Siemens TRAFFIC CONTROLS TC12 Manual De Usuario

 

TC12 Installation, Commissioning & Maintenance Handbook 

The cover must ALWAYS be fitted before any cables are installed, and should 
NEVER be removed whilst the telephone cable (from socket SK1 on the PCB) is 
connected to the telephone network. 
 

PLA

S2

PLB

Serial
 No.

Battery

ON/OFF

LP2 - Carrier Detect

LP3 - Transmit confirm

LP4 - Watchdog Fail

SK2 - Reply

Line Jack
Sockets

SK3 - Control

6-Way Telecom Socket

S1

2/4 Wire
Selector

B1

Status

LEDs

S3

Line level
switches

60-Way
connector for
LMU inputs

40-Way
extended
system bus
connector

Lithium Battery

SK1

600R / HI-Z
Selector

S4

Covered area. (Cover same shape on bottom of PCB)

Cover fixing

Processor

PLD

Firmware

Closed ‘1’
when pushed
up. Open ‘0’
when pushed
down.
(Example
shown open)

2 wire

4 wire

600R

HI-Z

On     Off

 

Before any connectors are attached to the Integral OTU PCB, the configuration 
switches need to be set up as described below. Figure 34 shows the position of 
the switches on the PCB and the directions to set the switches to for different 
options. 
 
There are four switches on the PCB: 
 
S1 

 

- 

2/4 Wire Select Switch 

S2 

 

- 

Lithium Battery On/Off Switch 

S3  

 

- 

Line Level Switch 

S4 

 

- 

600 Ohm/High Impedance Switch 

 
These are set as follows: 
 
1.  

 

S1 - 2/4 Wire Select Switch 

Set to either 2 or 4 wire (see Figure 34) as required by the position indicated on 
the installation sheet for the Integral OTU. 
 

666/HE/43100/000  

Page 168 

Issue 9