Safety temperature limiter Type STR100

Safety Temperature Limiter for Pt100, SIL 2 according to IEC 61508

Safety temperature limiter Type STR100

Part number

AC 230 V
0...200°C
AC 230 V
100...300°C
AC 230 V
200...500°C
DC 24 V
0...200°C
DC 24 V
100...300°C
DC 24 V
200...500°C

Product description

 

The Safety Temperature Limiter type STR 100 is an electronic thermostat monitoring the temperature of heating equipment and machinery. When the permitted temperature-limit is exceeded or in case of a malfunction, the STR 100 switches off without delay. An active reset must be made for a restart. The temperature limit is adjustable with a scaled potentiometer. An unintended or unauthorized adjusting of the limit is prevented through a lead-sealed transparent cover.

With supply voltage switched on, the STR 100 operates in a changeable lockout mode and the relay must be started by a reset (manually with built-in reset button or external reset) to make contact (no) close. Applicable for plants with supervised operation. The mode of operation corresponds to type 2BJK according EN 60730/VDE 0631.

The temperature is measured with a Pt 100 resistance temperature detector (RTD) according to EN 60751 / IEC 751. The process qualification in combination with the sensor must be proved. To fulfil affords for higher safety functionality the function has to be routine-tested periodically. The thermostat series STR 100 meets safety category 3 (Safety of machines EN 954-1, TÜV Rheinland documents T 24/00 + T103 2007 Z1 + T103 2007 E2). If safety approval is recommended only use listed RTD.

Temperature Limiter
A temperature-limiter is an equipment that switches of permanently (locked) after the limit has been exceeded. A reset (manually or with a tool) is possible after the temperature has fallen below switch-back point (limit minus hysteresis).

Safety Temperature Limiter
A safety temperature limiter is a limiter that fulfils in addition the requirements of extended safety according to DIN 3440.

 

Technical Data

Rated supply voltage Us

.......

AC 230 V
DC 24 V

 

Tolerance voltage

.......

50 / 60 Hz

 

Power consumption

.......

< 2 W

 

Internal fuse

.......

T 0.16 A time-lag (or slow blow 0.25 A)

 

Sensor connection

.......

2-wire Pt 100 RTD according EN 60751/IEC 751
α = 0.00385

 

Terminal current max.

.......

< 3.15 mA

 

Terminal voltage max.

.......

< 15 V open terminals
< 2 V with Pt 100 and highest temperature

 

Line compensation

.......

0.5 Ώ normally

 

Release function

Temperature limit

.......

adjustable, see temperature range

 

Accuracy

.......

±2 % of scale

 

Hysteresis

.......

10 °C (±25 %)

 

Reset

.......

internal reset button or contact (no) Y1, Y2

 

Temperature factor

.......

0.2 K/10 °C

 

Relay output 11, 12, 14

Alarm

.......

1 co contact, closed current circuit principle

 

Switching voltage

.......

max. AC 400 V max. DC 300 V

 

Switching current

.......

max. 6 A

 

Switching power (resistive load)

.......

max. 2000 VA max.48 W at DC 24 V

 

Rated operational current Ie

.......

2 A AC15 400V
2 A DC13 24 V
3 A AC15 230V

 

Recommended Fuse

.......

4 A quick acting

 

Mechanical contact life

.......

3 x 107 operations

 

Electrical contact life

.......

1 x 105 operations with 230 V/6 A

 

Factor of reduction at cos. ϕ = 0.3

.......

0.5

 

Relay output 21, 22

Alarm

.......

1 nc contact, operating current principle

 

Switching characteristic minimum

.......

12 V 10 mA AC/DC

 

* We recommend an RS-Suppressor to avoid high voltage spikes when a contactor is connected.


Reset push-button Y1, Y2

.......

1 no, potential-free

 

Switching characteristic minimum

.......

1 V 1 mA DC

 

Testing conditions (EN 50178, EN 61010-1, EN 60947-5)

Rated insulation voltage Ui

.......

AC 250 V

 

Contamination level

.......

2 (normal)

 

Rated impulse voltage

.......

4000 V

 

Overvoltage category

.......

III

 

EMC - Interference resistance

.......

EN 61000-6-2, EN 61326

 

EMC - Interference transmission

.......

class B, EN 61326

 

On period

.......

100 %

 

max. ambient temperature

.......

0...50 °C EN 600068-2-2 Dry Heat

 

Housing

Design

.......

built-in type, pluggable

 

Material

.......

Housing  .......  PA 6.6
Socket  .......  PA 6.6 GF25

 

Flame Class

.......

UL 94 V-2
UL 94 HB

 

Dimensions (H x W x D)

.......

82 x 42 x 121 mm

 

Line connection solid wire

.......

1 x 2.5 mm2

 

Stranded wire with ferrules

.......

1 x 1.5 mm2

 

Degree of protection (IP-Code)

.......

Housing  .......  IP 40
Socket.......  IP 20

 

Fitting position

.......

any

 

Mounting

.......

35mm standard rail EN 60715 or with M4 screws

 

Vibration resistance

.......

1 mm at 25 Hz
10 g at 25 …100 Hz

 

Shock resistance

.......

10 g for 20 ms, 20 g for 4 ms

 

Weight

.......

app. 300 g