Allied Telesis AR Series Hardware Reference Manual page 80

80
Figure 39: Pin wiring diagram for an X.21 DCE transition cable to an AMPLIMITE 50-way connector.
D50 SCSI-2 Male
(to router)
Connect to backshell
←
←
→
→
→
Pin 1
Pin 26
D50 SCSI-2 Male — Pin View
Notes:
(1) → Output from router; ← Input to router.
(2) Use shielded cable with twisted pairs. 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 1.1.
Cable Shield
1
TD 12
37
RTS 14
39
RD 2
27
CD 5
30
TXC 20
45
FGND 21
FSELC 23
Pin 25
Ferrite
Pin 50
D15 Female
(to DTE)
Insulating
Sheath
1
8 Ground
4 Receive
11
5 Indication (A)
12
2 Transmit
9
3 Control
10
6 S (Clock)
13
Pin 8
Cable
Pin 15
D15 Female — Pin View
AR Router
Shield
(A)
(B)
(B)
(A)
(B)
(A)
(B)
(A)
(B)
Pin 1
Pin 9
A50X21C
C613-03031-01 REV E