Interface connector – Sanyo SRP-270 User Manual
Page 30
Interface Connector
Serial Interface (RS-232C)
Pin No.
Signal name
Direction
Function
1 FG
-
Frame
Ground
2 TXD
Output
Transmit
Data
3 RXD
Input
Receive
Data
6
DSR
Input
Data Set Ready
7 SG
-
Signal
Ground
20
DTR
Output
Data Terminal Ready
Serial Communication Interface (Example)
Printer Host(DTE ex 8251)
FG
FG
TXD TXD
RSD RSD
DSR DTR
DTR DSR
CTS
RTS
S.G S.G
Serial Interface (RS-485)
Pin No.
Signal Name
Direction
Function
1 FGND
-
Frame
Ground
2 SD2
Output
3 SD1
Output
Send Data
4 RD2
Input
5 RD1
Input
Receive Data
7 SGND
-
Signal
Ground
8
9
DR2
DR1
Output
Same as DTR(RS-232)
10
11
CS2
CS1
Input
Same as DSR(RS-232)