II - DCE FEL ČVUT v Praze

Wiring diagram
SM 3 31
AI 2 x 0/4...20mA HART
Input 0
Input 1
X 2
3 4
331-7TB00-0AB0
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
SF
F0
H0
x
II (2) G
[EEx ib] IIC
F1
H1
Figure 4-8 shows the wiring diagram for the analog input module SM 331;
AI 2 x 0/4...20 mA HART. Detailed technical data can be found on the
following pages.
Logic and
backplane
bus interfacing
MO-
DEM
5V internal
ADU
M internal
MO-
DEM
SF
F (0, 1)
Galvanic isolation
390
L +
M
L +
M
H (0,1)
390
Galvanic isolation
50
SF Group fault indication [red]
F (0, 1) channel-specific fault indication [red]
H (0, 1) HART status indication [green]
L +
200
200
Fig. 4-8 Module view and block diagram of SM 331; AI 2 x 0/4...20mA HART
Notes on
intrinsically-safe
installation
Power supply for
an intrinsicallysafe
structure
50
M
SIMATIC S7 HART Analog Modules
L+
M
2-wire transducer
4-wire transducer
2-wire
2-wire
+
–
+
–
4-wire
4-wire
L +
L0 + (2-wire)
M0 + (2-wire) CH0
M0 + (4-wire)
M0 - (4-wire)
L1 + (2-wire)
M1 + (2-wire) CH1
M1 + (4-wire)
M1 - (4-wire)
Section 4.3 provides you with a summary of information on intrinsically-safe
installation. Detailed information can be found in Section 1.5.
In order to maintain the clearances and creepage distances, L+ / M must be
routed via the line chamber LK393 when operating modules with signal
cables that lead to the hazardous location, see Section 1.2.
M
4-17