RS-232
↔
RS-422 INTERFACE CONVERTER
13
Figure 3-5. Signal Flow Diagram A.
RS-232
(Port is DTE)
RS-422
(Port is DCE)
12
Terminal Ready A (-)
30 Terminal Ready B (+)
DTR
20
CR8
(RS-422 DSR LED)
11
29
Data Mode A (-)
Data Mode B (+)
DSR
6
CR9
(RS-232 DSR LED)
CTS
5
9
27
Clear to Send A (-)
Clear to Send B (+)
CR4
(RS-232 CTS LED)
RTS
4
7
25
Request to Send A (-)
Request to Send B (+)
CR5
(RS-422 CTS LED)
4
22
Send Data A (-)
Send Data B (+)
TD
2
CR6
(RS-422 DATA LED)
6
24
Receive Data A (-)
Receive Data B (+)
RD
3
CR7
(RS-232 DATA LED)
CD
8
13
31
Receiver Ready A (-)
Receiver Ready B (+)
TXC
15
5
23
Send Timing A (-)
Send Timing B (+)
RXC
17
8
26
Receive Timing A (-)
Receive Timing B (+)
ETXC 24
17
35
Terminal Timing A (-)
Terminal Timing B (+)
Signal
GND
7
19
20
37
Signal GND
Receive Common
Transmit Common
* Note: The optional jumper is removed (factory default
RS-232 <--> RS-422 Signal Flow Diagram
(Arrows indicate the direction of signal flow.)
Chassis
GND
1
1
Chassis
GND
Optional Jumper
*
SW1 A
SW1 B
or Frame
GND
↔
