L-737-3-E
7
11.2 System Block Diagram (Control Drawing)
HART Communication and Modbus Communication
Fig.11.2.1
CA00
(INTRINSICALLY SAFE APPARATUS)
PA0K
(INTRINSICALLY SAFE RELATED APPARATUS)
HAZARDOUS AREA
NON HAZARDOUS AREA
GENERAL APPARATUS
EXTERNAL
CIRCUIT
DETECT
OR BOARD
POWER
AC00-0V 0/0Hz
or
DC0-30V
CA00
(INTRINSICALLY
SAFE APPARATUS)
HAZARDOUS AREA
NON HAZARDOUS AREA
POWER
AC00-0V 0/0Hz
or
DC0-30V
EXTERNAL
CIRCUIT
PA0K
(INTRINSICALLY SAFE RELATED APPARATUS)
GENERAL APPARATUS
TERMINAL BOX
DETECT
OR BOARD
SEP
ARA
TE DETECT
OR BOARD
DEDICATED CABLE
(TERMINAL BOX FOR INTRINSICALLY
SAFE EXPLOSIONPROOF)
Integrally mounted transmitter
Separately mounted transmitter
TERMINAL BOX
FLAMEPROOF ENCLOSURE (d)
FLAMEPROOF ENCLOSURE (d)