II - DCE FEL ČVUT v Praze

SIMATIC S7 HART Analog Modules
Wiring diagram
4-22
SM 3 32
AO 2 x 0/4...20mA HART
Output 0
Output 1
X 2
3 4
332-5TB00-0AB0
SF
F0
H0
x
II (2) G
[EEx ib] IIC
F1
H1
Figure 3-18 shows the wiring diagram for the analog output module SM 332;
AO 2 x 0/4...20mA HART. Detailed technical data for the analog output module
can be found on the following pages.
Logic and
backplane
bus
interfacing
H (0,1)
Modem
SF
D A
Digital / analog
transformer
L +
M
D A
Modem
F (0,1)
L +
M
Galvanic isolation
SF Group error indicator [red]
F (0, 1) Channel-specific fault indication [red]
H (0, 1) HART-status indication [green]
390
HART
L +
Isolation amplifier
390
HART
Fig. 4-9 Module view and block diagram of SM 332; AO 2 x 0/4...20mA HART
Notes on
intrinsically-safe
installation
Power supply for
an intrinsicallysafe
structure
Unswitched output
channels
50
50
M
L+
CH0
0...650
M
CH1
0...650
L +
QI 0
M 0-
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
M
CH0
QI 1 CH1
M 1-
Section 4.3 provides you with a summary of infomation 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.
To ensure that the unswitched output channels of the analog output module
SM 332; AO 2 x 0/4...20mA HART are without current or voltage, you must
deactivate them. You can deactivate an output channel in STEP 7 using the
“Output” parameter block (see Section 4.4).