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AVID SmartCal valve positioner
Installation & operating instructions
Appendix H -
Control schematic for wiring of intrinsically safe SmartCal for ATEX & IECEX
(Sheet 1 of 2)
Hazardous location
Ex ia IIC
Remote Hall effect sensor (optional)
No. 5 in 4th digit of part number.
50 feet max. length, 5 conductor 22
AWG cable provided with option
SmartCal series
positioner
Associated apparatus
(Intrinsic safety barriers)
Notes 1 & 2
Control
equipment
Note 4
Note 5
4-20 mA
JP5
Analog
output
Nonhazardous location
Entity parameters for each field wiring terminal pair of SmartCal:
Vmax = 30 V
Imax = 100 mA
Pi = 0.75 Watt
Ci = 0 pF
Li = 17.25 µH
1. ATEX Entity approved associated apparatus used in an approved configuration, such that:
A. SmartCal Vmax ≥ Voc and Vt of associated apparatus.
B. SmartCal Imax ≥ Isc and It of associated apparatus.
C. Ci of SmartCal cable capacitance ≤ Ca of associated apparatus.
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 250 V.
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. Where rigid metal conduit is not used, seal SmartCal cable entries against dust and fibers using
an appropriate NRTL listed cable gland fitting.
6. Installation should be in accordance with the local / national electrical codes of practice.
