2
T
RANSDUCER
C
ONNECTIONS
The Model IL78A I/O CONNECTIONS are via non-removable screw terminals which will accept wire
sizes from AWG 16 to 30. NOTE: The recommended transducer cabling would be eight wire,
individually shielded, twisted pair - wired as indicated (Fig. 1) Sense lines must be connected at the
transducer (as recommended) or at the IL78A screw terminals - as a minimum. Table 2 denotes
screw terminal assignments
TRANSDUCER CONNECTIONS IL78A.2
AC Strain Gage Conditioner
Module
IL78A
Fig. 1 Model IL78A Transducer Cabling
Table 2 Model IL78A Pin Assignments
I/O Connector
Conditioner
Terminal
Line
Screw
Terminal
Label
Function
1
2
3
4
5
6
7
8
Analog Output
SHP
SHN
Sync
Analog Common
Power Common
+ 24 Vdc
Shield
+ Signal Output
Shunt positive
switch input
Shunt negative swithc input
Master / Slave Sync I/O
- Signal Output
Power Supply Common
11 - 28 Vdc Input Power
Earth ground
1
2
3
4
5
6
7
8
+
Excitation
+
Sense
-
Excitation
-
Sense
+ Signal
- Signal
Cal Sense
Shield
+
Sensor Power
+
Sensor Power Sense
-
Sensor Power
-
Sensor Power Sense
+ Signal from Sensor
- Signal from Sensor
Calibration Shunt Sense
Earth ground
J1
J2
7 Wire confirguration (
recommended
)
4 twisted pair, shielded wire be used.
Paired as follows:
+ & - Excitation
+ & - Sense
+ & - Signal
Cal Sense and unused wire
Shield at the instrument only
4 Wire confirguration
2 twisted pair, shielded wire be used.
Paired as follows:
+ & - Excitation
+ & - Signal
Shield at the instument only
Sense lines
must
be connected at the
instrument
