Schematic Overview Of The Rs-485 Circuit - Bausch Datacom DinBox PSTN Reference Manual

7.2

Schematic overview of the RS-485 circuit

JP2
/RXD
dT
1
/TXD JP7
3
/RXD
Bausch Datacom NV
DinBox PSTN Reference manual – V1.3
transmitter
JP6
1
A
~recEN
traEN
JP5
1 3
B
receiver
3
A
receiver
B
Y
transmitter
Z
15
JP4
560 E
560 E
JP8
JP10
560 E
560 E
JP11
47 E
47 E
120 E
9V1
4V7
JP3
47 E
47 E
120 E
9V1
4V7
JP9
IO 3
IO 2
IO 4
IO 1