2
T
RANSDUCER
C
ONNECTIONS
The Model 5M78 I/O CONNECTIONS are via non-removable screw terminals which will
accept wire sizes from AWG 12 to 26.
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 5M78
screw terminals - as a minimum. Table 2 denotes screw terminal assignments
Table 2 Model 5M78 Pin Assignments
I/O Connector Conditioner
Pin Screw Terminal
Line
Number Terminal Label Function
Top Rear 1 1 + EXC + EXCITATION
Top Rear 2 2 + SEN + SENSE
Top Rear 3 3 - EXC - EXCITATION
Top Rear 4 4 - SEN - SENSE
Top Front 1 1 + SIG + SIGNAL Input
Top Front 2 2 - SIG –SIGNAL Input
Top Front 3 3 CAL SEN CALIBRATION SENSE
Top Front 4 4
///
SHIELD
Bottom Front 1 1 Ano Out ANALOG Output
Bottom Front 2 2 SHP Shunt Positive
Bottom Front 3 3 SHN Shunt Negative n
Bottom Front 4 4 SYC SYNC - MASTER/SLAVE
T
RANSDUCER
C
ONNECTIONS
5M78.2
AC Strain Gage Conditioner
Module
5M78
Bottom Rear 1 1 Acom
Analog Common
Bottom Rear 2 2 Pcom Power Common
Bottom Rear 3 3 24 V 24 Vdc Power
Bottom Rear 4 4
///
SHIELD
SHIELD
Fig. 1 Model 5M78 Transducer Cabling
T
op Input Connectors
(viewed from front)
Rear Terminals
Front Terminals
Front Terminals
Rear Terminals
Bottom Power & Signal
Connectors
Analog Common
Power Common
24 Vdc Power Input
EXTRA WIRE
(paired with "CAL SENSE,"
UNCONNECTED at
Conditioner Connector)
+EXCITATION
–EXCITATION
CAL SENSE *
–SENSE
+SENSE
–SIGNAL
+SIGNAL
SHIELD
Master/Slave
Clock Sync Line
to/from other
modules
* CAL SENSE
when used with internal transducer
shunt resistor, wire CAL SENSE
line to transducer's CAL pin.
Internal Shunt resistor
must be shorted.
