Central Controllers and Expansion Units Power Supply Units

4.5Fan Submodules

4.5.1Technical Description

The fan submodule variants 6ES5 988-3LA11 (230 V AC) and 6ES5 988-3NA11 (24 V DC) are described in the following section.

A fan submodule has the following function:

SHeat dissipation

The fan submodule dissipates any excess heat created in the central controller or expansion unit.

Connections and

The following terminals and LEDs are fitted on the front plate (the front

LEDs

plate of the -3LA11is shown as an example):

 

 

SIEMENS

 

 

AC line

 

10

AC 230V

 

9

 

8

 

3LA11

7

CAUTION!

5 6

Disconnect

before

removing

power supply!

988-

3 4

Voltage selector

inside the unit!

6ES5

1 2

L1 N

 

Monitor Output

Relay max. 250V AC/3A

 

Fan

 

Fault

1

2 3

Use copper wire 60/75￿ C only!

Tightening torque: terminals 0,8Nm/ 1,8 Nm

ID

1

2

3

4

5

Label

Element

 

 

 

 

 

 

230V AC

Screw

 

terminals

 

L1, N

 

 

24V DC

Screw

 

terminals + ±

 

 

Monitor Output

Relay output

 

 

Fan Fault

Red LED

 

 

Purpose

Protective conductor terminal for fan submodule and housing.

ZStrain reliefs for connecting cables, with metal contact surface for cable shields.

AC connection

(details for -3LA11)

24 V DC supply

(details for -3NA11)

Standstill of one or both fans is signaled via LED and relay contact.

The LED lights up to indicate a fan fault.

4-70

System Manual

C79000-G8576-C199-06

Page 136
Image 136
Siemens S5-135U/155U Fan Submodules Technical Description, Connections, LEDs, Plate of the -3LA11is shown as an example