Siemens Simatic S7-400 Installation Manual

Maintenance
7-14
Automation System S7-400 Hardware and Installation
A5E00850741-01
7.8 Replacing Fans in the Fan Subassembly During
Operation
Removing the Fans
1. Use a screwdriver to make a quarter turn counter-clockwise and open the two
quick-release locks on the front of the fan subassembly.
Fan 1 Fan 2 Fan 3
LEDs:F1=Fan1
F2=Fan2
F3=Fan3
Quick-release locks
Reset button
Base
2. Grasp the base with both hands, press it down slightly and pull it fully out of the
fan subassembly.
3. Release the fan to be replaced by pressing the fan grip away from the housing
with your thumb.
Fan
Base
Fangrip
4. Pull out the fan to be replaced.

Siemens Simatic S7-400 Specifications

General

Programming Language	STEP 7 (LAD, FBD, STL, SCL, GRAPH)
Communication Interfaces	MPI, PROFIBUS
Power Supply	24 V DC, 120/230 V AC (Power supply modules are separate and chosen based on system requirements)
Operating Temperature	0°C to 60°C
Mounting	Rack mounting
Processor	CPU 412-1, CPU 414-2, CPU 416-2, CPU 417-4 (Different CPUs offer varying performance and features)
Relative Humidity	5 to 95% (non-condensing)