====== TCP sockets and serial control interfaces ======

The DHD External Control Protocol can be used on TCP/IP or serial interface to control the DHD devices from external systems.

The following table shows the availability of these interfaces dependent on the various frame/controller types:

^    ^  Protocol Interface  ^^^^
^  //Frame Type//  ^  //Controller Type//  ^  RS232  ^  RS422  ^  TCP  ^
^  RM4200D\\ DSP Frame  ^RM420-850|1 port on RM420-850 controller\\ + 1 to 3 ports on each RM420-851 DSP Controller (max. 4 ports)|  -  |  max. 10 sockets<sup>**1**</sup>  |
^  RM4200D\\ DSP Frame  ^RM420-852|1 to 3 port on each RM420-851 DSP Controller (max. 3 ports)|1 port\\ Only on RM420-852B / RM420-853B!|  max. 10 sockets<sup>**2**</sup>  |
|:::|**RM420-853**|:::|:::|:::|
|  **XR Router**  |**52-6850**|1 port\\ 52-5862 RS232/RS232 card required|1 port\\ 52-5860 RS232/RS422 card required!|  max. 10 sockets<sup>**2**</sup>  |
|:::|**52-6851**|:::|:::|:::|
|  **XS Core**  |**52-1801**|1 port on XS Core|  -  |  max. 10 sockets<sup>**2**</sup>  |
|:::|**52-1804**|:::|:::|:::|
|  **XC Core**  |**52-7400**|1 port on XC Core|  -  |  max. 10 sockets<sup>**2**</sup>  |
|:::|**52-7402**|:::|:::|:::|
|:::|**52-7403**|:::|:::|:::|
|  **XD Core**  |**52-7440/7450**|max. 2 ports on 52-7450 Controller|max. 2 ports on 52-7450 Controller|  max. 10 sockets<sup>**2**</sup>  |
|:::|**52-7441/7450**|:::|:::|:::|
|:::|**52-7442/7450**|:::|:::|:::|
|  **XS2 Core**  |**52-1810**|1 port on XS2 Core|  -  |  max. 10 sockets  |
|:::|**52-1830**|:::|:::|:::|
|  **XC2 Core**  |**52-7423**|1 port on XC2 Core|  -  |  max. 10 sockets  |
|:::|**52-7420**|:::|:::|:::|
|:::|**52-7410**|:::|:::|:::|
|  **XD2 Core**  |**52-7440/7456**|max. 2 ports on 52-7456 Controller|max. 2 ports on 52-7456 Controller|  max. 10 sockets  |
|:::|**52-7441/7456**|:::|:::|:::|
|:::|**52-7442/7456**|:::|:::|:::|

<sup>1</sup> max. 4 sockets possible when using Firmware Version 05.05.27...05.06.01

<sup>2</sup> max. 5 sockets until Firmware Version 7.04.06

<WRAP center round info 80%>
**Note**\\  Please check module documentation for electrical specifications and pin assignment on RS232 and RS422 interfaces.
</WRAP>