E. Dold & Söhne Safety Relays — Complete Guide for Machine Safety Engineers

What Is E. Dold & Söhne and Why Are Their Safety Relays Industry-Standard?

E. Dold & Söhne KG is a leading German manufacturer of safety relays, monitoring relays and industrial timing devices. Founded in 1900 and headquartered in Furtwangen im Schwarzwald, Germany, DOLD has over 120 years of experience in electrical safety and control technology. Their products are used in machine safety applications worldwide — wherever EN ISO 13849 and IEC 62061 safety standards must be met.

VBN Vertriebs GmbH supplies original DOLD safety relays, monitoring relays and spare parts directly from Germany to industrial customers in Nigeria, UAE, Indonesia, Israel and worldwide.

DOLD Product Lines — What Does Each Series Do?

Safety Relays — SAFEMASTER Series

The DOLD SAFEMASTER range is the core of DOLD’s safety product portfolio. These safety relays monitor emergency stop circuits, safety gates, light curtains, two-hand controls and enabling switches. They are available in single-channel and dual-channel versions for Safety Integrity Levels SIL 1 to SIL 3 and Performance Levels PL c to PL e. The SAFEMASTER S (UH 6986) and SAFEMASTER W (UH 6985) are among the most widely used safety relay modules in European machine building.

Monitoring Relays — VARIMETER Series

DOLD VARIMETER monitoring relays monitor electrical parameters including voltage (over/under voltage), current, phase sequence, phase failure, frequency and insulation resistance. They protect motors, drives and electrical equipment from damage caused by power supply anomalies. Widely used in pumping stations, compressor systems, conveyor drives and HVAC equipment.

Speed Monitors — SAFEMASTER SG

DOLD speed monitoring relays detect standstill, underspeed and overspeed conditions on rotating machinery. They are used for safe standstill monitoring before opening machine guards — a common requirement in grinding machines, lathes and centrifuges.

Timing Relays — MULTIFUNCTION Series

DOLD multifunction timing relays provide on-delay, off-delay, interval and star-delta timing functions for motor control and process automation. Available in a wide range of time ranges from milliseconds to hours.

Solenoid Interlocks — PIBAG Series

DOLD PIBAG solenoid interlocks are electromechanical devices that lock safety guards closed until a machine has come to a safe condition. They combine guard locking with position monitoring in a single compact unit — essential for applications where the machine coast-down time is significant.

Most Frequently Ordered DOLD Products

VBN regularly exports the following DOLD products to customers in Nigeria, UAE, Indonesia and Israel:

SAFEMASTER S UH 6986 — dual-channel emergency stop safety relay, most popular model
SAFEMASTER W UH 6985 — safety relay for safety gate and light curtain monitoring
VARIMETER MVP UH 6800 — three-phase voltage monitoring relay
VARIMETER ISOMETER UG 0091 — insulation monitoring for IT networks
SAFEMASTER SG UH 6956 — speed monitoring safety relay for standstill detection
Multifunction timing relays — BD 5980, MK 9988 series

Industries Using DOLD Safety Relays

DOLD safety products are used wherever machinery must comply with functional safety standards. VBN supplies DOLD products to customers in the following sectors:

Oil & Gas — emergency shutdown systems, pump protection, motor monitoring
Food & Beverage — machine guarding for filling lines, conveyors and mixing equipment
Cement & Mining — safety interlocking on crushers, mills and conveyor systems
Pharmaceutical — cleanroom machine safety, IEC 62061 compliant installations
Automotive Manufacturing — robot cell guarding, press safety, two-hand control monitoring
General Machine Building — EN ISO 13849 safety circuit monitoring for CE compliance

How to Select the Right DOLD Safety Relay

Choosing the correct DOLD safety relay depends on:

Safety function — emergency stop, safety gate, light curtain, two-hand control or speed monitoring
Required Safety Level — Performance Level (PL) a–e or Safety Integrity Level (SIL) 1–3
Number of channels — single-channel or dual-channel input
Output contacts — number of safety outputs and auxiliary contacts required
Reset mode — automatic or manual monitored reset

Send us your application details or the existing DOLD part number and we will identify the correct replacement and provide a quotation within 24 hours.

How to Order DOLD Products from VBN

VBN Vertriebs GmbH exports original DOLD safety relays and monitoring relays from Germany worldwide. All products are supplied with full export documentation — CE declarations, test certificates, packing lists and commercial invoices.

View our DOLD Brand Page
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Request a Quote for DOLD Products — response within 24 hours