Safety Relays

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.

• Force Guided Contacts
• 2 to 8 poles
• 5 to 110VDC
• PCB sockets
• DIN Rail sockets and modules

Also included in this catalog is a Safety Module Selector Guide.

Typical applications include:

• Emergency Stop Modules
• DIN Rail safety modules
• Safety door controls
• Two-hand operating devices
• Pressure mat controls
• Light barriers and curtains
• Speed controls
• Monitoring devices
• Two Hand Safety
• Safety Gate
• Monitor of Safety Circuits for Line Breakage and Shorts
• Detection of Shorts on Emergency Stop Switches
• Controlled, Safe Stop of Machinery in an Emergency Situation