Changes
/* Description */
== Description ==
TEL-SERDB9 SERX4 Provides USB to Multiprotocol(RS-232, RS-485-Half Duplex, RS485-Full Duplex) serial connection (up to 4 Ports per TEL).
* Simple USB Connection protocol
USB <--> USB HUB <---> RS-232 / RS-485 (Port A) - Native DB-9 Port RS-232 / RS-485 (Port B) RS-232 / RS-485(Port C) RS-232 / RS-485(Port D)
RS-485 - Globally enable Termination resistor. - User Switchable
TEL-SERDB9 SERX4 is utilizing a USB2 interfaceMultiple TEL-SERDB9 SERX4 cards can be installed in a system
== Features ==
* Complete hardware design files are available
* Complete firmware is available
== Connection requirements ==
=== Pinout ===
{|
|-
| [[File:TEL-SERDB9_DB9_pinout_diagram.png|thumb|none|600px | DB-9 Pinout]]
| [[File:TEL-SERDB9_DB9_Switch_board location.png|thumb|none|273px | Switch Location Diagram]]
|}
=== Host interface ===
USB2
