steute Ex STM 295 Solenoid Interlock Instruction Manual

: June 9, 2024
: Steute

steute logo1

// Ex STM 295

Mounting and wiring instructions / Solenoid interlock

Use of the mounting and wiring instructions

Target group: authorised and qualified staff.
All actions described in these instructions may only be performed by qualified persons who have been trained and authorised by the operating company.

Read and understand these mounting and wiring instructions.
Comply with the valid occupational safety and accident prevention regulations.
Install and operate the device.

Selection and installation of devices and their integration in control systems demand qualified knowledge of all the relevant laws, as well as the normative requirements of the machine manufacturer.
In case of doubt, the German language version of these instructions shall prevail.

Scope of delivery

1 device, 1 mounting and wiring instructions, carton.

Safety information

In this document, the warning triangle is used together with a signal word to indicate a hazardous situation.

The signal words have the following meanings:

NOTICE
indicates a situation which may result in material damage.| CAUTION
indicates a situation which may result in minor or moderate injury.
---|---
WARNING
indicates a situation which may result in serious injury or death.| DANGER
indicates a situation which will result in serious injury or death.

Intended use

DANGER
Misuse and explosive environment. Explosion hazard! Risk of burns! Not for use in category 1/zone 0 and zone 20. Use only in permitted categories/ zones. Use device only in accordance with the operating conditions defined in the mounting and wiring instructions. Use device only in accordance with the intended purpose defined in the mounting and wiring instructions.

WARNING
In case of inadequate or improper use or manipulations of the device, personal hazards or damage to machinery or plant components cannot be excluded. Warning about misuse! Observe the relevant instructions of EN ISO 14119.

The device complies with the European standards for explosion protection EN 60079-0, -1, -7, -18 and -31. It is intended for use in hazardous areas of zones 1 and 2 as well as zones 21 and 22 according to EN 60079-14. Comply with the requirements of EN 60079-14, e.g. with regard to dust deposits and temperature limits. The Ex STM 295 solenoid interlocks secure that movable protective guards such as fences, doors or covers in combination with the control circuitry of a machine, such as safety timers or standstill monitors, cannot be opened until dangerous situations (e.g. over-run movements) have been terminated.
There are two versions available.

Spring-to-lock principle: lock by spring, unlock by power supply of electromagnet.
Power-to-lock principle: lock by power supply of electromagnet, unlock by spring. Th is version may only be applied after careful risk analysis because in case of power failure, immediate access is given.

Special conditions and »X« marking

If no external fuse with min. 1,500 A switching capacity is connected, limit the maximum possible short-circuit current of the supply source to a switch- off capacity of the internal fuse to 50 A.

Installation, mounting, dismantling

DANGER
Live parts and explosive atmosphere. Electric shock hazard! Explosion hazard! Risk of burns! Connecting and disconnecting only to be performed by qualified and authorised personnel. Connecting and disconnecting only in non- explosive environment.

DANGER
Leakage lowers the IP degree of protection. Explosion hazard! Risk of burns! Tighten the cover appropriately. Oberserve tightening torque 0.5 – 0.6 Nm. Install cable gland correctly. Check cable gland for tightness (min. IP64) where it meets the cable.

Single-wires must be stripped at least 5 mm, multi-wires must be stripped at least 5 mm and equipped with 5 mm long conductor ferrules. Mount the solenoid interlock and actuator on an even surface. The solenoid interlock Ex STM 295 has to be fixed with 3 screws for which 3 fixing holes are provided. The electrical connection may only be carried out by authorised personnel. They must take care that the accessibilty of actuators or spare actuators is prevented because of the danger of manipulation. Ensure that the device cannot be moved from its position. Ensure this in case of failure, too. For protection against manipulation use oneway safety screws. With other fastening, e.g. riveting or welding, ensure that the immersion depth of the coded actuating bracket does not change. Operational use of the auxiliary unlocking device must be eliminated by appropriate measures. When mounting the actuator and switch, observe the requirements of EN ISO 14119, especially the sections 5.1 to 5.4! Observe the instructions in the standards EN ISO 12100 and EN ISO 14120.

Application and operation

DANGER
Live parts. Electric shock hazard! Protective cover over contacts must be intact.

DANGER
In case of overloaded contacts too high operation temperatures. Explosion hazard! Risk of burns! For short-circuit protection use appropriate fuse size.

– Use device only within the permitted electrical load limits (see technical data).
– Use device only within the permitted ambient temperature range (see product label and technical data).

Cleaning

DANGER
Live parts. Electric shock hazard! When cleaning: observe degree of protection IP64.

– Use a damp cloth to clean devices in hazardous areas. This prevents electrostatic charge.
– In case of damp cleaning: use water or mild, non-scratching, non-chafing cleaners.
– Do not use aggressive cleaners or solvents.

Service, maintenance, repair

DANGER
Live parts. Electric shock hazard! Open device only while it is in zero potential state. Do not repair defective or damaged devices. Replace them.

DANGER
Explosive atmosphere. Explosion hazard! Risk of burns! Observe maximum switching cycles. Do not rebuild or modify the device in any way.

NOTICE
In all operational life phases of the device, measures that are constructively and organizationally suitable for protection against manipulation or against circumvention of the safety device, e.g. by using a spare actuator.

With careful mounting as described above, only minor maintenance is necessary. We recommend a routine maintenance as follows:

Check switching function.
Check for tight installation of the switch and actuator.
Check for alignment of solenoid interlock and actuator.
Removal of dirt.
Screw and close cover correctly, tightening torque 0.5 … 0.6 Nm.

Disposal

– Observe national, local and legal regulations concerning disposal.
– Recycle each material separately.

N.B.

Do not use the device as a mechanical endstop. Any mounting position is possible. It should be selected in such a way that no coarse dirt can fall into the used slot. The unused slots should be protected with the optional slotcaps. Reconstruction and alterations at the device – which might affect the explosion protection – are not allowed. Furthermore, EN 60079-14 has to be applied for the installation of electrical equipment in hazardous areas. The described products were developed in order to assume safety functions as part of an entire plant or machine. A complete safety system normally covers sensors, monitoring modules, indicator switches and concepts for safe disconnection. Therefore, a validation according to EN ISO 13849-2 or EN 62061 is necessary. Furthermore, the Performance Level according to EN ISO 138491 and SIL CL Level according to EN 62061 can be lower than the single level because of the combination of several safety components and other safety- related devices, e.g. by serial connection of sensors. It is the responsibility of the manufacturer of a plant or machine to guarantee the correct general function. Subject to technical modifications.

Mounting distance

Tightening torque 1 – 1.3 Nm
Tightening torque 0.5 – 0.6 Nm

Dimensions

Ex STM 295

steute Ex STM 295 - Dimensions 1

Ex STM 295-FE

steute Ex STM 295 - Dimensions 2

Ex STM 295-90°

STM 295-B1 STM 295-B5

steute Ex STM 295 - Dimensions 5

STM 295-B6

steute Ex STM 295 - Dimensions 6

Actuating radii

steute Ex STM 295 - Actuator

Actuator|

a

| b|

x

---|---|---|---
STM 295-B1|

350 mm

| 700 mm|

11 mm

STM 295-B5|

350 mm

| 700 mm| 13,5 mm
13.5 mm
STM 295-B6|

100 mm

| 100 mm|

13 mm

Contacts

Contact symbols are shown for the guard in closed position and current-free state.

Contacts Spring-to-lock principle

steute Ex STM 295 - Spring-to-lock principle 1
Ex STM 295 1Ö1S/1Ö1S-R

steute Ex STM 295 - Spring-to-lock principle 2
Ex STM 295 2Ö/1Ö1S-R

steute Ex STM 295 - Spring-to-lock principle 3
Ex STM 295 1Ö1S/2Ö-R

steute Ex STM 295 - Spring-to-lock principle 4
Ex STM 295 2Ö1S/2Ö1S-R

positive break actuated not actuated Monitoring of the guard-lock to EN ISO 14119

Contacts Power-to-lock principle

steute Ex STM 295 - Power-to-lock principle 1
Ex STM 295 1Ö1S/1Ö1S-A

steute Ex STM 295 - Power-to-lock principle 2
Ex STM 295 2Ö1S/2Ö1S-A

steute Ex STM 295 - Power-to-lock principle 3
Ex STM 295 2Ö/1Ö1S-A

positive break actuated not actuated Monitoring of the guard-lock to EN ISO 14119

Technical data

Applied standards| EN 60947-5-1; EN 60079-0, -1, -7, -18, -31; EN ISO 14119; EN ISO 13849-1
---|---
Enclosure| fibreglass-reinforced, shockproof thermo-plastic, self- extinguishing UL 94-V0, protective insulation
Defined object| actuator STM 295-B1, -B5 or -B6
Actuator| stainless steel 1.4301
Tightening torque| cover screws: 0.5 … 0.6 Nm;
switch inserts:
M3 screw connection terminals min. 0.6 Nm;
solenoid:
M3.5 screw connection terminals min. 0.8 Nm
Switch type| type 2
Coding level| low coding
Switching system| slow action, positive break NC contact , galvanically separated contact bridges
Switching elements| Ex 95 …
DMT 00 ATEX E 093 U
IECEx BVS 16.0009 U or
Ex E * 04.93
BVS 16 ATEX E 107 U
IECEx BVS 16.0069 U
Degree of protection| IP64 to EN 60079-0 and EN 60529
Connection| M3 screw connection terminals
Cable cross-section| min. 0.2 mm² (AWG 24),
max. 1.5 mm² (AWG 16);
required cable: plastic-sheathed cable max.
10 x 1.5 mm² (min. 0.75 mm² AWG 18) to
DIN VDE 0165, temperature-resistant from
-20°C … +80°C, Ø 5 … 9 mm
Cable entry| 2 x M20 x 1.5; use only Ex approved and certified cable glands min. degree of protection IP64 and admissible ambient temperature range of -20°C … +95°C
B 10d (10% nominal load)| 1 million
T M**| max. 20 years
U i**| 250 V
U imp**| 4 kV
Holding force F| 1,000 N
Utilisation category| AC-15; DC-13
Switching capacity| enabling/signalling contacts:
3 A / 250 V (AC-15)b
0.25 A / 230 V (DC-13)b1.5 A / 250 V (AC-15)b
0.25 A / 230 V (DC-13)bdirect-current solenoid:
0.08 A / 24 V DC +-10% / -15%
Short-circuit protection| 3 A / 1.5 A gG/gN fuseb
direct-current solenoid: 2 A (slow-blow)
Power consumption| >2.5 VA (continuous operation)
max. 47 VA (for 250 ms)
Operation cycles| max. 1,200/h
Mechan. life| >500,000 operationsa
Temperature class| T4
Ambient temperature| -20°C … +55°C
Ex marking| II 2G Ex db eb mb IIC T4 Gb,
II 2D Ex tb IIIC T100°C Db
BVS 10 ATEX E 053 X
IECEx Ex db eb mb IIC T4 Gb,
Ex tb IIIC T100°C Db
IECEx BVS 11.0030 X

a For reasons of explosion protection max. 106 operations, replace switch insert.
b Depending on the variant, see product label.

Production date 013522 = > Monday CW 35 / 2022

01

| Monday
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02

| Tuesday

03

| Wednesday

04

| Thursday

05

| Friday

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EU DECLARATION OF CONFORMITY

according to Explosion Protection Directive 2014/ 34/EU

As manufacturer, steute Technologies is solely responsible for issuing this Declaration of Conformity.

Type and name of equipment: Ex solenoid interlock, types Ex STM 295 …

We hereby declare that, due to its design and construction, the above mentioned electrical equipment satisfies the requirements of directive 2014/34/EU in respect to basic safety and health requirements according to Annex II.

Applied EU directive| Applied harmonised/designated standards| Comments
---|---|---
2014/34/EU Explosion Protection Directive| EN IEC 60079-0:2018,
EN 60079-1:2014,
EN 60079-7:2015,
EN 60079-18:2015,
EN 60079-31:2014|
EU-type examination:| Ex marking| Comments
BVS 10 ATEX E 053 X| II 2G Ex db eb mb IIC T4 Gb
II 2D Ex tb IIIC T100°C Db|
Additionally applied EU directives| Harmonised/Designated standards| Comments
2006 / 42 / EC Machinery Directive| EN 60947-5-1:2017;
EN ISO 14119:2013|
2014 / 30 / EU EMC Directive| EN 60947-5-1:2017;
EN 61000-6-1:2007,
EN 61000-6-2:2005;
EN 55011:2016 + A1:2017|
2011 / 65 / EU RoHS Directive| EN IEC 63000:2018|