User`s guide

4-6 Network Cabling and
Connection
Cable Termination
The FTT-10 network segment requires termination for proper data transmission
performance. A total termination impedance of approximately 52.3Ω is required.
Free Topology Segment
In a free topology segment, only one termination is required and may be placed
anywhere on the free topology segment. There are two choices for the termination:
1. RC network (figure 4.6), with R1 = 52.3Ω±1%, 1/8W
2. LPI-10 Link Power Interface, with jumper at "1 CPLR" setting.
Doubly Terminated Bus Topology Segment
In a doubly terminated bus topology, two terminations are required, one at each end
of the bus. There are two choices for each termination:
1. RC network (figure 4.6), with R1 = 105Ω±1%, 1/8W
2. LPI-10 Link Power Interface, with jumper at "2 CPLR" setting.
At this time, only one LPI-10 Interface is supported per segment, which provides one
of the two end terminations required. The other terminator must be an RC-type (see
figure below).
C1
R1
C2
+
+
network
connection
100µF, 50V min
100µF, 50V min
Notes:
1) C1 and C2 are typically aluminum-electrolytic type; observe polarity.
2) C1 and C2 are recommended. They are required for connection
to link power networks and are optional for non-link power
networks.
Figure 4.6 RC Network