RS-232 CFSound (JB1 jumpered as DTE) to PC (DTE)
The CFSound-IV can be connected with a null modem cable (or one-to-one cable with null modem
adaptor) between the CFSound and host PC when JB1 is configured for DTE:
G
N
D
+1
0
-
+
1
8
V
D
C
Power
Supply
Female
(To CFSound) From Back!
1
5
6
9
3 - RxD
2 - TxD
7 - RTS (optional)
5 - GROUND
9 - POWER
3 - TxD
2 - RxD
5 - GROUND
8 - CTS (optional)
JB
1
Female
(To CFSound) From Back!
1
5
6
9
D
TE
RS-485 Connection
The CFSound-IV can be used with RS-485 serial connections. The RS-485 Enable configuration item
must be turned on to control when the driver is enabled on the bus:
NOTE: Be sure to connect both the Ground of the PC or Host computer and the Ground of your +10
→ +18VDC Power supply together!
The RS-485 A+ and B- signals are terminated with a 100 ohm resistor between them. In addition, there is
a 10K pull-up resistor on the A+ signal to +3.3v and a 10K pull-down resistor on the B- signal to Ground, to
put the received data line in an idle state when there is no connection.
SERIAL
Pin #
Power Supply
CFSound
SIGNAL
6
A+
1
B-
5
GND
GND
9
+10 → +18VDC
+10 → +18VDC