Specifications

Hardware Reference 29
C613-03023-00 REV P
Figure 16: Pin wiring diagram for an X.21 DTE transition cable
D50 SCSI-2 Male
(to device)
D15 Male
(to DCE)
Cable Shield
Insulating
Sheath
Notes:
(1) → Output from device; ← Input to device.
(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 31mm ± 3mm from rear of D50 SCSI-2 backshell.
(6) Applies to cable version 3.0 or later.
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