Instruction Manual
D101351X012
646 Transducer
January 2015
23
Figure 13. FM Loop Schematic (Installation Drawing GE28590)
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 Ci + Ccable < Ca
Imax > Isc, or It Li + Lcable < La
Pi > Po, or Pt
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.
WARNING
GE28590-B
HAZARDOUS LOCATION NON-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
FM APPROVED BARRIER
FISHER TYPE: 646
Vmax = 30 VDC
Imax = 150 mA
Ci = 0 nF
Li = 0 mH
Pi = 1.0W