Connector Pin Assignments - junger C8702 Manual

digital audio
modular
processing system

Connector pin assignments

RJ45
Pin # Function
1
2
3
4
5
6
7
8
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.
Important Note! Junger Audio uses a default bit rate of 125 kbit/s and guarantees cable lengths of up to
300m if one connects a brc (broadcast remote controller). As an exeption for high density application with
C8942 and C8912 compact frames and C8491, C8492 and C8492(B) compact modules, the internal CAN
bus may operate with 1Mbit/s. In this case it is
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. The frame controller does not
support multiple frames anymore.
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. A decision must be taken how to deal with 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 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 turned off and
termination must be turned on on the brc 8x panel.
C8000
Frame Controller
LAN RJ45
Pin #
Tx + 1
Tx - 2
Rx + 3
4
5
Rx - 6
7
8
CAN
Function
CAN-H
CAN-L
GND
GND
not possible to use brc controllers!
C8702
D-Sub RS232
Pin # Function
1 DCD
2 Tx D
3 Rx D
4 DTR
5 GND
6 DSR
7 CTS
8 RTS
9 N.C.
Page 4/23