Junger Audio C8702 User Manual

digital audio
modular

C8000

processing system

Frame Controller

features

• TCP/IP over Ethernet interface for C8000 frames

• Native CAN bus interface

• WEB interface for set up and monitoring of C8k modules

• EmBER plus protocol for 3rd party applications

• Optional SNMP agent

• Front side RJ45 Ethernet connector

• Front side RJ45 CAN connector

• Front side 9-pin serial (RS232) service connector

• Front side INIT button

• Front side STATUS LED

• Three tier security schema with password checking

block diagram

C8702

RS232

LAN

CAN

SW1

clock battery

+

Coldfire - embedded

controller

A B C D

mode switch

ON DIPON DIP

DEV0

DEV1

frame
address

CAN bus

SW2

Frame address

lines

CAN-

DEV2

TERM

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installation

SW1 #1 <A> must be OFF
Set SW1 #2 <B> to ON (all other to OFF) if only one power supply is installed
Set SW1 #3 <C> to ON (all other to OFF) if the Frame Controller is installed in a C8942 frame
Set SW1 #3 <C> and <D> to ON (all other OFF) if the Frame Controller is installed

in a C8912 frame

Set SW2 #1 - #3 <DEV 0> / <DEV 1> / <DEV 2> to ON
Set SW2 #4 <CAN-TERM> to ON (terminate the CAN bus) if no sync module is installed.

If a brx 8x remote panel is connected, it must be off as well.

Location of labels and switches on the C8702 module.
The default IP address label is located on the “Coldfire” chip of the controller module

and on the front panel of the module.

While the MAC address is printed on a label here :

C8702

7E 83

GND

AD 20

02 08

10.110.145.105

Default IP

MCF5282CVT66

DEV 0
DEV 1
DEV 2

CAN-TERM

SW2

SW1
A
B
C
D

The FAIL LED is flashing red if a power failure has been detected on the carrier board.

ON DIPON DIP

FAIL

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technical specifications

Controller module:
Micro controller MCF8250 “Coldfire”
FLASH 8 Mbyte
RAM 16 Mbyte
RTC DS 1306
OS eCos

External connectors:
LAN (RJ45) 10/100 Mbit Ethernet
RS232 (Sub-D / 9pin) Controller serial interface 1
CAN (RJ 45) CAN 1.1 (125kBit/sec)

INIT The INIT button
resets (warm start)
initialize (factory default)

STATUS The status LED lights yellow while booting and green when operating
Factory settings:

IP address 10.110.xxx.yyy where xxx and yyy is factory calculated from the

MAC address of the Ethernet interface
Subnet mask 255.255.0.0
Gateway No entry

Controller ID 0
Frame address 0
CAN termination OFF

General
back plane connector ref. to DIN41612, 64pin, a+b, male
power supply +5V DC
consumption approx. 300 mA
dimensions 3RU, 4HP, 160mm depth

connector pin assignments

C8702

RJ45 LAN

Pin # Function
1 Tx +
2 Tx ­3 Rx +
4
5
6 Rx ­7
8

RJ45 CAN

Pin # Function
1 CAN-H
2 CAN-L
3
4 GND
5 GND
6
7
8

Sub-D RS232

Pin # Function
1 DCD
2 TxD
3 RxD
4 DTR
5 GND
6 DSR
7 CTS
8 RTS
9 N.C.

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set up of the module

The communication with the C8k modules is done via the CAN bus, i.e. the Frame Controller “talks” to
the C8k modules via CAN bus while external applications communicate via TCP/IP over Ethernet with the
C8702. The CAN bus is a simple two-wire differential serial bus, it operates in noisy electrical
environments with a high level of data integrity. Its open architecture and user-definable transmission
medium makes it extremely flexible. Capable of high-speed (1 Mbits/s) data transmission over short
distances (40 m) and low-speed (5 kbits/s) transmissions at lengths of up to 10,000 m, the multi-master
CAN bus is highly fault tolerant, with powerful error detection and handling designed in.

Junger Audio uses a bit rate of 125 kbit/s and guarantees cable lengths of up to 300m.
Very important is the termination of the transmission medium to avoid signal degradation by reflections.

Setting the frame ID of a C8k frame:

• The frame address switches DEV0 – DEV2 must be set to ON
Termination of the CAN bus:

• The CAN bus must be terminated by two 120Ω resistors on both ends. The frames have one integrated

terminator on the back plane so decision must be taken how to deal wit the second one. You may either
use the Sync interface or the Frame Controller to terminate the bus. If the CAN connector of the C8702
is used for an external remote controller (e.g. the brc), the bus must be terminated on the remote
controller (at the far end).

Important Note! The CAN-TERM switch must be set to OFF if it is terminated on the Sync-Module.
If no Sync-Module is installed (in case of a MADI / SDI or AES interface operates in Master-Mode),
the CAN bus must be terminated by SW2-4. If a brx 8x panel is connected it must be set off and
termination must turned on at the brc 8x panel.

Setting the mode switch for single power supply operation:

• if there is only one power supply installed (e.g. the C8911 frame has only one PS)

the mode switch “B” must be set to ON in order to turn power fail monitoring off.

Setting the mode switch for C8942 high density frames:

• For the C8942 frames the mode switch “C” must be set to ON to turn sync fail monitoring off

(this frame type has no central sync source) and fan monitoring on.

Setting the mode switch for C8912 dual power supply 19" 1RU frames:

• For the C8912 frames the mode switches “C” and "D" must be set to ON to turn fan monitoring on.
Reset the C8702:

• press the INIT button briefly at any time and the Frame Controller will reboot immediately.
Important Note! Rebooting the Frame Controller has no effect on audio processing.

Initialize the C8702 to factory default settings:

• Approx. 10 sec. after power is turned on or after pressing the INIT button briefly (Reset function), the

STATUS LED lights yellow. Now you may press the INIT button and hold it firmly until the
STATUS LED flashes three times. This is an acknowledge that the C8702 has been initialized to factory

default settings (you may also hold down the INIT button at any time until the STATUS LED flashes
three times).

C8702

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setting the IP address

Important Note! If you are not familiar with the Internet Protocol, you must contact an administrative
person of your IT department for aid.

There are two principal ways to change the IP configuration. Firstly you can use the so called console
interface or secondly you may use a Web Browser.

1. Connect with a PCs COM port:

* use a physical or virtual (by a serial < > USB adaptor) COM port
* connect it by a 1:1 cable to the RS232 9-pin connector
* run a terminal program (115.2-8-N-1, no handshake)
* select that COM port
* press <ENTER> :

C8702

You will get a similar window that shows the momentary IP configuration and a Configuration Menu.
The layout depends on the screen settings and the OS. The content of that menu may vary from
different Frame Controller firmware version.

1.1 Select : “Change Network configuration” <2> <ENTER>

You must set an IP address and the subnet mask. If you skip the “Netmask”
the IP address will not be changed. Gateway address is optional and may be skipped.

1.2. Select : “Reboot” <8> <ENTER>
Press small <y> and <ENTER> to start the reboot process

2. Connect the C8702 via an Ethernet cross over cable to a PC:

2.1 Change the network setting of the PC

The PC must be given an IP address of the address room of the C8702 default IP address.
The factory default IP address is printed on a label at the controller module (see installation).
The subnet mask of the factory default address is 255.255.0.0.

Important Note! If the C8702 has an unknown IP configuration you may initialize it to factory default
settings (see above) this will restore the factory default IP configuration.

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2.3 Open a browser and enter the default IP address in the URL field :

C8702

2..4 On the web site click on the spanner tool

This opens the “SYSTEM CONFIG” tab of the Frame CONTROLLER setup.

2.5 Enter the desired NETWORK configuration:

2.6 Press <CHANGE NETWORK CONFIGURATION>

2.7 Reboot the C8702 :

In order to make the IP configuration permanent you must reboot the frame controller.

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Frame Controller

web based GUI

The GUI is based on common web technologies so you can display it nearly everywhere.
External Ethernet based access to the Junger devices is maintained by a dedicated 32Bit
communication processor that is part of the C8702 Frame Controller module.
The communication processor does not control the module parameters directly. It transfers commands
and data from and to a module control processor which on the other hand controls the module
parameters as well as GPI/Os. The module control processor and the communication processor both
communicate via the CAN bus internally. Therefore the external communication is somewhat shielded
from the audio processing by this two tier approach. I.e. you can update the firmware of the
Frame Controller without disturbing the audio processing.

C8702 Frame Controller

CAN

communication processor

C8702

LAN

RS232

MCF5282CVT6

6

Example C8k module

control processor

* LevelMagic
* AudioFail
* MixMatrix

module

DSP

c8k frame internal CAN bus

Audio I/O
Bus
selector

The communication processor runs a HTTP and an UDP server. Optionally you may activate a Telnet,
and an Ember+ server. As an payable option you may activate a SNMP agent as well.

Over a serial 1:1 connection, (RS232: 115200, 8, N, 1, no protocol) you may gain access to the
consol interface (see IP set up above). It offers low level communication for administrative, service
and testing purposes. The functions available from the console interface may very from
different Frame Controller firmware versions.

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