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Description
The Ultra SlimPak G108 is a
DIN rail mount, DC voltage or
current input limit alarm with
dual setpoints and two contact
closure outputs. The field configurable
input and alarm functions offer
flexible setpoint capability.
Input voltage spans from 10mV
to 200V and input current spans
from 1mA to 100mA can be field
configured. Bipolar inputs are
also accepted.
The
G108 is configurable as a single
or dual setpoint alarm, with
HI or LO trips and failsafe
or non-failsafe operation. Also
included are adjustable deadbands
(0.25 to 5% of full scale input)
for each setpoint, a 24VDC voltage
source (isolated from line power)
for transducer excitation, and
a flexible DC power supply which
accepts any voltage between
9 and 30VDC.
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Operation
The field configurable G108
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 low deadband
(see Figure 1). 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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