Central Control Unit

Introduction

The D-Cerno CU is the heart of the system. It controls all delegate units and can interconnect to other systems via the external audio connections.

The system operates in a standalone mode and controls a maximum of 50 units. Configuration can be done via the integrated menu.

Controls and indicators

All controls are done via touch panel by means of an intuitive user interface menu (see "Introduction to the main menu" on page 1). A user can activate or select a control or menu item by touching one of the symbols underneath the display.

External Connections

Figure 1-6 Connections available on the back side of the CoCon central unit

  1. +48V DC power connector
  2. Four RJ45 ports to connect up to max 50 delegate units (max. 25 units per branch or loop). The green LED indicates that a signal is detected without errors (devices are detected). The yellow LED indicates that no signal is detected (no devices are connected).
    For more information please use the power calculation tool available on Sharefile.
  3. Two RJ45 ports. Two RJ45 shielded connectors for a connection with 2 slave central units when the central unit is master in a coupled environment.

    In case a larger number of units are required the system can be extended with 2 extra central units in master / slave configuration. The maximum of microphone units is 150 (obtained by using 3 central units).

  4. LAN connector: for web server connection (D-Cerno CU-R only)

    Through the LAN connector it is possible to connect the central unit to the local network. This makes it possible to control the recording and configuration by web browser on your PC or mobile device.

  5. Two unbalanced RCA audio output connectors to extract analog audio floor signal. The green LED lights up when there is an output signal of > -40dBV present.
  6. One unbalanced RCA analog audio input connector to add external signals to the floor. The red LED lights up when there is an overload of the input signal (signal > +9dBV).
  7. One balanced XLR analog audio connector to add external signals to the floor. The red LED lights up when there is an overload of the input signal.

    The AUX In connection on the central unit has an XLR 3 Female connector. So a cable with an XLR 3 Male connector should be used to insert an external signal.

    Figure 1-7 XLR pin assignment: Pin 1: Shield, Pin 2: Signal 2, Pin 3: Signal -

  8. Headphone connector at the front of the central unit: for headphone monitoring.
  9. Two USB connectors can be found at the front of the D-Cerno CUR. These allow the user to record the meeting in WAV or MP3 format.

    The USB memory sticks have to be formatted with the FAT file system. NTFS is not supported by the D-Cerno CUR. To guarantee a correct recording we advise to use USB 2.0.

    Before plugging in a USB, please check the amount of free recording space.

Start up

Before switching on the central unit, please make sure all units are correctly connected to the Central Unit.

To start the D-Cerno CUR there are two options. The first option is to press and hold the on/off button for 3 seconds. A second option is to automatically let the D-Cerno CUR start when the power supply is connected. For this option you need to physically change a dipswitch on the electronic circuitry inside the D-Cerno CUR. This procedure is described in the appendix of this manual in "D-Cerno CUR startup options" on page 1.

When the red ON/OFF led is blinking the meeting can be started and settings can be adjusted. USB and network functionalities (recording, web browser) are available after 15 seconds, when the red ON/OFF stops blinking and turns off.

Then the image depicted on Figure 1-8 appears on the screen and the device is ready to record.

Figure 1-8 USB and network functionalities enabled

To switch off the device, press and hold the ON/OFF switch for 3 seconds.