Altech’s line of safety relays are manufactured by DOLD, a company well know in Europe for its quality safety relays. The products presented in this catalog will help you meet requirements of Machinery Directive 2006/42/EC, important international safety standards, CE-marking demand, and more, when exporting your machinery or equipment.
What is a Safety Relay?
A safety relay contains force guided contacts; they are also known as captive, locked or positive guided contacts. Force guidance in a relay means that the contacts in a contact set must be mechanically linked together so that it is impossible for the NO (normally open) and NC (normally closed) contacts to be closed at the same time. The contacts are linked so that no one contact in a relay can change state without changing all the contacts in that relay. There must be a 0.5 mm minimum air gap between the open contacts for the entire service life of the relay, even in the case of a failure. The force guidance of the relay contacts must always be preserved even when a relay part fails to function correctly.
Dold Safety Relays and Safety Modules help you meet important international standards, CE certification and more, when exporting your machinery.
Also included in this catalog is a Safety Module Selector Guide.
Typical applications include:
Equipment controls systems for:
Safety relays with forced-guided contacts are the core components for safety devices and are indispensable when designing safety circuits. Safety devices are designed to protect man and machine as demanded in OSHA CFR 1910 Regulations “General Requirements for All Machinery”, and which is a mandatory requirement of the European Machinery Directive EMD 2006/42/EC. DOLD safety relays, manufactured according to DIN EN 50205 and IEC/EN 61810, are approved for use in safety applications to IEC 60204, EN 60204, DIN/VDE 0113, as well as Escalator Standard EN 115/06.95 and Elevator Standard EN 81-1(electric) and EN 81-2(hydraulic), and in safety related parts of control systems in IEC/EN 62061 and EN ISO 13849.
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