Keithley 7011-S Instruction Manual page 35

Card Connections & /nm//arion
Typical connection techniques
All external circuitry, such as instrumentation and
DLJTs, that you wish to connect to the multiplexer card
must be terminated with a single 9&pin female DIN
coMecror. The following coxlnection techniques pro-
vide some guidelines and suggestions for wiring your
circui&y.
WARNING
Before beginning any wiring proce-
dures, make sure all power is off and
any stored energy in external circuit-
ry is discharged.
NOTE
External circuitry should be connected
(I
,7ed id only wirh the 7001's
pow-
e1
after the Model 7011 assembly is
in:;slled in the Model 7001 main-
frame. Installation is covered in para-
graph 3.5.
Output relays- The multi-pin connector card uses a
relay for each of the four output banks. These output
relays are normally open to prevent any hazardous
voltages (via the mainframe backplane) from appear-
ing cm the pins of the rw.le DIN connector. The output
relays will only close when the Model 7011~MTC-2 ca-
ble assembly is connected to card. If building you own
cable assembly, you must make sure that it shorts pins
la to lb of the card ccmnector (Figure 3-8) when it is
mated to the card. Shorting pins la to lb allows the
output relays to close.
Round cable assemblies -Figure 3-9 shows typical
round cable connection techniques using accessories
available from Keithley.
In Figure 3-9A,
connections
are accomplished using a
Model 7011 h4TC-2 cable and a Model 7011~MTR bulk-
head connector. The two-meter round cable is termi-
nated with a 96-pin female DIN connector at each end.
This cable mates directly to the multi-pin connector
card and to the bulkhead connector. The bulkhead con-
nector has solder cups to allow direct connection ia in-
strumentation and DUT. Figure 3-10 provider rhe
pinout for the bulkhead connector.
In Figure 3-9B, connections are accomplished using a
Model 7011 MTC-2 cable assembly that is cut in half.
The 96-pin female DIN connector on one end of the ca-
ble mates directly to the multi-pin connector card. The
unterminated end of the cable is wired directly to in-
strumentation and DUT. The other half of the cable as-
sembly could be used for a second switching card.
In Figure 3-9C, connections are accomplished using a
custom-built cable assembly that consists of a Model
7011~KlT-R connector and a suitable round cable. Hita-
chi cable part number N28!?'-P/D-50TAB is a 5O-con-
ductor cable. Two of these cz~les can be used to supply
100 conductors.The connector has solder cups to ac-
commodate the individual wires of the unterminated
cable. Figure 3-11 provides an exploded view of the
connector assembly and shows how the cable is con-
nected. The connector end of the resultant cable assem-
bly mates directly to the multi-pin connector card. The
unterminated end of the cable assembly is wired di-
rl?crly to inshumen tation and DIJT.
3-8