NCR 7800 - Cable Requirements

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DTR
RI
14115
Host
NCR
7800
25-P in D -Shell
C onnector
9-P in or 25-P in
D -Shell C onnector
GRD
DSR
CTS
RTS
RD
TD(SD )
1
14
13
25
W iring C hart
View ed from
Wire Side
(F e m a le
C onnec tor)
NCR 7800
R S-232 C onnector
Term s
GRD
TD
RD
RTS
CTS
DSR
DTR
RI*
25-pin D -shell
C onnector
Pin N um bers
7
2
3
4
5
6
20
22
* R I and D S R are held high by the N C R 7800.
D istances Less Than 50 Feet (15.2 m )
N ote: N am es are in reference to D TE (i.e. TD
im plies the N C R 7800 receives on this line).
9-pin D -shell
C onnector
Pin N um bers
5
3
2
7
8
6
4
9
H ost C onnector
If 9-pin
D -Shell
5
3
2
7
8
6
4
9
If 2 5 -p in
D -Shell
7
2
3
4
5
6
20
22
14116
DCE
DTE
DCE
DTE
Short R ange
M odem
Short R ange
M odem
XM T +
XM T -
G
RCV +
RCV -
XM T +
XM T -
G
RCV +
RCV -
8
1
RJ-45
C onnector
8
1
Term inal Block
C onnections
Host
NCR
7800
D istances G reater Than 50 Feet (15.2 m )
but generally less than 1.9 m iles (3.0 km )
RJ-45
C onnections
N o C onnection
Receive (+)
Transm it (+)
Transm it (-)
R e c e iv e (-)
G round
N o C onnection
7, 8
6
5
4
3
2
1
N o C onnection
Receive (+)
Transm it (+)
Transm it (-)
R e c e iv e (-)
G round
N o C onnection
7, 8
6
5
4
3
2
1
Pin
N um ber
RJ-45
Assignm ent
RJ-45
Assignm ent
Pin
N um ber
Cable Requirements