Rockwell Automation T7420A_AF ICS Regent+Plus Analog Input Modules 60Hz Rejection and Fast Response - Manual (Page 9)

Analog Input Modules (T7420A, AF)
P D - 7 0 2 3 M a r - 0 6
9
Table 2. Mode Selection.
Jumper Single-Ended Differential
J251 n
J252 n
J501 n
J502 n
J503 n
J504 n
J505 n
J701 n
Table 3. Input Range Selection.
Jumper 0 to +10 -10 to +10 +1 to +5 0 to +5 -5 to +5
J551 n
J552 n n
J553 n n
J601 n n n
J602 n n
J651 n n
J652 n n n
J653 n n n
J654 n n
Input Low-Pass Filters
Two rows of jumper connections (J506 and J507) allow
selection of onboard capacitors to create single-pole low-pass
input filters on the board. Jumpers are placed on these
connections to select either single-ended or differential filters
as appropriate.
In single-ended mode, the filtering is done with respect to the
appropriate AREF1 (or AREF2) input line. A 10K Ohm
resistor is in series with each analog input line (this resistor is
also a part of the over voltage protection system for the
module as well), and the capacitor is on the multiplexing side
of the resistor. There are four rows of eight pins labeled J506
and J507, for single-ended mode filtering install jumpers
across row J506 and row J507 (for a total of 16 jumpers).