User Manual

219

MN024-08

The TRSN subrack is also available in passive version TRSNx-3, which can be

feeded by direct current (–72 to –36 Vdc). In this case, the -48 Vdc current is

conveyed to the remote units thanks to a passive distribution system (please

refer to fig. 5.45b).

Please read carefully the cabling instructions in order to connect the provided

power cable to the poles of the -48 Vdc connector properly (see fig.5.44b).

Ground terminals are part of the power supply connectors. External grounding

terminals (screw) are also available (see fig. 5.43a,b)

Mains connectors also house the following fuses:

• 250V, 4A delayed type for the active version (feeded by 115 Vac mains

or by 230 Vac mains)

• -48V, 15A delayed type for the passive version (feeded by -48 Vdc

supply)

TRS

TRSN

Fig. 5.44. (a): Power supply connector, fuse, voltage selector and ground screw on the the rear

side of the TRSN subrack feeded by -48 Vdc current TRS/TRSN rear panel. (b) Cabling

instructions for the -48 Vdc connector

(b)

(a)

(

)

Fig. 5.45.

(a) Active distribution system used

by a TRS/TRSN subrack feeded by

115Vac-230Vac mains

(b) Passive distribution system used

by a TRSN subrack feeded by a -48

Vdc power supply,