DayTronic System 10 - 2.b Special Cabling; Ungrounded Frequency Source

TRANSDUCER CONNECTIONS AA41-2/4.5
DUAL / QUAD FREQUENCY CARD AA41-2 / AA41-4
Channel
3
Channel
4
Channel
1
Channel
2
40-Pin Connector
(attaches to rear I/O
Connector of AA41 Card)
SHIELD
+SIGNAL
+SIGNAL A
+SIGNAL B
–SIGNAL
+5V
POWER COM
–5V
NO CONNECTION
NO CONNECTION
SHIELD
+SIGNAL
+SIGNAL A
+SIGNAL B
–SIGNAL
+5V
POWER COM
–5V
NO CONNECTION
NO CONNECTION
Fig. 2 Model AA41
Connector Assembly Board
See
Fig. 4
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–5V
SHIELD
+SIGNAL
+SIGNAL A
+SIGNAL B
–SIGNAL
+5V
POWER COM
+SIGNAL
–SIGNAL
+
–
Frequency
Source
10K
See Note on
Pull-Up Resistor
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AA41-4: Channel 1, 2, 3, or 4:
AA41-2: Channel 1 or 2:
AA41 CONDITIONER CONNECTOR
Fig. 3 Model AA41 Transducer Cabling
Fig. 3(a) Cabling to a
Grounded Frequency Source
2.b SPECIAL CABLING
Fig. 4 summarizes three kinds of special AA41 connections you might need to
establish for a given AA41 channel:
UNGROUNDED FREQUENCY SOURCE
For floating-source inputs and inputs from zero-velocity sensors, where the –SIGNAL
is not grounded at the frequency source,
the –SIGNAL terminal should be tied directly
to POWER COMMON. This connection is also shown in Figs. 3(b) and 3(c).