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Milestones of the company development

1928

Founded by Emil Dold

1936

Production of the first relays

1948

New beginning with 44 employees

1952-65

Steady increase too 333 employees

1967

First modular panel mounted timer

1969

The mini time relay ZS 700 starts new area in control due to universal construction as relay for panel mounting and flush mounting

1975-76

Extension of production facilities and new 7 story building

1978

First programmable logic controller in standard enclosure for automobile and machine tool industry

1982

Production of first DC-Brake systems

1988

First emergency stop module starts the new safety product range

1989

The first safety relay with positive guided contacts start a new area in the section PCB relays

1992

Product range is extended with softstart devices and semiconductor contactors

1994

The first 2-wire fault annunciator system reduces wiring

1999

The first CANopen PLC in a 35 mm wide enclosure for consumer units to be used in small and medium applications with I/O modules

2000

The enclosure series KO 4300 offers besides choosable connection facilities 16 connection terminals per 22,5 mm width

2001

The first multifunction safety module allows to chose between 5 different safety functions

2003

DOLD extends the wide range of insulation monitors by the first differential current monitor

2004

With the multifuctional, modular expandable safety system safemasterM DOLD creates new dimensions in safety solutions

2004

DOLD presents the first CANopen PLC in IP67-enclosure

2005 Production of most compact safety module based on own miniature safety relay
2006 Integration of monitoring functions into solid state motor management modules