2.b C
ONNECTION OF
E
XTERNAL
E
XCITATION
S
OURCE
An external excitation supply furnished by the user can be optionally applied to each
active AA30-4 channel, in place of the card's on-board 3280-Hz, 3-VAC (rms) refer-
ence. The external excitation must be 2 to 6 kHz, 2 to 3.5 V-AC (rms sine wave), refer-
enced to “center wire” (Signal Common).
As shown in Fig. 5, below, the excitation source's positive lead will connect directly to
the “SLAVE IN” terminal of each channel to which it is applied, with the negative lead
connecting directly to the “CENTER WIRE” terminal. It is strongly recommended that
all AA30-4 channels be “slaved” to the same sine-wave signal source, in order to pre-
vent harmonic “beating” with another frequency.
As explained in Section 3.a, an appropriate jumper setting must be made for each
channel that is being “slaved” to an external excitation source.
C
ONNECTIONS
AA30-4.
7
Q
UAD
LVDT C
ARD
AA30-4
+
–
* SIGNAL COMMON
EXTERNAL
EXCITATION:
2 - 3.5 V-AC (rms);
2 - 6 kHz
CENTER WIRE*
–SIGNAL
SHIELD
+EXCITATION
+SENSE
SLAVE IN
–SENSE
–EXCITATION
+SIGNAL
Channel
1
CENTER WIRE*
–SIGNAL
SHIELD
+EXCITATION
+SENSE
SLAVE IN
–SENSE
–EXCITATION
+SIGNAL
Channel
2
.
.
.
Fig. 5
Connection of External
Excitation Source
Summary of Contents for System 10
Page 31: ...GETTING YOUR SYSTEM 10 ON THE AIR SB 2 FOR A SIZED MAINFRAMES...
Page 67: ...GETTING YOUR SYSTEM 10 ON THE AIR SB 2 FOR B SIZED MAINFRAMES...
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