Siemens TRAFFIC CONTROLS TC12 Manual De Usuario

 

TC12 Installation, Commissioning & Maintenance Handbook 

666/HE/43100/000  

Page 190 

Issue 9 

 
(4) S4 - 600 Ohm/High Impedance Switch 
If the switch is set to high impedance when it should be set to 600 Ohms, the 
transmit signal for all OTUs on the line and the receive signal for the particular 
OTU will be up to 3dB higher than if the switch was set correctly. The 
characteristics of the line may also be affected. 

 

If the switch is set to 600 Ohms when it should be set to high impedance this will 
reduce signal levels and may upset the characteristics of the line. 
 

System Fault LED lit on Controller 
Main Processor 

Use handset to access fault log for 
information on the type of fault that has 
occurred, this may be an Integral OTU 
fault 

Watchdog LED On 

Software not running correctly. Power 
down and up again. 

OTU not replying to control message 

OTU Switch settings incorrect 

 

OTU configured incorrectly via the 
handset - repeat configuration. 

 

Extended system bus cable 
disconnected/faulty. 

 

No control data - low line level, 
interference BT lead disconnected / 
faulty. 

 

The outstation PCB is fitted with a Lithium Battery (B1, part number 
418/4/97186/000). This battery must be replaced every 4 years.  
 
There may be a label already on the battery showing the date the battery was 
shipped. This should be covered with a label showing the date the battery is 
fitted into the equipment. The replacement date is therefore four years after the 
date on the label.  
 

WARNING -  Care should be taken when handling and disposing of Lithium 

batteries. Refer to code of practice CP526. 

 

Integral OTU kit 

667/1/27004/000 

Lithium battery  

418/4/97186/000 

LMU Spares (if equipped): 

 

Current Transformer 

667/7/25171/000 

Voltage Monitoring Transformer 

667/7/25172/000 

Optional spares: 

 

Handset terminal 

667/4/13296/000