DayTronic 3500 Series, Instruction Manual

Page: 26 / 122

2.8
2
S
ETUP
: C
ONNECTIONS AND
P
OWERUP
2.a.7 C
ONNECTING AN
AC S
TRAIN
G
AGE
T
RANSDUCER TO THE
M
ODEL
3578
As shown in Fig. 2(a), the Model 3578 AC Strain Gage Conditioner's Analog
Input Board mates with a special CONDITIONER CONNECTOR. This connector
allows direct solder-terminal attachment of cable leads. The connector's internal
solder terminals are labelled 1 through 10 and A through L. The connector is
"keyed" by small plastic inserts embedded between certain terminal-pin pairs,
each of which matches a slot in the conditioner's Analog Input Board. This pre-
vents the connector from being inadvertently attached upside-down.
Open the connector housing by removing the four screws that hold it together.
Secure the cable by means of one of the internal clamp bars.
The "shield" wire of the transducer cable should be soldered to the exposed ter-
minal of the L-shaped GROUND LUG located under the head of one of the con-
nector's two captive screws. This will ensure direct shield contact with the 3578’s
metal case.
2.a T
RANSDUCER
C
ONNECTIONS
: M
ODEL
3578
A
B
C
D
E
F
H
J
K
L
1
2
3
4
5
6
7
8
9
10
+SIGNAL
CONDITIONER CONNECTOR
–EXCITATION
+EXCITATION
–SIGNAL
–SENSE
+SENSE
CAL SENSE
SHIELD
Connector pins shown as viewed
from rear (cable) side of
connector.
Ground Lug
Fig. 11(a) Model 3578
Transducer Cabling: 4-Wire
Cabling (under 20 ft. in length)
A
B
C
D
E
F
H
J
K
L
1
2
3
4
5
6
7
8
9
10
CONDITIONER CONNECTOR
+EXCITATION
+SENSE
SHIELD
Connector pins shown as viewed
from rear (cable) side of
connector.
Ground Lug
+SIGNAL
–EXCITATION
–SIGNAL
–SENSE
CAL SENSE
Unconnected wire
(Paired with "CAL SENSE")
Fig. 11(b) Model 3578
Transducer Cabling: 8-Wire
Cabling (20 ft. or longer)