Emerson Fisher FIELDVUE DVC6000, Instruction Manual

Page: 145 / 162

Loop Schematics/Nameplates
September 2013 B-7
GE60771 sheet 6, Rev. B
1 SEE NOTES IN FIGURE B-13
1
1
1
Figure B-12. ATEX Loop Schematic for DVC6005 with DVC6015, DVC6025, and DVC6035
THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED APPARATUS NOT
SPECIFICALLY EXAMINED IN SUCH COMBINATION. THE CRITERIA FOR INTERCONNECTION IS THAT THE VOLTAGE (Vmax or Ui), THE
CURRENT (Imax or Ii), AND THE POWER (Pmax or Pi) OF THE INTRINSICALLY SAFE APPARATUS MUST BE EQUAL TO OR GREATER THAN
THE VOLTAGE (Voc or Uo), AND THE CURRENT (Isc or Io), AND THE POWER(Po) DEFINED BY THE ASSOCIATED APPARATUS. IN ADDITION,
THE SUM OF THE MAX UNPROTECTED CAPACITANCE (Ci) AND MAX UNPROTECTED INDUCTANCE (Li), INCLUDING THE INTERCONNECTING
CABLING CAPACITANCE (Ccable) AND CABLING INDUCTANCE (Lcable) MUST BE LESS THAN THE ALLOWABLE CAPACITANCE (Ca) AND
INDUCTANCE (La) DEFINED BY THE ASSOCIATED APPARATUS. IF THE ABOVE CRITERIA IS MET, THEN THE COMBINATION MAY BE
CONNECTED.
Vmax or Ui Voc or Uo Imax or Ii Isc or Io Pmax or Pi Po Ci + Ccable
≤
Ca Li + Lcable
≤
La
INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL WIRING PRACTICES OF THE COUNTRY IN USE.
LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER’S INSTRUCTIONS.
I
F HAND-HELD COMMUNICATOR OR MULTIPLEXER IS USED, IT MUST BE ATEX APPROVED WITH ENTITY PARAMETERS AND INSTALLED
PER THE MANUFACTURER’S CONTROL DRAWINGS.
GE60771, Sheet 2
Figure B-13. Notes for ATEX Schematics
B