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Monitoring Relays

3RS10, 3RS11 Temperature Monitoring Relays

Relays, digitally adjustable to DIN 3440

7/92

Siemens LV 1 T · 2006

■Overview

The 3RS10/3RS11 temperature monitoring relays can be used

for measuring temperatures in solid, liquid and gas media. The

temperature is sensed by the sensor in the medium, evaluated

by the device and monitored for overshoot or undershoot or for

staying within an operating range (window function).

The 3RS10 40, 3RS20 40, 3RS11 40 and 3RS21 40 relays

comply with the requirements of DIN 3440 as temperature

monitors; the 3RS10 42 and 3RS11 42 relays comply with the

requirements of DIN 3440 as temperature limiters. The relays are

also an excellent alternative to temperature controls in the low-

end performance range (2 or 3-point closed-loop control).

■Technical specifications

1) Not for NTC B57227-K333-A1 (100 °C: 1.8 k; 25 °C: 32.762 k).

2) 2-wire connection of resistance sensors with wire jumper between T2 and T3.

3) See Catalog LV1, Accessories, 3RP15 Solid-State Timing Relays.

Type

3RS10 40/3RS10 42/3RS20 40

3RS11 40/3RS21 40

3RS11 42

General data

Width

Operating range

0.85 ... 1.1 x Us

Rated power

W/VA

< 4/7

Auxiliary circuits

Contacts

1 CO + 1 CO + 1 NO

Rated operational currents Ie

• AC-15 at 230 V AC, 50 Hz

• DC-13 at:

- 24 V AC

- 240 V AC

0.1

DIAZED fuse

gl/Gg operational class

Electrical endurance

AC-15 at 3 A

100000

Mechanical endurance

Mechanical operating cycles

30 x 106

Tripping units

• Measuring accuracy at 20 °C ambient temperature

(T20)

2 K, 1 digit

5 K, 1 digit

7 K, 1 digit

• Reference point accuracy

5 K

• Deviations due to ambient temperature

in % from measuring range

0.05 °C per K deviation from T20

• Measuring cycle

500

• Hysteresis settings

- for temperature 1

1 ... 99 Kelvin, for both values

Adjustable delay time

0 ... 999

Sensor circuits

• Typical sensor circuits

- PT100

Typical 1

- PT1000/KTY83/KTY84/NTC

Typical 0.2

• Open-circuit detection

Yes1)

Yes

• Short-circuit detection

Yes

• 3-wire conductor connection

Yes2)

Enclosures

Environmental influences

Permissible ambient temperature

°C

-25 ... +60

Permissible storage temperature

°C

-40 ... +80

Permissible mounting position

any

Degree of protection acc. to EN 60529

Terminals: IP20; Cover: IP40

Rated insulation voltage Ui

(pollution degree 3)

V AC

300

Conductor cross-section

• Screw-type connection

M 3.5 (standard screwdriver, size 2 and Pozidriv 2)

- Solid

mm2

1 x (0.5 ... 4)/2 x (0.5 ... 2.5)

- Finely stranded, with end sleeve

mm2

1 x (0.5 ... 2.5)/2 x (0.5 ... 1.5)

- AWG conductors, solid or stranded

AWG

2 x (20 ... 14)

- Tightening torque

0.8 ... 1.2

• Spring-loaded terminal

- Solid

mm2

2 x (0.25 ... 1.5)

- Finely stranded, with end sleeve

mm2

2 x (0.25 ... 1)

- Finely stranded, without end sleeve

mm2

2 x (0.25 ... 1.5)

- AWG conductors, solid or stranded

AWG

2 x (24 ... 16)

- Corresponding opening tool

8WA2 8073)

Vibration resistance IEC 68-2-6

Hz/mm 5 ... 26/0.75

Shock resistance IEC 68-2-27

g/ms

15/11

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