Installation guide

Connecting to a DSSI Subsystem 4-9
The DSSI buses are configured physically by the cable. Check your cables
before beginning installation. If you need additional cables, see Table 4-3.
The overall physical bus length is limited to 24 m (80 ft). Therefore, sys-
tems and devices on the DSSI bus must reside close to each other. One ex-
ternal DSSI cable is required for each bus connection between systems;
two cables are required to connect two systems and an expander cabinet.
Removable terminators must be properly installed. See the DSSI VAX-
cluster Installation and Troubleshooting Manual and the KFMSA Module
Installation and User Manual for specific instructions on where and how to
install the terminator(s).
Table 4-3 DSSI Cable Kits
P/N Qty—Length Function
CK-SF200-LM
1 108 in (2.7 m)
1 70 in (1.8 m)
For VAX to SF connections. Con-
tains two cables (BC21Q-09 and
BC21R-5L). One kit is required
for each DSSI bus used (maxi-
mum of two kits per KFMSA).
CK-KFMSA-LJ
2 48 in (1.2 m) Internal cable set, connecting
XMI backplane at KFMSA
adapter to XMI I/O bulkhead on
the VAX 6000 system. Used
when the VAX 6000 is the end
node of a DSSI subsystem.
CK-KFMSA-LN
2 48 in (1.2 m) Internal cable set, connecting
XMI backplane at KFMSA
adapter to XMI I/O bulkhead on
VAX 7000/10000 systems. Used
when the VAX 7000/10000 is not
an end node of a DSSI subsys-
tem.
For more information:
DSSI VAXcluster Installation and Troubleshooting
Manual
KFMSA Module Installation and User Manual