Siemens Simatic S7 Series System Manual

Installation
3.3 Installation and removal procedures
S7-200 SMART
44 System Manual, 09/2015, A5E03822230-AC
Table 3- 1 Installing a CPU on a DIN rail
Task
Procedure
Follow the steps below to install a CPU on a DIN rail.
1. Secure the rail to the mounting panel every 75 mm.
2. Snap open the DIN clip (located on the bottom of the module) and hook the back of
the module onto the DIN rail.
3. Rotate the module down to the DIN rail and snap the clip closed. Carefully check
that the clip has fastened the module securely onto the rail. To avoid damage to the
module, press on the tab of the mounting hole instead of pressing directly on the
front of the module.
Note
Using DIN rail stops could be helpful if your CPU is in an environment with hig
h vibration
potential or if the CPU has been installed vertically. Use an end bracket (8WA1 808 or 8WA1
805) on the DIN rail to ensure that the modules remain connected.
If your system is in a high
-vibration environment, then panel-
mounting the CPU will provide a
greater level of vibration protection.
Table 3- 2 Removing a CPU from a DIN rail
Task
Procedure
Follow the steps below to remove a CPU from a DIN rail.
1. Remove power from the CPU and any attached I/O modules.
2. Disconnect all the wiring and cabling that is attached to the CPU. The CPU and
most expansion modules have removable connectors to make this job easier.
3. Unscrew the mounting screws or snap open the DIN clip.
4. If you have expansion modules connected, slide the CPU to the left to disengage it
from the expansion module connector. Note: unscrewing or unsnapping the DIN
clips of the expansion modules can make it easier to disengage the CPU.
5. Remove the CPU.

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.