Serial Interfacing (Rs-422A - Oki MICROLINE 591Elite User Manual

Serial Interfacing (RS-422A)

To construct a cable for an RS-422A serial configuration you will need:
DC-37P equivalent 37- pin plug, shell equivalent to DC-C1-J16
Beldon (or equivalent) SHIELDED cable with twisted pair conductors. Must be
UL and CSA approved. The cable MUST be shielded.
The printer has a 37-pin DC-37S receptacle.
Pin description
Pin no Signal
1 Shield
3* Supervisory
send data
21 Supervisory
send data
4 Send data
22 Send data
6 Receive
data
24 Receive
data
7* Request to
send
25 Request to
send
9 Clear to
RS. Printer
27 Clear to
Code Direction
SHILD —
SSD From
printer
SSD From
printer
SD From
printer
SD From
printer
RD To printer
RD To printer
RS From
printer
RS From
printer
CS+ To printer
CS- To printer
Connection Function
— Cable shield
A-A' Signal to indicate
printer cannot
receive data in
B-B' Ready/Busy
protocol
A-A' Data from printer
B-B'
A-A' Data to printer
B-B'
A-A' Signal to indicate
printer cannot
receive data in
B-B' Ready/Busy
protocol
A-A' Reply signal to
send transmits data
after confirming
B-B' this signal as a
Space
C – 7