3UG3501 datasheet(85/114 Pages) ETC2

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Monitoring Relays

7/85

Siemens LV 1 T · 2006

3UG Monitoring Relays for Electrical and Additional Measurements

Speed monitoring

■Overview

The 3UG30 51 monitoring relay is used together with a sensor to

monitor drives for underspeeding.

■Function

The underspeed monitoring relay operates according to the

principle of retriggerable OFF-delay. During the time (value) set

on the front panel, another pulse must arrive at input IN1 or IN2

to ensure that the output relay remains picked up. The

monitoring relay evaluates the rising edge of the signal, i.e.

a continuous signal is also recognized as a missing pulse. If the

retrigger pulse does not arrive, indicating a reduction in speed,

the output relay drops. In order to be able to start a drive, the

output relay remains picked up during the ON-delay time T, even

if the speed is still below the set value (motor starting override

time). The first pulse must come within this time.

The monitoring relay can be used for all functions where a

continuous pulse signal needs to be monitored (belt travel

monitoring, completeness monitoring, passing monitoring,

clock-time monitoring).

Speed monitoring without memory (NO MEMORY)

When the speed of the drive drops below the set value, the

output relay drops. It picks up again when the speed is greater

than the set value plus the fixed hysteresis.

Speed monitoring with memory (MEMORY)

When the output relay drops, this state remains stored even

when the speed reaches a permissible value again. The stored

state can be ended by a control signal at the reset terminal or by

interrupting the supply voltage for at least 200 ms.

■Technical specifications

1) Short-circuits without any contact welding acc. to

DIN VDE 0660 Part 200.

N S B 0 _ 0 0 9 6 5

A 1 / A 2

S e t v a l u e

H y s t e r e s i s

A c t u a l v a l u e

O u t p u t r e l a y

N S B 0 _ 0 0 9 6 6

A 1 / A 2

S e t v a l u e

H y s t e r e s i s

A c t u a l v a l u e

O u t p u t r e l a y

R e s e t

S t o r a g e ( M E M O R Y )

Type

3UG30/3UG35

Load capacity of the output relay

Rated operational current Ie

max. 8

AC-15/230 V

DC-13/24 V

DC-13/48 V

0.45

DC-13/60 V

0.35

DC-13/110 V

0.2

DC-13/230 V

0.1

Minimum contact load

5/17 V for a fault of 1 ppm

Output relay with DIAZED fuse1)

gl/Gg operational class

Electrical endurance

Operating cycles

1 x 105

Mechanical endurance

Operating cycles

2 x 106

Ambient temperature

During operation

°C

-20 ... + 50

During storage

°C

-30 ... + 70

Connection of conductors

Solid

mm²

2 x (0.5 ... 2.5)

Finely stranded, with end sleeves

mm²

2 x (0.5 ... 1.5)

Degree of protection

Terminals

IP20

Enclosures

IP40

Vibration resistance

acc. to IEC 60068-2-6

Hz/mm 10 ... 150/0.035

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