Description
The Ultra Slim Pak G128 is a
DIN rail mount, thermocouple
input limit alarm with input
terminal cold junction compensation
(cjc), dual setpoints and two
contact closure outputs. The
field configurable input and
alarm functions offer flexible
setpoint capability. There are
up to six temperature ranges
available for each thermocouple
type to ensure accuracy and
maximize setpoint resolution.
The
G128 is configurable as a single
or dual setpoint alarm, with
HI or LO trips, upscale or downscale
thermocouple burnout detection
and failsafe or non-failsafe
operation. Also included are
adjustable deadbands (0.25 to
5% of full scale input) for
each setpoint and a flexible
DC power supply which accepts
any voltage between 9 and 30VDC.
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Operation
The field configurable G128
limit alarm setpoints can be
config- ured for HI or LO, failsafe
or non-failsafe operation. Each
of the setpoints has a respective
HI or LO deadband. In a tripped
condition, the setpoint is exceeded
and the appropriate red LED
will illuminate. The trip will
reset only when the process
falls below the HI deadband
or rises above the LO deadband.
For proper deadband operation,
the HI setpoint must always
be set above the LO setpoint.
In failsafe operation, the relay
is energized when the process
is below the HI setpoint or
above the LO setpoint (opposite
for non-failsafe). In the failsafe
mode, a power failure results
in an alarm state output.
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