ISK 71-242 + ISK 71-942 Inductive Safety Relay
2. General safety regulations and protective measures
• The manu�acturer and users o� the plant / machine on which the protection is being used are responsible
�or implementing and �ollowing all applicable sa�et�� regulations and rules.
• When used in conjunction with the higher‑order controller, the protection guarantees �unctional sa�et��,
but not the sa�et�� o� the entire plant / machine. The sa�et�� o� the entire plant / machine must, there�ore,
be assessed in accordance with machiner�� directive 2006/42/EG or appropriate product norm be�ore
using the device.
• The operating instructions must alwa��s be available at the place o� installation o� the protection.
The�� must be read thoroughl�� and observed b�� all persons involved in the operation, maintenance and
servicing o� the protection.
• The protection must onl�� be installed and commissioned b�� pro�essionals �amiliar with these opera-
ting instructions and the applicable operational sa�et�� and accident prevention regulations. All o� the
instructions provided in these operating instructions must be observed and �ollowed.
All electrical work must onl�� be per�ormed b�� skilled electricians.
• All relevant electrical engineering and Emplo��er's Liabilit�� Insurance Association sa�et�� regulations must
be observed.
•
During work on the switching unit, it is to be switched to zero potential, checked to ensure that it is at
zero potential and protected against being restarted.
• I� the potential‑�ree contacts o� the rela�� outputs are supplied externall�� with a dangerous voltage, make
certain that these outputs are also switched off during work on the switching unit.
• The switching unit does not contain an�� components that require servicing b�� the user. Unauthorised
conversions and repairs made to the switching unit will void all guarantees and the manu�acturer's
liabilit��.
• The protection s��stem is to be pro�essionall�� inspected at appropriate intervals and be documented in
such a wa�� that it is comprehensible at all times.
Safety advice
• The switching unit enables operation at 230 V as well as with 24 V AC/DC. Connecting the operating voltage
to the wrong terminals can destro�� the switching unit.
• The switching unit is to be installed in a switching cabinet.
• Do not install in the immediate vicinit�� o� strong sources o� heat.
• For capacitive and inductive loads, ensure adequate protective circuits.
The switching unit complies with EN ISO 13849-1 "Safety-related parts of control systems", Cat. 3.
To meet Cat. 3 requirements, the switching unit has a redundant structure with two, two-way
polling, forcibly actuated safety relays per channel.
The requirements of EN 12978 "Safety devices for power operated doors and gates" and EN 12453 "Safety
in use of power operated gates" are also fulfilled.
The manufacturer assumes no liability in the event of non-observance or intentional abuse.
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Inductive Safety Relay
Relay