Status Displays; Digital Output - Siemens SIPLUS S7-1500 Produktinformation

Wiring
The connection plug is inserted in the factory state of the fan module.
Connector

Status displays

The following table shows the meaning of the status messages.
Table 1 Status messages of the LEDs
24 V DC ALARM (red)
(green)
LED off LED off
LED on LED off
LED on LED on

Digital output

The digital output "O.K." is logical "1" when the fan module is functioning correctly. The digital output switches to logical "0"
in the event of a fan module alarm.
The digital output is only suitable for controlling a digital input according to IEC 61131-2, type 3.
Digital output
Logical "1"
Logical "0"
Control of the fan
If you operate a CPU with the fan module, make sure that the fan is in operation. You can control the operation of the fan
with the following measures, for example:
• Evaluation of the digital output "O.K."
• Functional checks
Note
Fan module out of operation with a fail-safe CPU
If the fan module was out of operation and at the same time the ambient temperature was >50 °C, arrange for a repeat test
(proof test) of the fail-safe CPU with the manufacturer.
Cooling Fan 175mm
A5E52081313-AB, 04/2023
PIN Signal name
1 L+
2 M
3 O.K.
4 M
Meaning
No supply voltage or supply voltage too low
Normal operating state, no alarm
An alarm is present, no O.K. signal
Meaning
Normal operating state, no alarm
An alarm is present:
• Standstill of the fan
• Low speed of the fan
• Power failure
Name
24 V DC of the CPU supply voltage
Ground of the CPU supply voltage
Digital output
Ground of the digital output
11