Siemens S5-135U/155U appendix Auxiliary Submodule, Terminals

Central Controllers and Expansion Units Power Supply Units

Terminals
	DC Line	Monitor Output
	24V DC
	+ -
		Disconnect
		before removing
		power supply!
	L+M
	1 2 3	4	2	5 2	6 2	7
ID	Label	Element			Purpose

1

2

Protective conductor terminal for PSU module and housing.

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

3

DC Line

Screw terminals

System connection, 24 V input voltage

4

5

6

7

Monitor Output

Enable Power supply

DC 24 V; 0.4 A

Ext.Batt. 3.4 V

Relay output

Input/ output

Output

Sockets

Standstill of one or both fans is signaled via LED and relay contact, and results in shutdown of output voltages (can be shut down via jumper F-R of the PSU; then only relay signal and LED indication).

No voltage at the EN input results in shutdown of the PSU. Not more than 7 EN inputs may be driven with one UH output (front terminal).

This output can be used to power the enable inputs of the U Periphery.

Sockets for external 3.4 V backup voltage.

!

15 V Auxiliary Submodule

Caution

Observe the appropriate VDE specifications, especially VDE 0100. The terminals at the front are suitable for a conductor cross-section of up to 4 mm2, solid, or 2.5 mm2, flexible. Ensure adequate strain relief of the connections.

You can add a 15 V auxiliary submodule to the 6ES5 955-3NA12 power supply unit (for example, if you wish to use SINEC H1). The auxiliary submodule produces a stabilized 15 V output voltage from the 24 V output voltage. The auxiliary submodule is short-circuit protected. The output voltage is monitored. If the voltage is too low, the green ª15/24 V o.k.º LED on the front plate goes off. If the voltage is too high, the output is short-circuited by a thyristor.

System Manual	4-59
C79000-G8576-C199-06