01J30-01E
Yokogawa Electric Corporation
Model
CENTUM VP FIO
Title
Control drawing
No.
NFM020-A13
Page
6
Revision
70
Notes:
1. No revision to this drawing without prior approval of FM.
2. Installation must be in accordance with the National Electrical Code (NFPA 70) and relevant local
codes.
3. In the course of installation, the related documents of GS (General specifications), TI (Technical
Information of Installation Guidance), and IM (User’s Manuals) should be referred to and the
instructions described in the documents should be observed.
4. CENTUM IS SUITABLE FOR USE IN CLASS 1, DIVISION 2, GROUPS A, B, C, and D OR
NONHAZARDOUS LOCATIONS ONLY.
5. It must be observed during the installation that the venting slots of the devices are not blocked
by cable parts, fixing accessories etc.
6. The doors of the cabinets must be closed when CENTUM is energized.
7. Nonincendive field wiring is permitted for the modules listed in tables of the nonincendive field
wiring parameters.
7.1 The nonincendive field wiring circuit concept allows interconnection of nonincendive field wiring
apparatus with associated nonincendive field wiring apparatus, using any of the wiring methods
permitted for unclassified locations.
7.2 Field equipment or other equipment connected to CENTUM by nonincendive field wiring must
be FM approved.
7.3 The control drawing of field equipment or other equipment must be followed at the installation.
7.4 The following conditions must be met. See tables for the nonincendive field wiring parameters
of CENTUM.
Vmax ≥ Voc or Vt; Imax ≥ Isc or It; Ca ≥ Ci + Ccable; La ≥ Li + Lcable
7.5 For current controlled circuits, Imax of the nonincendive field wiring apparatus is not required
and need not be aligned with parameter Isc or It of CENTUM or other associated nonincendive
field wiring apparatus.
8. Use only the following batteries specified by Yokogawa Electric Corporation for the
CPU modules:
CP461: S9548FA, CP471: S9548FA
9. WARNING – EXPLOSION HAZARD. SUBSTITUTION OF COMPONENTS MAY IMPAIR
SUITABILITY FOR DIVISION 2.
10. WARNING – EXPLOSION HAZARD. DO NOT DISCONNECT EQUIPMENT WHEN A
FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS PRESENT.
11. WARNING – EXPLOSION HAZARD. DO NOT REMOVE OR REPLACE FUSES UNLESS POWER
HAS BEEN DISCONNECTED OR WHEN A FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS
PRESENT.
12. WARNING – EXPLOSION HAZARD. DO NOT OPEN ENCLOSURE OR REPLACE BATTERY
WHEN A FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS PRESENT.
Dec. 3, 2021-00