Service Information
5-3
5.3.3 Multiplexer card connections
The following information summarizes methods that can be
used to connect test instrumentation to the two connector
cards. Detailed connection information is provided in Sec-
tion 3.
Model 7015-S
Instrumentation can simply be hard-wired
directly to the screw terminals of the connector card. Jumper
wires should be kept as short as possible.
Model 7015-C
One method to make instrument connec-
tions to the multiplexer card is by hard-wiring a 96-pin fe-
male DIN connector then mating it to the connector on the
Model 7015-C. Input and output shorting connections can
also be done at the connector. The connector in the Model
7011-KIT-R connection kit (see Table 3-3) can be used for
this purpose. Pin identification for the connector is provided
by Figure 3-8.
CAUTION
After making solder connections to a
connector, remove solder flux as ex-
plained in paragraph 5.2. Failure to
clean the solder connections could result
in degraded performance preventing
the card from passing verification tests.
Before pre-wiring any connectors or plugs, study the follow-
ing test procedures to fully understand the connection re-
quirements.
5.3.4 Channel resistance tests
Perform the following steps to verify that each relay is clos-
ing properly and that the channel resistance is within speci-
fication.
1. Turn off the Model 7001/7002 if it is on.
2. Turn on the Model 2001, and allow it to warm up for one
hour before making measurements.
3. Connect all input terminals of Bank A together to form
one common terminal, as shown in Figure 5-1.
4. Set the Model 2001 to the 2k
Ω
range, and connect the
four test leads to the INPUT and SENSE jacks.
5. Short the four test leads together and enable REL. Leave
REL enabled for the entire test.
6. Connect INPUT HI and SENSE HI of the Model 2001
to the common terminal (jumper on Bank A inputs). It is
recommended that the physical connections be made at
inputs 1 and 10 of Bank A, as shown in Figure 5-1.
7. Connect INPUT LO and SENSE LO to the HI (H) ter-
minal of Bank A.
8. Install the Model 7015 in slot 1 (CARD 1) of the Model
7001/7002.
9. Turn on the Model 7001/7002, and program it to close
Channel 1!1 (Bank A, Input 1). Verify that the resistance
of this path is <210
Ω
.
10. Open Channel 1!1 and close Channel 1!2 (Bank A, Input
2). Verify that the resistance of this path is <210
Ω
.
11. Using the basic procedure in steps 9 and 10, check the
resistance of Bank A HI (H) terminal paths for Inputs 3
through 10 (Channels 1!3 through 1!10).
12. Turn off the Model 7001/7002, and move the INPUT
LO and SENSE LO test leads to the LO (L) terminal of
Bank A.
13. Repeat steps 9 through 11 to check the LO (L) terminal
paths of Bank A (Channels 1!1 through 1!10).
14. Repeat the basic procedure in steps 1 through 13 for
Banks B through D (Channels 1!11 through 1!40).
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