P/N 66109923001 Rev. A
5
to all the remaining ports. All LEDs except TX-1 are illuminated. On the right side of the figure,
the NexStar is receiving data from an S-Net device on port 3. Again, data is transmitted to all
other ports; all LED's except TX-3 are illuminated.
ACU S-NET S-NET S-NET S-NET
TX-1 TX-2
TX-3
TX-4
TX-5
COMM ACTIVE
ACU S-NET S-NET S-NET S-NET
TX-1 TX-2
TX-3
TX-4
TX-5
COMM ACTIVE
Figure 6: Transmit LEDs
Note: High speed network communications may cause all LEDs to appear illuminated.
F
USES
Each of the five ports on the NexStar is individually fused. Fuses for the ports are located at
positions F1 through F5 on the PCA. These fuses are 2-amp, normal-blow. Approved suppliers
for replacement fuses and the vendor's part numbers are shown in Table 3.
Table 3: Approved Fuse Vendors
Vendor
Part Number
Littlefuse
273002
Bel
MB2
J
UMPERS
Five jumpers on the PCA can be used to provide termination required (see page 8) for S-Net
lines. Installing a jumper enables a 120-ohm, ¼ watt resistor.
NO TERMINATION
120 OHMS TERMINATION
Figure 7: Termination Jumper
PHOENIX CONNECTORS
