Field Wiring For –48 Vdc Powered Vp 300; Ac To Dc Power Supply Conversion - Toshiba VP 300 Installation Instructions Manual

5-106 Installation and Maintenance Manual
I AC to DC Power Supply Conversion
Before proceeding, read the instructions in the section entitled Installing the VP 300 with a –48 VDC
Power Supply Unit, in the INSTALLATION chapter of this manual. Make sure that the material is
available to connect the cabinet to the –48 VDC power source.
The VP 300 may be powered by an AC or DC power source. The cabinet contains either an AC or DC
version of the power supply unit and power filter assembly to work with the power source selected. To
convert the VP 300 from an AC to a DC powered system, use the following instructions.
This conversion requires installation of the following subassemblies:
•
DC Power Supply Unit (Part No. 740-6027-001).
•
DC Filter Assembly (Part No. 740-6075-001).
•
DC Backplane Harness (Part No. 530-6021-001).
These subassemblies must be on hand before continuing.
Damage to the VP 300 may occur if replacement procedures are not performed in the
order given.
Removing AC
Subassemblies
Toshiba VP Systems Release 7.1 July, 1994
Conduit with three
10–gauge wires
DC
Power
Source
Earth Ground
Figure 5-17 Field Wiring for –48 VDC Powered VP 300
N WARNING N
To remove the AC subassemblies, follow the steps below.
1. Remove the AC Power Supply Unit (PSU) following the instructions
Removing Power Supply in this section.
2. Remove the VCU and CPU PCAs from slots A13 and A14, respectively.
Terminal Block and Ground
Stud on Back of VP 300