Connection of RS-232C Interface (V720-CD1D)
Section 4-6
4-15
4-6
Connection of RS-232C Interface (V720-CD1D)
Signal name
Symbol
Signal direction
Pin number
Input
Output
Maintenance ground
GR
–––
–––
Shield
Signal ground or common
retrace line
SG
–––
–––
5
Send data
SD
–––
OK
3
Receive data
RD
OK
–––
2
Request to send
RS
–––
OK
7
Clear to send
CS
OK
–––
8
Note
1.Ground the shielded wire on either the Controller side or the above host
computer side.
2.Internally short-circuit pins 7 (RS) and 8 (CS).
Connection to Host through IBM PC/AT or Compatible Computer, 9-pin Port
Connector Pin Arrangement
when Viewed from the Controller
Controller
9-pin male
cables with connectors
connecting device
DOS personal computer
9-pin female
shielded wire
Shield
Connector Pin Arrangement
when Viewed from the Controller
Controller
Host computer
Shield
Shielded wire