Instruction Manual
D101402X012
3660 and 3661 Positioners
September 2015
42
Loop Schematics for 3661 Positioners
This section includes loop schematics required for wiring of intrinsically safe installations. If you have any questions,
contact your Emerson Process Management sales office
.
Figure 27. CSA Loop Schematic for Fisher 3661 Positioner (Drawing GE28591)
GE28591‐A
NOTES:
1. BARRIERS MUST BE CSA CERTIFIED WITH ENTITY PARAMETERS
AND ARE TO BE INSTALLED IN ACCORDANCE WITH THE
MANUFACTURERS I.S. INSTALLATION INSTRUCTIONS.
2. EQUIPMENT SHALL BE INSTALLED IN ACCORDANCE WITH
THE CANADIAN ELECTRICAL CODE, PART I.
3. FOR ENTITY INSTALLATION (I.S. AND NI): Vmax > Voc, Imax > Isc,
Ci + Ccable < Ca, Li + Lcable < La.
HAZARDOUS LOCATION NON-HAZARDOUS LOCATION
INTRINSIC SAFETY
CLASS I, II, III, DIV 1, GROUPS A,B,C,D,E,F,G
NON-INCENDIVE
CLASS I, DIV 2, GROUPS A,B,C,D
CSA APPROVED BARRIERFISHER TYPE: 3661
Vmax = 30 VDC
Imax = 150 mA
Ci = 0 nF
Li = 0 mH
Pi = 1.25 W
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