Switches And Fuses - Siemens Stratos Outstation General, Installation, Commissioning & Maintenance Handbook

Pin Function
4 External 24V -
Input / Output
5 0V
6 Force Charger Off
7 0V
8 DC holdup capacitor
(Future Option)
9 0V
10 External battery
input
Table 13 – General Functions Detailed Description
4.6.4

Switches and Fuses

The PSU board contains two fuses and one switch:
Designation Description
F1 24V I/O Fuse
F2 Internal battery fuse
Security classification Unrestricted
Version 3
Last Editor Alan Doyle
Document Name Stratos Outstation General and ICM Handbook
Copyright © Siemens plc 2014. All Rights Reserved.
Description
Disconnection of the internal power supply at the internal
2-way 24V connector allows external 24V DC power to be
supplied to the system via this pin instead of using the
internal power supply.
This pin also provides access directly to the 24V of the
internal PSU and could be used to power external
equipment if it is desired to have no battery backup for the
external load (power on this pin is fully removed when
mains power is lost).
Common supply return
This active low signal when shorted to 0V will disable the
internal battery charger.
Common supply return
Not used. An optional variant could be created in future
which provides additional hold-up capacitance on 24V DC,
and on such a variant the hold-up capacitance could be
expanded by connecting an external capacitor to this pin.
Common supply return
If the internal battery is disconnected at the 2-way battery
connector and removed, an external 12V lead-acid or lead-
crystal battery can be connected to this pin with positive to
pin 10 and negative to pin 9. An external battery must be
fused externally with an in-line fuse holder and 5A quick
blow fuse.
Value
160mA Quick Blow
5A Quick Blow
Table 14 – PSU Board Fuses
Mobility and Logistics is a division of Siemens Plc
Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Part Number
518/4/90285/020
518/4/90285/008
Page 38 of 92
Status Issued
Date 05-Oct-2017
Document No. 667/HB/52250/000