Siemens S5-135U/155U appendix Switch the system voltage on

Central Controllers and Expansion Units Power Supply Units

Switching on the Power Supply Unit for the First Time

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How to Switch On the Power Supply Unit

Caution

If you have set the voltage selector switch to 120 V, but the actual voltage value is 230 V, the power supply unit may be damaged when line voltage is switched on.

When you have made all the settings, switch the power supply unit on as follows:

Step

1

2

Action

Switch the power supply unit on with the Power switch.

Switch the system voltage on.

Result

If the required basic load (see Section 4.4.6, Technical Specifications) is in circuit, the power supply unit will start.

The green LEDs ª5V o.k.º ª15V o.k.º

ª24V o.k.º light up.

The fans run.

After a maximum of 6 minutes, the rechargeable battery has been charged sufficiently for you to be able to start up the central controller or the expansion unit.

The charge time for the rechargeable battery can be up to 46 hours, depending on how low the battery was. Note that during this time, backup using the rechargeable battery is restricted.

Once the rechargeable battery is fully charged, the following load-dependent backup times apply:

Ibackup mA	0.25	1	2	3	4	5
Backup time in weeks	18.8	6.3	3.4	2.3	1.7	1.4

System Manual	4-35
C79000-G8576-C199-06