Allied Telesis AR Series Hardware Reference Manual page 65

Hardware Reference
Figure 30: Pin wiring diagram for an RS-232 DTE 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, e.g. UL2789 28AWG. Twisted pairing must be
1-26, 2-27, 3-28, etc.
(3) D25 connector shells to be metallised and fully shielded 360°.
(4) Standard cable length is 2.05m ± 0.05m.
(5) Ferrite to be fitted to cable no more than 25mm from rear of D50 SCSI-2 backshell.
(6) Cable version 4.0.
C613-03031-01 REV C
Table 31: Transition cable pin wiring diagrams.
Physical Interface Standard
RS-232 DTE
RS-232 DCE
V.35 DTE
V.35 DCE
X.21 DTE
X.21 DCE
Cable Shield
TD 12
RD 2
RTS 14
CTS 3
DSR 4
SG 1
CD 5
TC 10
RC 8
LL 16
DTR 13
RL 15
FGND 21
FSELA 22
FGND 46
FSELB 47
Pin 25
Ferrite
Pin 50
Pin Wiring Diagram
Figure 30 on page 65
Figure 31 on page 66
Figure 32 on page 67
Figure 33 on page 68
Figure 34 on page 69
Figure 35 on page 70
Insulating
Sheath
1
2
3
4
5
6
7
8
15
17
18
20
21
Pin 1
Cable
Pin 14
D25 Male — Pin View
D25 Male
(to DCE)
Shield
TD (103)
RD (104)
RTS (105)
CTS (106)
DSR (107)
SG (102)
CD (109)
TC (114)
RC (115)
LL (141)
DTR (108)
RL (140)
Pin 13
Pin 25
A50R232T
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