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Ex STM 295
Montage- und Anschlussanleitung / Sicherheitszuhaltung
Mounting and wiring instructions / Solenoid interlock
Instructions de montage et de câblage / Dispositif d' interverrouillage
Istruzioni di montaggio e collegamento / Elettroserratura di sicurezza
Instruções de montagem e instalação / Chave de segurança com bloqueio
Инструкция по монтажу и подключению / Реле защитной блокировки
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st
eut
e T
echnol
ogies GmbH & Co. K
G
Brück
ens
tr
aße 91, 32584 Löhne, Germany
, www
.s
teut
e.c
om
The solenoid interlocks in series Ex STM 295 comply with the Europe-
an standards for explosion protection EN 60079-0, -1, -7, -18 and -31
and therefore are designed for the explosive areas of zones 1 and 2 as
well as 21 and 22 as to EN 60079-14. The requirements of EN 60079-
14, e.g. regarding dust deposition and temperature limits, must be
met. The Ex STM 295 solenoid interlocks secure that movable protec-
tive guards such as fences, doors or covers in combination with the
control circuitry of a machine, such as safety timers or standstill mon-
itors, cannot be opened until dangerous situations (e.g. over-run
movements) have been terminated.
There are two versions available.
1. Spring-to-lock principle: lock by spring, unlock by power supply of
electromagnet.
2. Power-to-lock principle: lock by power supply of electromagnet, un-
lock by spring.
This 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. 1500 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 and dismantling
=
DANGER
Live parts and explosive atmosphere.
Electric
shock hazard! Explosion hazard! Risk of burns!
Ignoring this message will lead to serious injuries
or death. Connecting and disconnecting only to be
performed by qualified and authorised personnel.
Connecting and disconnecting only in
non-explosive atmospheres.
=
DANGER
Leakage caused by untight cover.
Explosion hazard!
Risk of burns!
Ignoring this message will lead to
serious injuries or death. Tighten the cover appro-
priately. Oberserve tightening torque 0.5 - 0.6 Nm.
=
DANGER
Leakage caused by defective, faulty or incorrectly
installed cable gland.
Explosion hazard!
Risk of
burns!
Ignoring this message will lead to serious
injuries or death. 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 fer-
rules. Mount the solenoid interlock and actuator on an even surface.
English
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!
Ignoring this
message will lead to serious injuries or death.
Protective cover over contacts must be intact.
=
DANGER
In case of overloaded contacts too high operation
temperatures.
Explosion hazard! Risk of burns!
Ig-
noring this message will lead to serious injuries or
death. 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!
Ignoring this
message will lead to serious injuries or death.
When cleaning: observe degree of protection IP64.
- Use a damp cloth to clean devices in explosive 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.
Maintenance, repair and service
=
DANGER
Live parts.
Electric shock hazard!
Ignoring this
message will lead to serious injuries or death.
Do not repair defective or damaged devices.
Replace them.
