CPC Router and Repeater, Инструкция по установке и эксплуатации

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from the transformer to the bottom right corner of
the repeater circuit board (see Figure 5-3).
The internal repeater board is laid out and wired in
exactly the same way as the external repeater (see Section
5.2.1) with the exception of power wiring. The internal
repeater gets power from the PC104 jack, not from a sepa-
rate transformer.
Because the four-channel repeater has two more chan-
nels than the standard repeater, the board layout is slightly
different than the two-channel model. The connectors for
the four channels are on the top and right sides of the
repeater board (Figure 5-4).
1. Locate the Echelon terminals on the repeater (see
Figure 5-4). There are two sets of two connectors
on the top of the card, and two sets on the right
hand side.
2. To connect an Echelon wire to a channel, connect
the incoming three conductor wire to one set of
terminals and the outgoing wire to the other set
of terminals.
3. If a channel of the repeater is at the endpoint of a
daisy chain, it must be terminated by setting the
channel’s termination jumpers. Each channel has
a pair of jumpers that can be used for termination.
The top two channels use jumpers J18/J19 and
J11/J14, while the two channels on the right side
of the repeater use jumpers J1/J4 and J7/J8. The
locations of these jumpers and how to set them
are shown in Figure 5-4.
If one or more channels on any four-channel repeater
are not being used, you must set the channel’s jumpers to
the TERMINATED position. Leaving an unused channel
unterminated may cause network communication prob-
lems.
Figure 5-4
- Four-Channel Repeater Hookup