Siemens SIRIUS 3UG4 Equipment Manual page 283

Device variants
3UG4625
3UG4633
3UG4641
3UG4651
Setting: I
1)
You will find further information on the ON-delay time in the "Functionality" chapter for each
monitoring relay.
Possible indications on the display:onDel
(Warning) threshold for undershoot
The device monitors a measured value for undershoot.
The measured value can be parameterized as a threshold or as a warning threshold (on the
3RR22 and 3UG4583 devices only) for undershoot.
The warning threshold defines the switching threshold of the relevant output relay prior to
tripping by measured value undershoot.
If the set threshold is undershot, the output relay changes its switching state after expiry of the
set delay time, and an IO-Link message may be sent. If the measured value has reached the
relevant set hysteresis value, the output relay (reset response is set to autoreset) will
immediately revert to its original state and a new IO-Link message may be sent.
Further response depends on the set reset response (see "Reset response" parameter).
You can find information on the switching behavior of the output relays in the "Functionality"
chapters of the relevant monitoring relays.
Possible indications on the display:
• Current undershoot: I▼ (threshold), I!▼(warning threshold)
• Voltage undershoot: U▼ (threshold), possibly U!▼ (warning threshold)
• Speed undershoot: rpm▼ (threshold), possibly rpm!▼ (warning threshold)
• Power factor undershoot: φ▼ (threshold), possibly φ!▼ (warning threshold)
• Active current undershoot: I
Possible LED indications:
• Level undershoot: Yellow LED lights up as soon as the output relay picks up, depending on the
functional principle selected
• Insulation resistance undershoot: Red LED lights up continuously
• Voltage undershoot: Red LED lights up continuously
(Warning) threshold for overshoot
The device monitors a measured value for overshoot.
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Start of the ON-delay possible for:
"Power‑ON"
Yes
Yes
Yes
Yes
▼ = OFF
res
▼ (threshold), possibly I
r
Automatic reset
No
No
Yes
1)
No
!▼ (warning threshold)
r
Parameters
Manual reset
Yes
No
Yes
1)
No
1)
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