BNC/TC-2095 Rack-Mount Adapter Installation Guide
4
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Connecting Field Signals
♦
BNC-2095
The BNC-2095 has 32 BNC connectors, one for each channel of a
SCXI module. Each BNC connector is labeled with the corresponding
channel number. The center pin of the BNC connector is the CH+, and
the outer shield is the CH– of each channel. The CH– is isolated from
the chassis ground, so you can use it for ground-referenced differential
signals. To ensure CH– is isolated from chassis ground, do not use bias
resistors.
Caution
Do
not
force the BNC connector on the BNC-2095. If you have difficulty making
the connection, completely remove the connector and try again.
Connect the BNC connector of the cable to the BNC connector of the
BNC-2095 by aligning and inserting the connector and turning the
cable connector clockwise.
♦
TC-2095
The TC-2095 has 32 universal thermocouple miniconnectors that you
can use to connect a thermocouple to each channel of the SCXI
module. Each connector is labeled with the corresponding channel
number. The miniconnector indicates the positive and negative
terminals.
Caution
Do
not
force the miniconnector into the socket. If you have difficulty inserting the
miniconnector, check that the polarity is correct.
Connect the thermocouple wire to the TC-2095 by inserting the
miniconnector into the socket. Each miniconnector consists of two
spades of different widths. The differing widths guarantee correct
polarity if both connectors are correctly wired.
Both contacts of the thermocouple miniconnector are made of copper.
This could cause offset errors in T-, R-, and S-type thermocouple
measurements because each of these types of thermocouples has
one copper contact. Only one contact forms a cold junction with
T, R, and S-type thermocouples.
