Technical data
Enclosure design	Front panel mounting
Output contacts	1 C/O contact
Time function(s)	On-delay
Width	72 mm
Type	EF 7616
Variant
Contact equipping	1 changeover contact delayed, 1 changeover undelayed
Nominal voltage	AC 230 V
Time range	0,2 s - 60 h

The Dold time relay EF7616.32 is an on-delay industrial time relay for front panel mounting, designed for a rated voltage of AC 230 V and a frequency of 50/60 Hz. It is used for time-controlled operation of plant components, for example, for controlled motor start-up or for coordinating process steps in automation systems. The device features a wide adjustment range from 0.2 seconds to 60 hours, which can be continuously adjusted front-side via six switchable time ranges. The time function operates purely mechanically, ensuring a high repeatability of ≤ ± 0.5 %, with a permissible deviation of ≤ ± 1 % in the 3 and 6 second ranges.

Applications
This time relay is suitable for industrial applications where precise timing of switching operations is required. Typical applications include controlling pumps, fans, lighting systems, or protecting electrical installations through time-delayed shut-offs. The front panel mounting design allows for easy integration into existing enclosures and control systems. The spray-water-protected front face with protection class IP 65 makes the device suitable for use in locations where splashing water or moisture may occur.

Functions and Equipment in Detail
The device features two output contacts: one delayed changeover contact (on-delay) and one instantaneous changeover contact (immediate contact). The delayed contacts switch only after the set delay time has elapsed, while the instantaneous contacts switch immediately upon application of the control voltage. The time progression is indicated by a red pointer on the device scale, visually showing the progress of the delay time. A switching position indicator is also integrated, which is visible in the EF 7616 series, but not in the EH 7616 variant.

Technology Explained Simply
The time control is based on a purely mechanical principle, implemented via a synchronous motor and coupling. The delay time is adjusted by rotating a selector switch, which switches between the time ranges. The frequency switching between 50 Hz and 60 Hz is performed on the rear of the device by moving a latch with a screwdriver. If the voltage is interrupted at B1-B2, the timing sequence is reset, while an interruption at A1-A2 extends the delay time by the duration of the interruption.

Compatibility and Accessories
The time relay is part of Dold’s MINITIMER series and is compatible with other devices in this series, such as AA 7616, EC 7616, and EH 7616. The width of the device is 72 mm, enabling standard mounting in enclosures. The front face measures 72 x 72 mm. The devices are certified to EN 61812-1, ensuring compliance with safety and functional requirements for time relays. An optional voltage-loss-safe version is available, in which the elapsed time is retained in the event of a power failure.

Mounting and Installation
The device is mounted in front panel inserts, with mounting carried out using the provided fastening elements. The connection terminals are clearly labeled: A1-A2 for control and operating voltage, B1-B2 optionally for control voltage, and contact terminals 15-16 (normally open delayed), 27-28 (normally closed delayed), 31-32 (normally open instantaneous), and 43-44 (normally closed instantaneous). The delay time is adjusted via the front-mounted selector switch, which switches between the six time ranges.

Advantages in Operation
The combination of a wide adjustment range, high repeatability, and mechanical reliability makes the EF7616.32 a robust and low-maintenance component for industrial control systems. The front-side adjustment and visible time progression indicator simplify commissioning and maintenance. The IP 65 protection class allows use in damp or dusty environments without impairing functionality. Compatibility with other MINITIMER devices and clear labeling of connection terminals support quick integration into existing systems.