Furuno Felcom 30, Installation Manual

Page: 35 / 55

28
ISDN connectors
Connector panel
1 2 3 4 5 6 7 8
RS-422
TX- TX+ RX- RX+
ON
48V DC
SYNC
ALARM
RS-232 A RS-232 B
USB
ISDN
ISDN
ISDN
TX+ TX- RX+ RX-
NMEA- NMEA+
5 4 3 2 1
9 8 7 6
5 4 3 2 1
9 8 7 6
1 8
8 1
ISDN
a2 RX+
a1 TX+
b1 TX-
b2 RX-
ISDN
equipment
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
ISDN
connector
2
RJ45
ISDN wall socket
ISDN wall socket
Ground to be continued
or interconnected
To next ISDN wall socket via
junction box, if required.
ISDN bus
from MCU
2 1
ON
4 5 3 6
2 1
ON
RJ45 RJ45
(TX+ TX- RX+ RX-)
8 1 8 1
Terminal Name 38VDC Signal
4 a1 - TX+
5 b1 - TX-
3 a2 + RX+
6 b2 + RX-
ISDN port
TX+
TX -
RX+
RX -
When the distance between the
CU and the last connection box
on an ISDN bus exceeds 10 m, the
termination resistors in the last box
must be incorporated by setting
both slide switches to position ON:
The switches in all other boxes
should be OFF (default setting).
The two RJ45 jacks are connected
in parallel.
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www.reelschematic.com