Emerson Fisher 3710 Instruction Manual page 54

3710 and 3720 Positioners
September 2017
Figure 35. FM Loop Schematic for Fisher 3722 Converter (Installation Drawing GE28590)
WARNING
FOR INTRINSICALLY SAFE APPLICATIONS: THE APPARATUS ENCLOSURE
CONTAINS ALUMINUM AND IS CONSIDERED TO CONSTITUTE A POTENTIAL
RISK OF IGNTION BY IMPACT AND FRICTION. AVOID IMPACT AND FRICTION
DURING INSTALLATION AND USE TO PREVENT RISK OF IGNTION.
NOTES:
1. THE INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRIC CODE (NEC), NFPA 70,
ARTICLE 504 AND ANSI/ISA RP12.6 OR ARTICLE 505.
2. THE CLASS 1, DIV 2 APPLICATIONS MUST BE INSTALLED AS SPECIFIED IN NEC ARTICLE 501‐4(B).
EQUIPMENT AND FIELD WIRING IS NON‐INCENDIVE WHEN CONNECTED TO APPROVED BARRIERS WITH
ENTITY PARAMETERS.
3. LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER'S INSTRUCTIONS.
4. MAXIMUM SAFE AREA VOLTAGE SHOULD NOT EXCEED 250 Vrms.
5. RESISTANCE BETWEEN BARRIER GROUND AND EARTH GROUND MUST BE LESS THAN ONE OHM.
6. NORMAL OPERATING CONDITIONS 30 VDC 20 mADC.
7. FOR ENTITY INSTALLATION (I.S. AND N.I.):
Vmax > Voc, or Vt
Imax > Isc, or It
Pi > Po, or Pt
GE28590‐B
54
HAZARDOUS LOCATION
INTRINSIC SAFETY
CLASS I, II, III, DIV 1, GROUPS A,B,C,D,E,F,G
CLASS I ZONE 0 AEx ia IIC
NON-INCENDIVE
CLASS I, DIV 2, GROUPS A,B,C,D
FISHER TYPE: 3722
Vmax = 30 VDC
Imax = 150 mA
Ci = 0 nF
Li = 0 mH
Pi = 1.25 W
Ci + Ccable < Ca
Li + Lcable < La
Instruction Manual
D101728X012
NON-HAZARDOUS LOCATION
FM APPROVED BARRIER