The recommended cable type to be used is STP cat5 (shielded twisted pair category
5). We recommend using a 20-24-AWG cable.
6.1.3 Daisy Chaining
You can connect up to 32 panels to a single serial line using a daisy-chain
formation, which is done by drop-down RS-485 wiring (Figure 19).
Figure 19: Daisy Chaining
This can increase the maximum distance from the PC to the last panel in the chain
to 4,000 ft (1,219.2 m).
The first panel is connected directly to the server using an MD-14U converter,
while the second panel connects to the first panel. Additional panels are
connected in the same way, one after another. The server identifies each panel on
the RS-485 network by its address.
At each end of the data line, both where the panel connects to the computer and
on the last panel in the network, a termination resistor of 100–120 Ω may be
required. Apply the resistor across the L1 and L2 connections.
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