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HIGH/LOW LIMIT OPERATION
If Hi.Lo is selected for OUT1, the unit will perform high/low limit
control. When power is applied the OUT1 relay is de-energized.
After 6.5 seconds self-test period, if the process is below the high
limit set point (HSP1) and above the low limit set point (LSP1), the
output 1 relay will be energized and OP1 indicator will go off. If the
process goes above the high limit set point or below the low limit set
point, the relay will be de-energized, the OP1 indicator will go on
and the display will show the process value. After the process is
within the normal operation range, and the RESET key is pressed or
the remote reset input is applied, the relay will be energized and the
OP1 indicator will go off.
OUT1 Relay
A
ON
OFF
Figure 1-6 High/Low Limit Operation
UM0L911C
B C
D
E F
A, B, C, D, E, F =Reset is applied
O1.HY= Output1 hysteresis
HSP1
HSP1
O1.HY
LSP1+O1.HY
LSP1
15
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