Specifications

10/31/02 Tech-304/DWO 14195 Page 37 of 39
Appendix E
Control Schematic for Wiring of Intrinsically safe ICoT (WD-10836)
(Sheet of 4 of 4)
HAZARDOUS LOCATION
CLASS I , DIV 1, GROUPS A,B,C,D
CLASS II , DIV 1, GROUPS E,F,G
CLASS III , DIV 1
ICoT SERIES
POSITIONER
NOTE 5
CONTROL
EQUIPMENT
NOTE 4
ASSOCIATED APPARATUS
(INTRINSIC SAFETY
BARRIERS) NOTES 1 & 2
NONHAZARDOUS LOCATION
4-20mA
ANALOG
OUTPUT
Entity parameters for
each field wiring
terminal pair of ICoT: Vmax = 30V Imax = 100mA
Ci = 120 pF Li = OmH
CSA Notes:
1. Barrier must be a CSA certified, single channel grounded shunt-diode zener barrier or single channel isolating bar-
rier or one dual channel or two single channel barriers may be used where both channels have been certified for use
together with combined entity parameters.
The following conditions must be satisfied:
Voc or Vo less than or equal to Vmax or Ui Ca > Ci + C Cable
Isc or Io less than or equal to Imax or Ii La > Li + L Cable
2. Associated apparatus manufacturer’s installation drawing must be followed when installing this equipment.
3. Control equipment connected to associated apparatus must not use or generate more than 250V.
4. To maintain intrinsic safety, each field wiring pair (4-20 mA and Analog Output) must be run in separate cables or
separate shields connected to intrinsically safe (Associated Apparatus) ground.
5. ROSEMOUNT
®
275 HART
®
COMMUNICATOR is NOT FMRC approved for use in Class II and III Hazardous
Locations.
6. For Class II and III locations where rigid metal conduit is not used, seal ICoT cable entries against dust and fibers
using an appropriate NRTL listed cable gland fitting.
7. Installation should be in accordance with ANSI/ISA RP12.6 and the National Electrical Code (ANSI/NFPA 70).
8. Install in accordance with Canadian Electrical Code Part 1.