HomeProductsElectromechanical safety switches with guard lockingSTA metal switch with metal headSTA4A-4121A024MF-EX

STA4A-4121A024MF-EX (Order no. 123076)

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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

Description

Approach direction

Horizontal and vertical

Can be adjusted in 90° steps

Solenoid operating voltage

AC/DC 24 V +10%, -15%

Guard locking type

STA4	Open-circuit current principle, guard locking by applying voltage to the guard locking solenoid. Release by spring force.

Switching element

4121	Slow-action switching contact 2 NC + 1 NC / 1 NO (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.

1	Auxiliary release
2	Cover screw (4x M = 1.5 Nm)
3	Locking screw
4	Ground the switch via the earth conductor terminal to prevent electrostatic charging (conductor cross-section 4 mm²)
5	ATEX cable gland for included (cable diameter 6.5...12 mm)
6	Two screw plugs included (M = 2 Nm)

Power consumption	8 W
Connection cross section	0.34 ... 1.5 mm²
Rated insulation voltage U_i	50 V
Rated impulse withstand voltage U_imp	2.5 kV
Utilization category
DC-13	4 A 24 V
AC-15	4 A 50 V
Short circuit protection according to IEC 60269-1	4A gG
Solenoid operating voltage
AC/DC	24 V -15% ... +10%
Solenoid duty cycle	100 %
Switching voltage
min. at 10 mA	12 V
Switching current
min. at 24 V	1 mA
thermal rated current I_th	4 A

Approach speed	max. 20 m/min
Approach direction	A
Connection type
3 x	Cable gland M20 x 1.5
Number of door position NC contacts	1
Number of door position NO contacts	1
Number of guard lock monitoring positively driven contacts	2
Extraction force	30 N
Actuation frequency	max. 1200 1/h
Actuating force	35 N
Installation orientation	any
Insertion depth	24.5 mm
Clamping range for cable	6.5 ... 12 mm
Mechanical life	1 x 10⁶
Retention force	20 N
Switching principle	Slow-action switching contact
Degree of protection	IP67
Ambient temperature	-20 ... +75 °C
Material
Contact	Silver alloy, gold flashed
Housing	Die-cast alloy
Locking force F_max	3000 N
Locking force F_Zh	2300 N
Guard locking principle	Open-circuit current principle

	B10_D	Mission time
Monitoring of the guard position	1.15x10⁷	20 y
Monitoring of the guard position	Important! Values valid at DC-13 100 mA/24V
Monitoring of guard locking	1.15x10⁷	20 y
Monitoring of guard locking	Important! Values valid at DC-13 100 mA/24V

Explosion protection
incl. cable gland	II3G Ex nR IIB T4 Gc X /II3D Ex tc IIIC T110°C Dc X

Ordernumber	123076
Item designation	STA4A-4121A024MF-EX
Gross weight	0,951kg
Customs tariff number	85365019000
ECLASS	27-27-26-03 Safety switch with guard control

STA4A-4121A024MF-EX (Order no. 123076)

Safety switch STA with door monitoring contact, ATEX

Description

Approach direction

Solenoid operating voltage

Guard locking type

Switching element

Auxiliary release

Functional drawings

Dimensional drawings

Connection examples

Technical data

Approvals

Electrical connection values

Mechanical values and environment

Characteristic values according to EN ISO 13849-1 and EN IEC 62061

Miscellaneous

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

Accessories

Downloads

Complete package

Single Documents

Other Documents

Ordering data

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