Rs-232C Serial Interface Specifications; Interface Signals - Oki ML1120 Technical Reference Manual

RS-232C
SERIAL INTERFACE SPECIFICATIONS
I
NTERFACE SIGNALS
PIN SIGNAL
NO.
1 Protective Ground
2 Transmitted Data
3 Received Data
4 Request to Send
7 Signal Ground
11 Supervisory Send
Data
20 Data Terminal
Ready
5, 8 to —
10, 12
to 19,
21 to 25
NOTE
1. Connector pin arrangement for above:
13
25
Technical Reference Guide – Interface specifications > 28
CODE SIGNAL
PG —
TD From printer
RD To printer
RTS From printer
SG —
SSD From printer
DTR From printer
— —
1
14
(Viewed from interface cable side)
FUNCTION
Frame ground
Data from
printer
Data to printer
Signal to
indicate printer
cannot receive
data in printer
Busy/Ready
protocol
Signal ground
Signal to
indicate printer
cannot receive
data in printer
Busy/Ready
protocol
Signal to
indicate printer
cannot receive
data in printer
Busy/Ready
protocol
Unused