Fisher FIELDVUE DVC6200 Instruction Manual page 100

DVC6200 Digital Valve Controller
This section includes loop schematics required for
wiring of intrinsically safe installations. It also contains
the approvals nameplates. If you have any questions,
contact your Emerson Process Management sales
office.
NOTES:
THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED APPARATUS NOT SPECIFICALLY EXAMINED
1
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
3 INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (CEC) PART 1 AND ANSI/ISA RP12.6
4 MAXIMUM SAFE AREA VOLTAGE SHOULD NOT EXCEED 250 Vrms
5 RESISTANCE BETWEEN INTRINSICALLY SAFE GROUND AND EARTH GROUND MUST BE LESS THE ONE OHM
B
6 LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER'S INSTRUCTIONS.
IF HAND-HELD COMMUNICATOR OR MULTIPLEXER IS USED IT MUST BE CSA APPROVED WITH ENTITY PARAMETERS AND INSTALLED PER THE MANUFACTURER'S
7
CONTROL DRAWING
GE42818 sheets 2 and 8
92
HAZARDOUS LOCATION
CLASS I, DIV 1, GROUPS A,B,C,D
CLASS II, DIV 1, GROUPS E,F,G
CLASS III
DVC6200
Vmax = 30 VDC
Imax = 226 mA
Ci = 5 nF
Li = 0.55 mH
Imax or Ii  Isc or Io Pmax or Pi  Po
Figure B-1. CSA Loop Schematic
Figure B-2. CSA Nameplates
NON-HAZARDOUS LOCATION
CSA APPROVED BARRIER
NOTE 7
Ci + Ccable  Ca Li + Lcable  La
NOTE 1, 3, 4, 5, 6
LABEL FOR NATURAL GAS
CERTIFIED TERMINAL BOX
September 2010