RS485-signal-distribution.md

+# Distribution of RS485 Signals
+
+The CONV-TTL-RS485 board uses the Texas Instrument SN65HVD3088E
+low-power RS-485 transceiver.  
+This IC is the fastest in the range and is suitable for applications
+that requires signaling rates up tp 20Mbps.
+
+## RS-485 Signal characteristics
+
+## RS-485 signal distribution
+
+### Data rate and bus length
+
+### Bus loading
+
+## Termination
+
+The RS-485 differential lines are routed to and from the P2 connector of
+the motherboard. The tracks can be 100Ohm terminated, this is optional
+and a solid-state relay is used to activate this option.  
+Two dedicated dip switches on the motherboard can be used to activate,
+input or output termination separately. Note however that if termination
+is enabled on the input, then it will be enabled on all RS-485 input
+channel.  
+Similarly with output channels, if RS-485 termination is active, then
+this will apply to all output channels.
+
+he. RS-485 Signal characteristics in the CONV-TTL-RS485 board
+
+
+
+### Files
+* [diff_50Ohm_load.PNG](/uploads/e712ffff625520705c0f6838db0156dc/diff_50Ohm_load.PNG)
+* [diff_no_load.PNG](/uploads/2762711d23f17af720441ba0dc95c72d/diff_no_load.PNG)
+* [rs485-meas-setup.png](/uploads/5145850cf4f3b2a54dbe761903fddf9a/rs485-meas-setup.png)
+* [diff_no_load_2osci-chans.PNG](/uploads/63bb27f885c97a374548159bd359c3a3/diff_no_load_2osci-chans.PNG)
+* [rs485-transceiver-cablelength-vs-datarate.PNG](/uploads/46d4716183161b380671e54880af5e57/rs485-transceiver-cablelength-vs-datarate.PNG)
+* [rs485-bus-diagram.PNG](/uploads/31046265bcb993c21e99bd99257a8439/rs485-bus-diagram.PNG)
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