Communication solutions for power utilities
UNIVERSAL TELEPROTECTION TPU-1
INSTALLATION AND COMMISSIONING MANUAL Web version TPU-1R - Rev. 5.9 (May 2018)
4.3.2 IDTU module
The IDTU module gives a 2 Mbit/s interface according to codirectional G.703
Recommendation of the ITU-T.
Figure 19 shows a front view of the IDTU module. As can be seen in the figure, the IDTU
module has two BNC connectors (75 Ω) and a RJ-45 connector (120 Ω) for twisted pair. The
output impedance (75 Ω or 120 Ω) according to the type of connector and whether the cable
shield is connected to earth (output not balanced) or not (output balanced) is configured by
internal settings.
In IDTU.00 modules of version 3.1, the type of connector (BNC or RJ-45) is programmed
from the TPU-1 Management System.
Make sure that the module is completely fixed to the chassis.
LEDs associated with the RJ-45 connector
• Amber. It lights when there is BER alarm.
• Green. It lights when there is synchronism.
Figure 19 Connectors of the IDTU line interface module of version IDTU.00 (3.0)
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