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PRESYS
Instruments
LATCH - makes each relay only again deactivate after the alarm condition has
passed, with the acknowledgment of an alarm condition by the operator: pressing the UP
key, when it is displayed the process variable in normal operating mode, until it reaches
the desired relay, and then press ENTER. If there is no alarm condition for this relay, it
will change state. Keep pressing the UP key to return to the operating mode. Note that
only appear relays configured with latch and only if they need acknowledgment to return
to normal.
DELAY - causes the relay to be activated only after a certain time interval defined
by the user. Figure 18 below illustrates the delay operation for a high-alarm. If the trip
function is enabled, you must set this value to 5.0 seconds to temperature input,
2.0 seconds to current input 4-20 mA or 1-5 V voltage.
SAFE - determines the security condition to relays. The security condition to
relays means that their coils are energized in no-alarm condition, and are de-energized in
alarm condition or in case of power failure. If the trip function is enabled for alarm 3 or 4,
configure SAFE as NO.
DISP - allows a flashing display indication (set BLINK) or switch the indication with
the mnemonic ALAR (set ALAR), when the instrument enters into alarm condition. To
disable the DISP option set NO.
Below is the adjustable range of the parameters shown in Figure 17.
Mnemonic
SP
HYST
delay for deactivate
DELAY
Operation
Page 26
Fig. 18 - Relay with delay
Parameter
alarm set point
alarm hysteresis
the relay
DMY-2030-Light-5S-Energy
Adjustable
Factory Value
Range
-1009 to 20019
0 to 250
0.0 to 3000.0
Units
50.0
EU
1.0
EU
0.0
s
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