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Euchner EUCHNER STA3A-2131A024MF-EX





We are EUCHNER STA3A-2131A024MF-EX product supplier in India

ORDER NO. 115584

Order number115584
Item designationSTA3A-2131A024MF-EX
Gross weight0,972kg
Customs tariff number85365019

Safety switch STA with door monitoring contact, ATEX

  • ATEX version
  • Suitable for use in zones 2 and 22 (gases and dusts)
  • Auxiliary release on the front
  • With door monitoring contact

Approach direction

Horizontal and vertical

Can be adjusted in 90° steps

Solenoid operating voltage

  • AC/DC 24 V +10%, -15%

Guard locking type

STA3Closed-circuit current principle, guard locking by spring force. Release by applying voltage to the guard locking solenoid.

Switching element

2131Slow-action switching contact 2 NC + 1 NO + 1 NC (door monitoring contact)

Auxiliary release

This is used for releasing the guard locking with the aid of a tool. To protect against tampering, the auxiliary release is sealed with sealing lacquer.

Electrical connection ratings

Power consumption8 W
Connection cross-section0.34 … 1.5 mm²
Rated insulation voltage Ui50 V
Rated impulse withstand voltage Uimp2.5 kV
Short circuit protection according to IEC 60269-14A gG
Switching current
min. at 24 V1 mA
Switching voltage
min. at 10 mA12 V
Utilization category
AC-154A 50V
DC-134A 24V
Solenoid operating voltage
AC/DC24 V -15% … +10%
Solenoid duty cycle100 %
rated thermal current Ith4 A

Mechanical values and environment

Approach directionA
Approach speedmax. 20 m/min
Number of door position NC contacts1
Number of guard lock monitoring NO contacts1
Number of guard lock monitoring positively driven contacts2
3 xCable gland M20 x 1.5
Degree of protectionIP67
Extraction force30 N
HousingDie-cast alloy
ContactSilver alloy, gold flashed
Actuation frequencymax. 1200 1/h
Actuating force35 N
Mechanical life1 x 10⁶
Installation orientationany
Insertion depth24.5 mm
Switching principleSlow-action switching contact
Clamping range for cable6.5 … 12 mm
Retention force20 N
Ambient temperature-20 … +75 °C
Locking force Fmax3000 N
Locking force FZh2300 N
Guard locking principleClosed-circuit current principle

Reliability values acc. to EN ISO 13849-1

Control of guard locking
CategoryDepending on external control of guard locking
Performance LevelDepending on external control of guard locking
PFHDDepending on external control of guard locking
Monitoring of guard locking and the guard position
B10D11.5 x 10⁶


Explosion protection
incl. cable glandII3G Ex nR IIB T4 Gc X /II3D Ex tc IIIC T110°C Dc X

In combination with actuator ACTUATOR-S-G-SN-C2115

Overtravel5 mm
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