2
C
O N N E C T I O N S
J1 – Shunt Resistor Connections.
Two terminal pins are provided via the J1 rear connector
for installation of an external shunt resistor. Terminal connections are used to install a user
defined resistor as determined by the sensor’s calibration data sheet or pre-determined by
the user. When an externally installed resistor is used, the ANALOG CONTROL switch 5 is
required to be in the
External
position (Switch 5 DOWN).
Note:
The 377
0
unit comes with an internally installed 59K Ohm resistor, as standard, and
enabled when the front panel ANALOG CONTROL Switch# 5 is in the
Internal
position
(Switch 5 UP).
Note:
When a sensor has an integrated shunt resistor, the ANALOG CONTROL switch
setting needs to be in the External position and a shorting wire in place of the external
shunt resistor position. This provides the electrical path for the Calibration Sense line to
enable the sensor’s internal shunt resistor when the + or – Shunt Calibration rear terminals
or push buttons are activated.
SHUNT Resistor – User Provided
(Note: ANALOG CONTROL switch
5 must be in the External position)
External Shunt Resistor Connections
J1
SYNC
M / S ENABLE
TARE ENABLE
HOLD
TARE
LOGIC COM
R CAL +
R CAL -
SHUNT RESISTOR
SHUNT RESISTOR
NOTE:
Daytronic Shunt Calibration circuit, when activated, will place the Shunt resistor across
the + Sense Line (for positive shunt) or the – Sense Line (for negative shunt) with the
connection of the Sensor’s Calibration Sense line located on the J2 connector - which is
recommend to be connected to the + Signal line. When not activated, the Calibration Sense line
is buffered as to not affect the sensor’s operational characteristics.
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8
DC STRAIN GAGE PANEL METER
Model 3770
