Appendix B. Connector Pinouts

10BaseT

This is used to connect the TDU 120e to the local area net- work. See Table B-9.

Connector type (USOC), Shielded 8-pin, module TDU 120e.

Table B-9. 10BaseT Ethernet Connector

Pin

Name (To Nic)

 

 

1

TX1

 

 

2

TX2

 

 

3

RX1

 

 

6

RX2

 

 

Alarm

This is used to connect the TDU 120e to an external alarm device. See Table B-10.

Connector Type 4-pin, Eurostyle connector

Table B-10. External Alarm Device Connector

Pin

Name

Description

 

 

 

1

NC

Normally closed

 

 

 

2

NO

Normally open

 

 

 

3

COM

Common

 

 

 

4

GND

Connected to unit chassis

 

 

 

Power

Table B-11. Power Connector (DC powered units)

Pin

Name

Description

 

 

 

1

+

+24 or +48 VDC

 

 

 

2

_

-24 or -48 VDC

 

 

 

B-8

TDU 120e User Manual

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ADTRAN TDU 120e user manual 10BaseT, Alarm, Power