10A40.
4
T
RANSDUCER
C
ONNECTIONS
CONDITIONER CONNECTOR (No. 60322)
SHIELD
Connector pins shown as
viewed from rear (cable)
side of connector
1
2
3
4
5
6
7
8
9
10
Ground Lug
10K
A
B
C
D
E
F
H
J
K
L
POWER
COMMON
–EXCITATION*
+SIGNAL
+EXCITATION
Zero-
Velocity
Sensor
See Note on
Pull-Up Resistor
* This is the sensor's "COMMON" line.
Fig. 1(c) Cabling to
Zero-Velocity Sensors
10A40
F
REQUENCY
C
ARD
2.b S
PECIAL
C
ABLING
Fig. 2 summarizes three kinds of special 10A40 connections you might need to estab-
lish:
U
NGROUNDED
F
REQUENCY
S
OURCE
For a floating-source input and input from a zero-velocity sensor, where the –SIGNAL
is not grounded at the frequency source, the –SIGNAL pin (
Pin C
) should be tied
directly to POWER COMMON (
Pin 2
or
5
). This connection is also shown in Figs. 1(b)
and 1(c), above.
E
LIMINATION OF
DC O
FFSET
The 10A40's input channel is supplied with two capacitive-coupled inputs (
Pins E and
F
of the rear I/O Connector provide 0.1- and 10-microfarad capacitance, respectively).
These special inputs may be used with either floating or grounded configurations;
they would not normally be used with zero-velocity sensors requiring 10-V excitation
(see Fig. 1(c)).
Fig. 2 shows how the larger (10-µF) capacitive coupling can be used to eliminate any
positive or negative DC offset that exists for a 10A40 channel's frequency signal. Sim-
ply connect the +SIGNAL line from the frequency source to the 10-µF pin (
Pin F
),
instead of to the SIGNAL pin (3). The capacitor is here in series with the +SIG-
NAL input and allows only AC to pass.
S
UPPRESSION OF
H
IGH
-F
REQUENCY
N
OISE IN
L
OW
-F
REQUENCY
I
NPUT
False triggering can sometimes occur, especially at the low-frequency input range,
because of stray pickup of frequencies outside the common-mode range. Capacitive
coupling of the frequency input to ground can in such cases serve to suppress
unwanted signal noise. This noise suppression is always recommended when using a
MAGNETIC PICKUP as the frequency source.
Summary of Contents for System 10
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Page 67: ...GETTING YOUR SYSTEM 10 ON THE AIR SB 2 FOR B SIZED MAINFRAMES...
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Page 234: ...10A48 6 THIS PAGE INTENTIONALLY BLANK 10A48 FLOW CARD...
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Page 252: ...10A63 2 6 THIS PAGE INTENTIONALLY BLANK 10A63 2 DUAL DC VOLTAGE CARD...
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Page 320: ...10A74 4C 18 THIS PAGE INTENTIONALLY BLANK 10A74 4C QUAD DC STRAIN GAGE TRACK HOLD CARD...
Page 342: ...10A96 8 THIS PAGE INTENTIONALLY BLANK 10A96 AMPLIFIED ACCELEROMETER VIBRATION CARD...
Page 362: ...AA30 4 12 THIS PAGE INTENTIONALLY BLANK AA30 4 QUAD LVDT CARD...
Page 374: ...AA41 2 4 12 THIS PAGE INTENTIONALLY BLANK AA41 2 AA41 4 DUAL QUAD FREQUENCY CARD...
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