Installation guide
  Mobility and Logistics, Traffic Solutions 
Sopers Lane, Poole, Dorset, BH17 7ER 
Security classification  Unrestricted  Page  41 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 
4.8.1 I/O LEDs 
The three LEDs on the front of the I/O Board as shown below (viewed from the front). 
LED  State  Description 
SYSTEM / RUN 
 (Green) 
Slow Flash  Normal Operation. 
Medium 
Flash 
Configuration or Firmware Download in progress. 
Double Pulse  Low power mode (Future Feature) 
COMMS 
 (Green) 
On  Normal operation, GSPI messages being received 
regularly. 
Off  No relevant GSPI messages received in the last 
second (implies loss of communications), or low 
power mode. 
FAULT 
 (Red) 
Off  Normal operation. 
On  Fault detected see fault section for details of possible 
faults. 
Double Pulse  Firmware is in Error and low power mode. 
Table 18 – PSU & I/O Board LED States 
4.8.2 I/O Faults 
Presence of the following I/O board faults will cause the fault LED to be on. When the fault 
LED is illuminated the fault table webpage can be accessed to determine which of the 
following faults is present. 
Fault  Possible cause/Remedy 
Hardware error  Could be caused by one of the following 
1. I/O fuse (F1) failure 
- replace the fuse (section 7.3.5) 
2.  PSU board hardware failure 
- replace the PSU board 
Supply voltage low (environment error)  The PSU board supply voltage has dropped 
below 8V. 










