SIEMENS
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Siemens IC 10 · 2017
Relays
SIRIUS 3UG48 Monitoring Relays for Stand-Alone Installation for IO-Link
Current monitoring
10
■
Overview
SIRIUS 3UG4822 monitoring relays
The relays monitor single-phase AC (rms value) and DC currents
against the set limit value for overshoot and undershoot.
■
Benefits
•
Variably adjustable to overshoot, undershoot or range
monitoring
•
Freely configurable delay times and RESET response
•
Width 22.5 mm
•
Display and transmission of actual value and status messages
to controller
•
All versions with removable terminals
•
All versions with screw or spring-type terminals
■
Application
•
Overcurrent and undercurrent monitoring
•
Monitoring the functionality of electrical loads
•
Monitoring for broken conductors
■
Technical specifications
3UG4822 monitoring relays
The 3UG4822 current monitoring relays are supplied with power
through IO-Link or with an external voltage of 24 V DC and per-
form overshoot, undershoot or range monitoring of the current
depending on the parameterization. The devices are equipped
with a display and are parameterized using three buttons.
The measuring range extends from 0.05 to 10 A. For larger
AC currents the measuring range can be extended by using
commercially available current transformers. Using the adjust-
able transformer factor, the display of the measured primary
currents up to 750 A instead of the secondary currents
(max. 1 A or 5 A) is possible.
The rms value of the current is measured. The limit values for
overshoot or undershoot can be freely configured within this
range. If one of these limit values is reached, the output relay
responds according to the set principle of operation as soon
as the delay time
I
▲
Del/
I
▼
Del has elapsed. This time and the
ON-delay time onDel are adjustable from 0 to 999.9 s.
The hysteresis is adjustable from 0.01 to 5 A. The device can be
operated with Manual or Auto RESET and on the basis of either
the open-circuit or closed-circuit principle. You can decide here
whether the output relay is to respond when the supply voltage
U
s
= ON is applied, or not until the lower measuring range limit
of the measuring current (
I
> 50 mA) is reached. One output
changeover contact is available as a signaling contact, and
a semiconductor output is available in addition in SIO mode.
If Manual RESET is selected in the menu (Memory = Yes), the
switching relay remains in its current switching state and the
current measured value and the symbol for undershooting and
overshooting continues to flash, even when the measured vari-
able reaches a permissible value again. This stored fault status
can be reset by simultaneously pressing
the UP
▲
and DOWN
▼
keys for 2.5 s.
With Manual RESET through IO-Link it is possible in addition to
set whether error signals are to be deleted when the control sup-
ply voltage is switched off and on (as remote RESET) or whether
the signals are to be permanently saved even in a voltage failure,
with confirmation possible only through local RESET or via
IO-Link.
With the closed-circuit principle selected
upon application of the control supply voltage
Current overshoot
Current undershoot
L+/L-
= 0
Q off
Q on
11/12
11/14
>
,
!
Delay
onDelay
Hysteresis
IC01_00016
IC01_00017
L+/L-
= 0
Q off
Q on
11/12
11/14
<
,
!
onDelay
Hysteresis
Hysteresis
Delay
© Siemens AG 2016