II - DCE FEL ČVUT v Praze

Wiring diagram
Notes on
intrinsically-safe
installation
Power supply for a
intrinsically-safe
structure
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
Fig. 2-3 shows the terminal diagram of SM 322; DO 4 x 24V/10mA.
The block diagram and detailed technical specifications for
SM 322; DO 4 x 24V/10mA are provided on the following pages.
SM 322
DO 4 x 24VDC/10mA
Output 0
Output 1
Output 2
Output 3
X 2
3 4
322-5SD00-0AB0
SF
F0
0
F1
1
x x
[EEx ib] IIC
F2
2
F3
3
1
L+
2
3
4 CH 0
5
6
7
8 CH 1
9
10
11
12
13 CH 2
14
15
16
17 CH 3
18
19
20
M
Channel number Terminal diagram
SF group fault [red] F (0...3) channel-specific fault
indication [red]
0...3 status indication [green]
Fig. 2-3 Wiring diagram of SM 322; DO 4 x 24V/10mA
SIMATIC S7 Ex Digital Modules
You must connect the DM 370 dummy module between the CPU or IM 153-2
(distributed configuration) and the Ex I/O modules whose signal cables lead into
the hazardous area. In a distributed configuration with an active backplane bus,
you should use the explosion-proof partition instead of the dummy module.
Additional information on system design can be found in Section 1.3 - 1.5.
In order to maintain the dearances 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.
2-15