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Electromechanical Safety Relay feed

Safety relays


In the machine- and plant building sector the safety becomes more and more important. Everywhere, safety modules and also safety control systems are used.

Despite the increasing use of semiconductor relays, the electromechanical relays are still an important part.

Here these special relays find their application.

The safety relays or relays with positive guided contacts have at least one normally closed contact and one normally open contact. The normally closed contact and the normally open contact are never closed together.

Also the relay has to guarantee during its life a contact distance of 0,5 mm in operation and also in case of failure.

Due to this feature a primary monitoring function identifies if a contact breaks down.

Eg.: If a normally open contact is welded the corresponding normally closed contact is not able to close when switching off the supply voltage.


Field of application:


  • emergency stop modules
  • safety gate monitoring
  • light curtains
  • two- hand controls
  • elevator controls
  • railway applications
  • fuel technology


Sockets for the PCB mounting are available for mostly all safety relays. This allows a fast exchange between the relays at preventive machine care which is often prescribed regularly (eg power station) or in case of service. We provide sockets for DIN- rail mounting.

Customer- specific solutions

We are able to realise customer- specific solutions very fast due to a high production depth here in Furtwangen. We can supply relays with mixed contact types and materials.


Two different types of safety relays are available:

  • type A: all contacts are connected mechanically
  • type B: relays which have mechanic connected contacts as well as non- mechanic connected contacts. Also change- over contacts belong to this.

 All Dold safety relays correspond to the actual standards.

  • DIN EN 61810 basic relays
  • DIN EN 60255 electrical relays
  • DIN EN 50205 relays with positive guided contacts
  • DIN IEC 60664 insulation coordination for electrical equipment in low voltage systems
PCB relays from E. Dold & Söhne KG are available with 2,4,6 and 8 contacts, in upright or flat version, from 5A up to 10A, in sensitive version (extra low coil power), with AgSnO 2,AgNi 10 or AgNi 0,15 +5 µm gold plated contacts.



Emergency Stop Modules


Emergency stop modules with semiconductor output are checking periodical the outputs by switching off the output voltage. Controls, frequency converters or servo drives note this and switch off. This is not necessary with emergency stop modules or safety relays from Dold.  Therefore, a trouble- free working is guaranteed. In addition, the emergency stop modules have potential free outputs and in most  cases contactors won’t be used any more for higher loads.


Lift Controls


In lift controls Dold safety relays provide that the lift starts only when doors are closed.


Railway Applications


Dold safety relays build a safe and reliable interface between control level and periphery so that the trains do not stop on free road.


Safety relays
all Safety relays are available with the following contact materials : AgNi10; AgNi0,15 +5um Au; AgSnO2.
Also mixed contacts are possible!
Function Number of
washable Double
Temperature Height
Accessories Type
Safety relays 2 5 .. 110V 0.7W 5A optional
-40..+60°C 25.5 + OA 5669
Safety relays 2 6 .. 110V 0.8W 5A optional
-40..+85°C 25.5 + OA 5669/3____
Safety relays 2 6 .. 110V 0.75W 6A

-40..+70°C 10.8
OA 5667
Safety relays, reinforc.insulation 2 6 .. 110V 0.75W 6A

-40..+70°C 10.8
OA 5667/____4
Safety relays 4 6 .. 110V 1W 6A optional
-40..+60°C 25.5
OA 5670
Safety relays 4 6 .. 110V 0.6W 8A optional
-40..+85°C 30 + OA 5611
Safety relays, sensitiv 4 6 .. 110V 0.36W 8A

-40..+85°C 30 + OA 5611/___S
Safety relays, according UIC736i 4 6 .. 110V 0.7W 8A

-40..+70°C 30 + OA5611/31__L1
Safety relays 6 6 .. 110V 0.8W 8A optional
-40..+85°C 30 + OA 5612
Safety relays, sensitive 6 6 .. 110V 0.5W 8A

-40..+85°C 30 + OA 5612/___S
Safety relays 4 6 .. 110V 0.6W 8A + optional -40..+80°C 15.5 + OA 5621
Safety relays 6 6 .. 110V 0.8W 8A + optional -40..+80°C 15.5 + OA 5622
Safety relays 4 6 .. 110V 0.75W 10A optional
-40..+85°C 39.2 + OA 5601
Safety relays 6 6 .. 110V 1W 10A optional
-40..+85°C 39.2 + OA 5602
Safety relays 8 6 .. 110V 1.25W 10A optional
-40..+75°C 39.2 + OA 5603

Safety relay - Accessories
Function for Relay type Product name
Solder socket OA 5601 ET1415.011
Solder socket OA 5602 ET1415.012
Solder socket OA 5603 ET1415.013
Solder socket OA 5611 ET1415.031
Solder socket OA 5612 ET1415.032
Solder socket OA 5621 ET1415.035
Solder socket OA 5622 ET1415.037
Solder socket OA 5669 ET1415.021
Fixing clip OA 5669 ET1415.025
Socket for DIN-rail OA 5669 ET1415.041
Socket for DIN-rail, safe separation, screw connection OA 5669 ET1415.043
Socket for DIN-rail, safe separation, screw connection OA 5669 ET1415.046
Function module 24V AC, with green LED OA 5669 ET1415.912
Function module 24V DC, with free-wheeling diode and green LED OA 5669 ET1415.913
Function module 24V DC, with free-wheeling diode and red LED OA 5669 ET1415.911

Sort by:
Name Code Image Description Data
ET1415_011 D ET 1415_011 ET1415_011
Safety Relay Accessories OA/OW 5668, OA/OW 5669, OA 5672, OA 5682, OB 5694 download
OA5601 D OA 5601 OA5601
Safety relay OA 5601, OA 5602, OA 5603 download
OA5611 D OA 5611 OA5611
Safety relay OA 5611, OA 5612 download
OA5611_31_L1 D OA 5611_31_L1 OA5611_31_L1
Safety relay, acc. to UIC 736 i (signal relay) OA 5611.48/31 _ _L1, OA 5611.52/31_ _ L1 download
OA5611_S D OA 5611_S OA5611_S
Safety relay, sensitive OA 5611._ _ / _ _ _ _ S _ ; OA 5612._ _ / _ _ _ _ S _ download
OA5612 D OA 5612 OA5612
Safety relay OA 5611, OA 5612 download
OA5621 D OA 5621 OA5621
Safety relay OA 5621, OA 5622 download
OA5667 D OA 5667 OA5667
Safety relay OA 5667 download
OA5667_4 D OA 5667_4 OA5667_4
Safety relay OA 5667/_ _ _ _ _4 download
OA5669 D OA 5669 OA5669
Safety relay OA / OW 5669 download
OA5669_3 D OA 5669_3 OA5669_3
Safety relay OA 5669._ _ /3_ _ _ download
OA5670 D OA 5670 OA5670
Safety relay OA 5670 download

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