3com S7906E Guía De Instalación Rápida

 

3-9 

Figure 3-11 Connect the DC power cable for the PSR1400-D 

 

 

z 

Turn off all switches on the switch before connecting the DC power cables 

z 

If power to the PSR1400-D power module is switch controlled, make sure that the negative input of 

the power module is disconnected when disconnecting power to the power module.  

 

To connect the DC power cables for the PSR1400-D, proceed as follows: 

1)  Loosen the fastening screws on the protection cover with a Phillips screwdriver and remove the 

protection cover. There are two flat washers, one spring washer, and one fastening nut M6 from 

inside to outside on each wiring terminal. 

2)  Loosen the fastening nut on four wiring terminals with a socket wrench M6 and remove the 

fastening nut, spring washer and one flat washer in turn. 

3)  Connect the end of the blue DC power cable marked with – to the negative terminals (-) on the 

power module and fasten the screws. 

4)  Connect the end of the black DC power cable marked with + to the RTN (+) terminals on the power 

module and fasten the screws. 

5)  Put the flat washers and spring washer on the wiring terminal in turn and screw up the fastening nut 

with the socket wrench M6. Repeat this step for the other three terminals. 

6)  Put the protection cover on the wiring terminals and screw up the fastening screws. 

7)  Connect the other ends of the DC power cables to the wiring terminals that provide a power supply 

to the switch. 

To provide PoE supply to attached devices, the S7900E series require appropriate PoE power modules. 

PoE power modules fall into external and internal types.