1-27
1.E.1 GENERAL CONSIDERATIONS
TRANSDUCER CABLING
AND
CONDITIONER CARD SETUP
1.E
If you're using a 40-pin “AA”-card connector like that shown in Fig. 1.7, make sure
the shield wire of each attached cable is securely connected to the respective
SHIELD terminal (which is internally connected to one of the connector housing’s
two ground lugs).
d. USE OF THE MODEL 10AX-2 AUXILIARY
EXCITATION CARD
The Model 10AX-2 supplies two channels of regulated, sensed ±12 V-DC ±2%
power (up to 20 mA) to external transducers. Though most often used to power
high-output DC-to-DC LVDT’s, this card may also be used with other transducers
within the above voltage and current range.
The Model 10AX-2’s I/O CONNECTOR mates with Daytronic CONDITIONER CON-
NECTOR No. 60322, shown in Fig. 1.5, above. Standard pin assignments for the
I/O Connector are given in the table below.
2-wire cabling is to be used for each 10AX-2 channel when the cable is under 20
feet in length. In this case, the channel’s +SENSE and –SENSE lines are tied to the
corresponding EXCITATION lines
at the CONDITIONER CONNECTOR. The EXCI-
TATION lines should be paired for shielding.
4-wire cabling is to be used for each 10AX-2 channel when the cable is 20 feet or
longer. In this case, the channel’s +SENSE and –SENSE lines are tied to the cor-
responding EXCITATION lines
at the transducer. The EXCITATION and SENSE
lines should be separately paired for shielding.
In either wiring configuration, +SIGNAL and –SIGNAL lines from the transducer
are connected to the associated SIGNAL CONDITIONER CARD, as shown in the
respective subsection of
Section 1.E.2, below.
Table 1.1 Model 10AX-2 Pin Assignments
I/O Connector
Pin Channel Line
Number Number Function
11+EXCITATION
A1–EXCITATION
21+SENSE
B1–SENSE
62+EXCITATION
F2–EXCITATION
72+SENSE
H2–SENSE
4, D, 5 — POWER COMMON
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