Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation
077085503 / March 2019 2-49
You can connect the instrument to the LAN in a one-to-one, one-to-many, two-network card, or
enterprise configuration, as described in the following topics.
One-to-one connection
With most instruments, a one-to-one connection is done only when you are connecting a single
instrument to a single network interface card.
A one-to-one connection using a network crossover cable connection is similar to a typical RS-232
hookup using a null modem cable. The crossover cable has its receive (RX) and transmit (TX) lines
crossed to allow the receive line input to be connected to the transmit line output on the network
interfaces.
Figure 34: One-to-one connection with a crossover cable
One-to-many connection
With a LAN hub, a single network interface card can be connected to as many instruments as the hub
can support. This requires straight-through network (not crossover) cables for hub connections.
The advantage of this method is easy expansion of measurement channels when the test
requirements exceed the capacity of a single instrument. With only the instruments connected to the
hub, this is an isolated instrumentation network. However, with a corporate network attached to the
hub, the instruments become part of the larger network.
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