====== MOD-COM4 ======
The MOD-COM4 is a modular unit capable of up to 4 x RS232 ports, also configurable for RS422 and RS485.\\

===== Quick Reference Guide =====

The Modules Quick Reference Guide provides the basic information required to get started on a printable, black and white document that can be easily taken with you to a job site. [[http://www.commandfusion.com/docs/quick/QuickReferenceGuide-Modules.pdf|Find the Modules Quick Reference Guide here.]]


===== Ports =====

Front of the module 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 MOD-COM4 port configuration options, please see the [[hardware:cflink:com-module-cflink-documentation|MOD-COM4 CFLink documentation]].\\

==== Front 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 -

==== Rear Connector ====
The rear of every module contains a module port, used to connect the module into the modular controller base unit (DIN-MOD4, etc).\\
The pinout for this port is not published (as it has no benefit to any user).