TDMB4 - Multi-Function Timer Relay

Functional Description

The TDMB4 is a multifunction relay with electronic time delay, consisting of 3 change-over contacts, and 1 Normally closed contact, for reliable switching of very low currents (1 mA @5 VDC) up to currents of 10A @ 110VDC.
A single TDMB4 relay offers 10 different timer functions, freely programmable by the user. The switching time can be selected within a wide range extending from 0.1 second to 99 hours. The timer function, the scale and the switching time are adjustable by means of 4 rotary switches, each having 10 positions, located on the top of the relay. The relay is equipped with two LEDs which indicate the presence of power supply and the energizing of the coil.
Built-in magnetic arc blow-out ensures adequate DC breaking capacity resulting in long contact life. The integrated contact separation prevents cross pollution of contacts.

Application

Relays continue to play a vital role in industrial market for transmission and power substation operation. Key functions are galvanic isolation between control (computers/ PLC’s) and power circuits providing system isolation, contact multiplication and amplification.
Other unique features are:
•Predictable failure behavior (Fail Safe) makingsystem safety validation simpler than usingcomputer-based solutions like PLC.
•Long-term availability (no obsolescence).
•Easy maintenance by plug-in feature and transparentcover.
With these features one can build a hardwired, fail-safe control system which is cyber secure and tolerance to electromagnetic disturbances and surges. Relays are ideal to use for signal transfer/repeating, safety interlocking functions, load on-off switching and sub- system isolation.

Features

•Compact plug-in relay, 10 different time delay
functions
•Wide time setting ranges from 0.1s to 99 hours
•3 C/O contacts +1 N/C time delayed contacts
•Led indication for power and coil energization
•High electromagnetic interference immunity
•Solid and rugged construction for heavy or intensiveduty, considerable long-life
•Independent and self-cleaning contacts
•Magnetic arc blow-out ensuring long contact life
•Transparent cover
•Excellent shock and vibration resistance
•Wide range of sockets
•Continuous current: maximum 10A.
•Back EMF protection diode

Options

•Gold plated contacts
•AgSnO2 contacts, weld resistant for capacitive loads
•Double make/double break contacts
•Keying (coding relay to correct socket)
Remark: Not all combinations are simultaneously possible