Hardware Reference
79
C613-03031-01 REV E
Figure 38: Pin wiring diagram for an X.21 DTE transition cable to an AMPLIMITE 50-way connector.
D50 SCSI-2 Male
(to router)
D15 Male
(to DCE)
Cable Shield
Insulating
Sheath
Notes:
(1)
→
Output from router;
←
Input to router.
(2) Use shielded cable with twisted pairs, e.g. UL2789 28AWG. Twisted pairing must be
1-26, 2-27, 3-28, etc.
(3) D15 connector shells to be metallised and fully shielded 360°.
(4) Standard cable length is 2.05m
±
0.05m.
(5) Ferrite must be fitted to cable no more than 25mm from rear of D50 SCSI-2 backshell.
(6) Cable version 3.0.
1
Shield
8
Ground
2
Transmit
(A)
9
(B)
3
Control
(A)
10
(B)
4
Receive
(A)
11
(B)
5
Indication (A)
12
(B)
6
S (Clock)
(A)
13
(B)
Connect to backshell
1
→
TD
12
37
→
RTS
14
39
←
RD
2
27
←
CD
5
30
←
RXC
8
33
Pin 26
Pin 50
Pin 1
Pin 25
D50 SCSI-2 Male — Pin View
Pin 9
Pin 15
Pin 1
Pin 8
D15 Male — Pin View
Ferrite
Cable
A50X21T
