Ex STM 295

Applied standards

EN 60947-5-1, EN ISO 14119, EN IEC 60079-0, EN 60079-1, EN IEC 60079-7, EN 60079-18, EN 60079-31, EN ISO 13849-1

Enclosure

thermoplastic, glass-fibre reinforced, shockproof, self-extinguishing UL 94 V-0

Actuator

stainless steel 1.4301

Switch type

type 2

Coding level

low coding

Tightening torque

cover screws: 0.5 … 0.6 Nm
enclosure mounting screws: 1 … 1.3 Nm
switch inserts M3 screw connection terminals: min. 0.6 Nm
solenoid M3.5 screw connection terminals: min. 0.8 Nm

Degree of protection

IP64 (IEC/EN 60529)

B_10d (10 % load)

1 million

T_M

max. 20 years

Contact material

silver

Switching system

slow action, positive break NC contacts A

Switching elements

1 NC/1 NO contact + 1 NC/1 NO contact or 2 NC + 1 NC/1 NO contact

Connection

screw connection terminals

Cable cross-section

solenoid: 0.2 … 1.5 mm² (AWG 24 … 16)
switch inserts: 0.75 … 1.5 mm² (AWG 18 … 16)

Cable entry

2 x M20 x 1.5; use only Ex approved and certified cable glands with min. degree of protection IP64 and admissible ambient temperature range of -20 °C … +95 °C

Clamping range

7 … 12 mm

Rated insulation voltage U_i

250 V

Rated impulse withstand voltage U_imp

4 kV

Utilisation category

AC-15; DC-13

Rated operating current/voltage I_e/U_e

enabling/signalling contacts:
2 contacts: 3 A/250 VAC; 0.25 A/230 VDC
3 contacts: 1.5 A/250 VAC; 0,2 A/230 VDC;
direct-current solenoid: 0.08 A / 24 VDC +10 %/–15 %

Short-circuit protection

3 A / 1.5 A gG fuse;
direct-current solenoid: 2 A (slow blow)

Safety class

II

Power consumption

<2.5 W (continuous operation), max. 47 W (for 250 ms)

Operation cycles

max. 1200/h

Mechanical life

> 500 000 operations

Locking force F_max

1000 N

Impact energy

max. 7 J

Ambient temperature

–20 °C … +55 °C

Ex marking

L II 2G   Ex db eb mb IIC T4 Gb,
L II 2D   Ex tb IIIC T100°C Db

Approvals

BVS 10 ATEX E 053 X
IECEx BVS 11.0030X
f *
d *
Ü *
a *
* depending on the variant