Specifications

30 Port Interface Card
C613-03023-00 REV P
Figure 17: Pin wiring diagram for an X.21 DCE transition cable
D50 SCSI-2 Male
(to device)
D15 Female
(to DTE)
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 1.1 or later.
1 Shield
8 Ground
4 Receive (A)
11 (B)
5 Indication (A)
12 (B)
2 Transmit (A)
9 (B)
3 Control (A)
10 (B)
6 S (Clock) (A)
13 (B)
Connect to backshell
1
← TD 12
37
← RTS 14
39
→ RD 2
27
→ CD 5
30
→ TXC 20
45
FGND 21
FSELC 23
Pin 26 Pin 50
Pin 1 Pin 25
D50 SCSI-2 Male — Pin View
Pin 15
Pin 9
Pin 8 Pin 1
D15 Female — Pin View
Ferrite
Cable
A50X21C