====== CARD-COM4 ======
This card adds additional RS232 and RS422/485 connectivity to the [[hardware:solo|Solo controller]].\\
It features 2-4 configurable serial ports, exactly the same as the [[hardware:modules:mod-com4|MOD-COM4]] product.\\

===== Ports =====
The card has two 6-pin connectors, the top row and bottom row.\\
Each row can be configured as either:\\
  * 2 x RS232 without flow control
  * 1 x RS232 with flow control
  * 1 x RS485 half-duplex
  * 1 x RS485/422 full-duplex
Note that when using any RS232 mode in combination with RS485 or RS422 (any duplex type), the RS232 must be on ports 3 and/or 4 (bottom row).\\
RS232 can never be in ports 1 or 2 (top row) when using alongside RS485 or RS422 (bottom row).\\
\\
For more details on the configuration options, please see the [[hardware:cflink:com-module-cflink-documentation|MOD-COM4 CFLink documentation]] which is the same for the CARD-COM4.\\

==== Pinouts ====
Pinouts for the various modes each connector can be configured to are as follows:\\
{{:hardware:modules:com4-pinout.svg|}}

**2 x RS232 without flow control**
  - TX-1
  - Ground
  - RX-1
  - TX-2
  - Ground
  - RX-2

**1 x RS232 with flow control**
  - TX
  - Ground
  - RX
  - RTS
  - Ground
  - CTS

**1 x RS485 half-duplex**
  - Data + (B)
  - Ground
  - Not Connected
  - Data - (A)
  - Ground
  - Not Connected

**1 x RS485/422 full-duplex**
  - TX +
  - Ground
  - RX +
  - TX -
  - Ground
  - RX -