B&K Precision 9171-9174 - Manual - Manual (Page 49)

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Note:The cables are used to link the power supplies together.
It is recommended to keep the cables as short as
possiblebetween each unit.
Communicate via USB
1. Take one Ethernet CAT5 cable and connect one end to
labeled “ OUT” on the RS485 interface card of the first power
supply (the one that will be connected to the PC via USB
cable).
2. Connect the other end to labeled “ IN” on the RS485
interface card of the second power supply.
3. To connect a third power supply, use another Ethernet CAT5
cable and connect one end to labeled “ OUT” on the
second power supply. Connect the other end to labeled
“
IN” on the interface card of the third power supply.
4. Repeat steps 2 and 3 for each subsequent power supplies
added to the multi connection, making sure the connections
follow the “
IN” and “OUT” scheme as described.
5. After connecting to the “ IN” port of the last power supply in
the connection, if there are more than 10 units connected,
set the physical switch labeled “
Terminator” on the RS485
interface card of this last unit to “ On”.
Note: The terminator switch should only be set to “On” for the
last power supply in the chain. All other power supplies
should have the terminator switch set to “ Off”.
6. With a USB Type A to Type B cable, connect one end to the
USB interface of the first power supply. Connect the other
end to a PC to be used to control all the supplies. Refer to
Figure 15 to verify your connections.