2
UG-1339 Rev 0
DEMO MANUAL DC2685A
QUICK START PROCEDURE
Follow the quick start procedure below for basic operation
of the DC2685A kit. Refer to Figure 1 through Figure 3
and Table 1 through Table 4 for proper equipment setup.
1. On the DC2684A daughter card set 4PV# jumper JP2
(Figure 1) to a selected 4-Pair Valid setting as shown
in Table 1.
2. On the DC2684A daughter card set PM1 jumper JP4
and PM0 jumper JP3 (Figure 1) to the power mode
for evaluation specified in Table 2.
3. Align pin 1 of the 30-pin male connector on the
DC2684A daughter card with pin 1 of the 30-pin
female connector on the DC2683A motherboard
as shown in Figure 2. Pin 12 is polarized to assist
with the alignment. Carefully push the daughter card
straight down until the male and female 30-pin con-
nectors are flush with each other.
4. Connect a supply to the motherboard with the posi-
tive rail to AGND (+) and negative rail to V
EE
(–) as
shown in Figure 3. Use a power supply capable of
sourcing the maximum delivered power for all four
ports set by JP3 and JP4 on the daughter card (or
I
2
C configured power). Ramp the supply up to within
the recommended voltage range specified in Table 3.
5. Set the LTC4292/LTC4291 I
2
C address switch SW1
on the motherboard to the one of the four addresses
shown in Table 4.
6. On the DC590, set the VCCIO jumper JP6 to 3.3V.
(Refer to Table 5 and the DC590 demo manual for
further instructions for the DC590.)
7. Connect the DC590 to the DC2683A at connector
J6 with a 14-pin ribbon cable as shown in Figure 3
and open the QuikEval GUI. A GUI for the LTC4292/
LTC4291 is brought up by QuikEval. (Follow the
DC590 demo manual instructions if this has not been
previously setup.)
8. Follow the instructions in the LTC4291 PSE GUI
Users Manual for GUI operation. Firmware must be
downloaded before proceeding with evaluation of the
LTC4292/LTC4291.
9. Connect up to four PDs to the DC2685A RJ45 con-
nector J1, bottom row ports 1-4 as shown in Figure
3.
10. Optionally a 1000BASE-T data source may be con-
nected to the DC2685A RJ45 connector J1, top row
ports 1-4 for data pass through testing.
