Panel Layout Considerations - Siemens Simatic S7-200 System Manual

Installing an S7-200 Micro PLC
2.1

Panel Layout Considerations

Installation Configuration
You can install an S7-200 either on a panel or on a standard rail. You can mount the S7-200
either horizontally or vertically. An I/O expansion cable is also available to add flexibility to
your mounting configuration. Figure 2-1 shows a typical configuration for these types of
installations.
Panel mounting
S7-200
Figure 2-1
Clearance Requirements for Installing an S7-200 PLC
Use the following guidelines as you plan your installation:
The S7-200 CPU and expansion modules are designed for natural convection cooling.
You must provide a clearance of at least 25 mm (1 in.), both above and below the units,
for proper cooling. See Figure 2-2. Continuous operation of all electronic products at
maximum ambient temperature and load reduces their life.
For vertical mounting, the output loading may need to be derated because of thermal
constraints. Refer to Appendix A for the data sheet for your particular CPU. If you are
mounting the CPU and modules on a DIN Rail, the DIN rail stop is recommended.
If you are installing an S7-200 horizontally or vertically on a panel, you must allow 75 mm
(2.9 in.) for the minimum panel depth. See Figure 2-2.
If you plan to install additional modules horizontally or vertically, allow a clearance of at
least 25 mm (1 in.) on either side of the unit for installing and removing the module. This
extra space is required to engage and disengage the bus expansion connector.
Be sure to allow enough space in your mounting design to accommodate the I/O wiring
and communication cable connections.
25 mm
(1 in.)
Clearance for cooling
25 mm
(1 in.)
Figure 2-2
2-2
I/O I/O
Mounting Configurations
      Â
      Â
      Â
S7-200 I/O
      Â
      Â
      Â
Clearance for removing
expansion I/O module
Front View
Horizontal and Vertical Clearance Requirements for Installing an S7-200 PLC
Standard rail mounting
S7-200 I/O I/O
I/O I/O
Front of the
enclosure
S7-200
25 mm
(1 in.)
Side View
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
Mounting
surface
75 mm
(2.9 in.)