RM 4200D


Discontinued Products

RM 4200D2018-06-01T15:54:30+02:00

Product Discontinuation of RM4200D

wichtig Introduced in 2002, and having been produced for 11 years, the RM4200D DSP Frame was discontinued in December 2012.

RM4200D Control Modules had already been discontinued as of Dec 31, 2011.

The discontinuation concerns all devices (article numbers) starting with RM420-.

Further delivery is only possible if the modules are in stock or can be remanufactured. Please note that remanufacturing is neither provided for every type of module nor on short notice.

Please contact your DHD distributor or, if applicable, check the DHD.audio web shop for available modules, available spare parts and current stock status.


Modules and Spareparts

Frequently Asked Questions

How to enable Windows users without administrative rights to use the DHD Communication Server2016-12-14T09:41:22+01:00

Every DHD software application which exchanges data with a device or a software, needs the DHD Communication Server (DHDCS) for this communication. This software administrates the entire communication between DHD systems in the network and the related applications on the PC. Each DHD application in the following list contains an entity of the DHDCS, which is extracted on the start of the application, in case no DHDCS or an older version of the DHDOS is installed on the PC:

  • Toolbox5
  • Toolbox4
  • Toolbox45
  • DHD Operation Server (DHDOS)
  • DHD Maintenance (DHDMT)
  • RM420-015 TFTConfig
  • RM420-550 Routing Software
  • RM420-552 Setup Manager
  • RM420-553 Remote Control Software
  • RM420-555 Bus Assign
  • RM420-556 Fader Label Changer

(This list is not being updated and might be incomplete!)

After extraction, first the DHDCS is started and afterwards the actual application starts. On exiting the application, the DHDCS is closed automatically.

The DHDCS is only working correct automatically if the logged-in Windows user holds administrative rights for the PC on which one or several of the applications mentioned above are running.
Please follow these steps to get the DHDCS working correctly for other users:

  • Log in as administrator at the respective workstation (Windows Login).
  • Create an empty folder (e.g. C:\DHDCS).
  • Copy the “DHDCS.exe” file into this directory and run it manually from there once. This will bind the DHDCS to the directory.
  • Give full access rights for this directory and the DHDCS.exe to all users working with the above mentioned DHD software applications.

Since the DHDCS version 1.90.13 it is possible to run the DHDCS as non-administrator. However, this is not recommended, because in this case the DHDCS is not able to send Ping messages into the network and this can cause problems concerning the establishment and monitoring of TCP/IP connections.

Until further notice DHD recommends to use PCs with Microsoft Windows XP to operate DHD software products.

Emulate analog and digital peak program meters2016-12-14T09:40:42+01:00

You can set the properties of the peak program meters of the TFT displays with the aid of the Toolbox4 / Toolbox5 configuration software. Choose the according device in the project tree of the Toolbox, open the sub-branches of the “Logic System” entry and select “Level Detection”.

Please enter the following values to emulate an analog peak program meter with an integration time of 10 ms, according to the standards DIN 45406 and IEC 268-10 (PPM, Type I), respectively:

  • Attack = 2 ms
  • Release = 0.7 s

Please use the following values to emulate a digital peak program meter:

  • Attack = 0 ms (or 1 ms if integration time is required)
  • Release = 0.7 s
Why are the filter settings of the DHDCS logging not saved?2016-12-14T09:39:51+01:00

The DHD Communication Server (DHDCS) does not save the filter settings (DHDCS > “Options” menu > “Filter Settings” tab). That means, after restarting the DHDCS all filter options are deselected.
This is done for security reasons, so that possibly occurring error messages and other important messages will not be suppressed permanently.

Calibrating RM4200D fader modules2016-12-14T09:38:59+01:00

The faders (Penny & Giles PGFM3200/-/M/-/E/I/Z/X, Specification D460667) of the modules RM420-020MW and RM420-029MW need to be calibrated. This is already done by DHD during the manufacturing process.

Calibrating is especially important after changing the faders of the modules RM420-020M and RM420-029M from “plastic” faders (Penny & Giles PGFM8100/D/M/—-/F, Specification D468105) to “metal” faders (Penny & Giles PGFM3200/-/M/-/E/I/Z/X, Specification D460667).

Proceed as follows for calibration of the fader modules:

  • Move all faders of the respective module to 0dB (as accurately as possible).
  • Open the Toolbox4* configuration software.

[* Calibrating will be possible in Toolbox5 in another way soon.]

  • Press the F7 key or choose the entry Maintenance of the View menu to open the maintenance window.
  • Select the desired module in the list on the left-hand side of the maintenance window.
  • Choose the entry Send CAN Block of the Protocol menu.
  • Find out the serial number of the processor module.

The serial number of the processor module can be found in the maintenance window behind each module, identified by PN:. In this example it is “12783” for the chosen module.


This decimal number needs to be converted in a hexadecimal number. E.g.: decimal 12783 = hexadecimal 31EF.

  • Enter the following command: 01ED[processor module serial number as HEX number],5 and click on Send. For the chosen module of this example, the command results as following: 01ED31EF,5.


Connecting a TFT Display to an RM4200D after Updating it to the Series 52 Firmware Generation2016-12-14T09:36:55+01:00

If you update your RM4200D to the Series 52 firmware generation, it is necessary to exchange the Communication Controller. Instead of the RM420-850, you need an RM420-852/853 controller module. If your console contains a TFT display, you need to rewire it after the controller exchange.

The following diagram shows the conventional wiring of the TFT screen of an RM4200D console equipped with an RM420-850 Communication Controller.

Click on the diagram to enlarge it.

After the update to the Series 52 firmware generation, the TFT display must be connected to the Communication Controller module in the following way.


Click on the diagram to enlarge it.

Please find detailed information on the wiring of the RM420-852 and RM420-853 controller modules in the 52/MX Manual and in the 52/MX Installation Guide.
Which fiber-optic cables can be used for the DHD MADI modules?2016-12-14T09:47:17+01:00

Please find all fiber-optic cables in the following PDF file, that are siutable to use with DHD MADI modules and which cable type can be used for the individual modules.

pdf Fiber Optic Cables

Fader knob colour of motorized RM4200D fader modules2016-12-14T09:15:12+01:00

In general it is possible to replace the fader knobs of the RM4200D fader modules with coloured knobs. However, this is not possible for modules with motorized faders. The fader knobs of the motorized faders need to be conductive to be able to recognize fader touches. These conductive fader knobs are currently only available in silver.

Why is it not possible to use Log Levels in the DHDCS for the logging of RM4200D systems?2016-12-14T09:14:20+01:00

A contextual menu appears if you right-click on a device in the DHD Communication Server. In this menu you can activate and deactivate the logging for the selected device. Depending on the DHDCS version, several Log Levels might be provided in this menu. However, these options are greyed out (not useable) for RM4200D devices (Toolbox4 firmware generation).
The various Log Levels can be used for the logging of 52/RM4200D (Toolbox5 firmware generation), 52/MX and 52/XR systems.

What’s the difference between RM420-015, RM420-015B and 52-4015A?2016-12-14T09:19:38+01:00

The RM420-015B replaces the RM420-015. All orders will be changed automatically.
The only difference is the power supply. The RM420-015B is supplied by Power over Ethernet using a power supply with integrated Power over Ethernet inserter (PSA16U480POE). The socket for the 48V power supply at the display is removed.
If you order a 52-4015A, a 52-3015A and a PSA16U480POE together, you will receive the same hardware kit as in item RM420-015B.

Please find further information in the following document.

pdf  TFT Display Differences

What to do if the DHD Software does not run properly under Windows 7?2016-12-14T09:12:00+01:00

DHD Software might not run correctly under Windows 7 right away. This may particularly apply to software like Toolbox4/Toolbox 4.5.

In order to be able to use the software anyway, it is necessary to change the compatibility settlings for the program.

Right-click the program icon, hit Properties, and then click on the Compatibility tab. Activate “Run this program in compatibility mode for:“. Select “Windows XP (Service Pack 3)“. Activate “Run as administrator” and confirm with OK.

The program should run properly now.

For further information please see the following link on the Microsoft website: http://windows.microsoft.com/en-US/windows7/Make-older-programs-run-in-this-version-of-Windows

If the above steps are not successful, you might, under certain conditions, be able to run the program in “Windows XP” mode. This mode is a Microsoft option which needs to be additionally installed for the Windows 7 Professional and Windows 7 Ultimate versions. (For further information and system requirements regarding this option, please read http://www.microsoft.com/windows/virtual-pc/default.aspx )


The following parts of the RM4200D manual are available online. Please find the release date in the upper left corner of the manual view.

Furthermore: A quick and fast introduction into upgrading an existing RM4200D with a Series 52 Controller.

Quickguide RM4200D/Series 52 Upgrade
(English Version)
2009/07/01      (html)
Quickguide RM4200D/Series 52 Upgrade
(German Version)
01.07.2009      (html)

(english version)
Subject to change without notice!

This part of the RM4200D manual contains the following information:

  • Overview about the key fetures and main applications.
  • Basic design principles.
  • List of currently available modules.
  • List of other accessories and services.

pdf Systemreferenz
27/03/2006,08:52 8.46 Mb

(german version)
Subject to change without notice!

pdf System reference
25/06/2006,01:00 8.44 Mb

(english version)
Subject to change without notice!

This part of the RM4200D manual contains the following information:

  • Specifications, Datasheets, Installation notes.
  • Network specifications.
  • Monitoring the system.

pdf Configuration Guide
28/03/2006,09:48 8.71 Mb

(english version)
Subject to change without notice!

pdf Konfigurationshandbuch
28/03/2006,09:58 8.67 Mb

(german version)
Subject to change without notice!

This part of the RM4200D manual explains the use of the configuration software “Toolbox4”. This program is to be used for the configuration of all system functions and for adjusting these functions to their specific use.

pdf Installation Guide
30/05/2006,11:34 10.34 Mb

(english version)
Subject to change without notice!

This part of the RM4200D manual contains all the information you need when installing the system. It includes:

  • Pin-outs for all connectors of the RM4200D.
  • Wiring schematics for different modules.
  • Layout for XLR adapter panels.
  • Wiring examples for typical applications.
  • Electrical specifications.
  • Colour codes for cables.

pdf Handbuch Anwendungssoftware
26/10/2005,10:03 6.74 Mb

(german version)
Subject to change without notice!

pdf Application Software Manual
26/10/2005,10:40 6.73 Mb

(english version)
Subject to change without notice!

This part of the RM4200D manual contains the operating manual for different DHD applications.
This book does not contain the instructions for the configuration software “Toolbox 4”. You find them in part “Configuration Guide”.

pdf External Modules
26/09/2006,10:03 615.96 Kb

(english version)
Subject to change without notice!

This part of the manual contains

  • the installations and operation guide for the RM420-015 TFT Display.
DHD Fader Modules / Fader Types
(English Version)
2009/11/13   3 638 b   (zip)
Fiber Optic Cables for DHD MADI modules
(English Version)
2008/09/04   608 Kb   (pdf)

If you want to integrate the talkback modules RM420-027 into an RM4200D talkback matrix, additionally to the Toolbox4 software you need the Toolbox45. The necessary steps of the configuration within the Toolbox45 software are explained in the following document:

Setting up an RM4200D Talkback Matrix with RM420-027 Talkback Modules
(English Version)
2006/11/21   1.39 Mb   (pdf)
Declaration of Conformity
(English Version)
2010/12/22   20 Kb   (pdf)
MidiControl Software Manual
(English Version)
2009/08/21   1.29 Mb   (pdf)
MidiControl Software Handbuch
(German Version)
21.08.2009   1.30 Mb   (pdf)
I/O Modules Specifications
(English Version)
2011/09/22   3.76 Mb   (pdf)
 xls RM4200D connection chart 10/02/2005,09:17 44.00 Kb
 pdf RM420-063 DSP-Frame mit 30 Slots 01/11/2004,09:24 550.04 Kb
pdf RM420-XLR-AA RJ45/XLR Adaptor Panel (analog/analog) 14/03/2005,07:33 276.30 Kb

pdf RM420-XLR-DD RJ45/XLR Adaptor Panel (digital/digital) 14/03/2005,07:46 270.43 Kb

pdf RM420-XLR-AD RJ45/XLR Adaptor Panel (analog/digital) 14/03/2005,07:40 270.43 Kb

Following, you can find drawings of the frames and modules of the Mixing & Routing System RM4200D. The drawings are packed in a ZIP file.
Please notice, that the following ZIP file is not updated regularly. Hence, it must not include all currently available frames and modules.
<!–You can find all drawings in the RM4200D List of Modules (online version), where you can download them separate by the different frames and modules.–>

RM4200D Drawings

2009/04/15   3.86 Mb   (zip)