L-IP User Manual
146
LOYTEC
Version 6.1
LOYTEC electronics GmbH
Figure 140: FT-10 Network Termination.
When using the Free Topology Segment feature of the FT-10, only one termination is
required and can be placed anywhere on the free topology segment. In a double terminated
bus topology, two terminations are required. These terminations need to be placed at each
end of the bus.
LOYTEC recommends using its L-TERM network terminators (LT-13, LT-33 or LT-03)
for network termination (see Figure 140).
11.3 RS-485
The L-IP RS-485 ports are fully compatible with the parameters specified by TIA/EIA
RS-485 for this channel. A maximum of 32 L-IP RS-485 ports can be connected to one
channel.
The RS-485 ports support bit-rates between 300 kbps and 2.5 Mbps. When using bit-rate
auto-detection the L-IP checks for the following bit-rates: 0.61 kbps, 1.221 kbps, 2.441
kbps, 4.883 kbps, 9.766 kbps, 19.531 kbps, 39.0625 kbps, 78.125 kbps, 156.25 kbps, 312.5
kbps, 625 kbps, 1,250 kbps and 2,500 kbps. Standard Neuron Chip compatible channel
parameters with a channel priority of 4, but no node priority are used with these bit-rates. If
bit-rate auto-detection is switched off, the channel parameters for the L
ON
M
ARK
TP-RS485-
39 channel (39 kbps) are used.
RS-485 can only be used in a bus configuration and must be terminated on both ends. The
maximum stub length between the main bus and a single node is 0.3 m.
LOYTEC recommends using its L-TERM network terminators (LT-04 or LT-B4) for
network termination (see Figure 141).