NetVanta 3000 Series Hardware Installation Guide Unit Installation61200860L1-34AA Copyright © 2010 ADTRAN, Inc. 87Installing Dial Backup and Network Interface ModulesThe DIMs plug onto the NIMs. The NIMs are then installed in the rear panel option module slot. Thefollowing tables list the installation steps. Also, see Figure 46 on page 88 and Figure 47 on page 89.Instructions for Connecting DC Power Source to the NetVanta 3205Step ActionFor +24 VDC operation:1 Connect the negative terminal of the +24 VDC power source to the negative terminal of the NetVanta3205 DC power connector located on the rear of the unit. (See Figure 45 on page 86.)2 Connect the negative terminal of the +24 VDC power source to the chassis ground of the +24 VDC powersource.orConnect the negative terminal of the +24 VDC power source to Earth ground.3 Connect the positive terminal of the +24 VDC power source to the positive terminal of the NetVanta 3205DC power connector.4 Connect the ground terminal of the NetVanta 3205 DC power connector to Earth ground.For -48 VDC operation:1 Connect the positive terminal of the -48 VDC power source to the positive terminal of the NetVanta 3205DC power connector located on the rear of the unit. (See Figure 45 on page 86.)2 Connect the positive terminal of the -48 VDC power source to the chassis ground of the-48 VDC power source.orConnect the positive terminal of the -48 VDC power source to Earth ground.3 Connect the negative terminal of the -48 VDC power source to the negative terminal of the NetVanta 3205DC power connector.4 Connect the ground terminal of the NetVanta 3205 DC power connector to Earth ground.For NetVanta modules with outside plant connections, ensure that all cables areremoved from the module before installing or removing it from the NetVanta chassis.Always remove power from the unit prior to removing or installing a module.Improper installation may result in damage to the modules.