Installation guide
  Mobility and Logistics, Traffic Solutions 
Sopers Lane, Poole, Dorset, BH17 7ER 
Security classification  Unrestricted  Page  25 of 84 
Version  1  Status  Issued 
Last Editor  Carl Rabe  Date  11-Dec-2014 
Document Name  Stratos Outstation General and ICM Handbook  Document No.  667/HB/52250/000 
Copyright © Siemens plc 2014. All Rights Reserved. Mobility and Logistics is a division of Siemens Plc 
4.4.1 CPU LEDs 
LED  State  Description 
SYSTEM 
(Green) 
Slow flash  Normal operation 
Medium flash  Normal operation, Fault present 
Very fast 
flash 
Restricted mode* 
COMMS 
Communications 
(Green) 
On  Under UTC control, pulses off indicate receipt of 
messages 
Off 
Not under UTC control, pulses on indicate receipt of 
messages 
BUSY 
(Red) 
Off  Normally off 
Flashing 
Flashes to indicate the system is busy performing an 
operation that must not be interrupted, for example 
start up, upgrade, USB "memory stick" style interface 
is busy. Do not remove USB device or switch off the 
outstation while this LED is flashing. 
Ethernet 
Connectivity 
(2x Green 
inboard) 
On / Flashing  Indicate activity for the two Ethernet interfaces. Top 
and Bottom 
Modem Power 
(inboard) 
On  Indicates that the Modem Power is on. 
Off  Indicates that the Modem Power is off. 
* Restricted mode is similar to safe mode on a PC where the user can access the unit to 
examine logs, diagnose problems and perform firmware updates. 
Table 7 – CPU Board LED States 
4.4.2 Changing the Heart 
The heart should only ever need to be replaced under the following circumstances: 
1.  CPU Board or unit is faulty and needs to be replaced. 
2.  Heart (SD Card) is faulty. 
Should the heart need to be removed or replaced the following procedure should be 
followed: 
1.  Power down the Stratos Outstation. 
2.  Unplug connectors and slide the unit free of any rack so that the top edge of the CPU 
board can be accessed. 
3.  Push the card into the socket slightly until it ‘clicks’ then release pressure. The card 
can now be pulled from the socket. 
4.  To insert a card, align it with the socket with the contacts facing PCB and closest to 
the socket. Slide it into the socket and apply slight pressure until it ‘clicks’. The card is 
now located correctly. The photos below show the correct orientation for the card. 
Note: It is important that the card is not write-protected. The ‘lock’ switch must be in the 
position shown in the following diagram. 










