Siemens S7-400 installation manual Methods of Ventilation

Installing the S7-400

2.7Methods of Ventilation

Methods of Ventilation

Under extreme ambient conditions, particularly when operating S7-400 modules in cabinets, you can use the cable duct or fan subassembly to optimize ventilation.

There are two methods of supplying air to the modules. You draw in air either from the back or from below. The cable duct and fan subassembly can be converted for this purpose.

The following figure shows the ventilation when air is drawn in from the back.

	Wall
	Exhaust air
	Modules
	Cable duct or fan
	subassembly
	Exhaust air
	Modules
	Supply air
2-18	Automation System S7-400	Hardware and Installation
		A5E00850741-01