Understanding the electrical limits of your Diehl 181-5 is crucial before installation or troubleshooting.

Continuously forces the contacts closed (On), bypassing the timer.

Completes the circuit when the timer activates.

Note: These terminals constantly power the internal clock mechanism so it keeps accurate time. 2. Switch Contacts (Terminals 3, 4 & 5)

, it is critical to prioritize safety. Dealing with 230V AC mains electricity poses severe risks of shock or electrocution.

The Diehl 181-5 is a digital programmable time switch, designed to turn electrical devices on and off at scheduled times. It is a DIN-rail mounted or surface-mounted device (depending on the specific 181 variant) often found in older electrical panels or integrated into appliance control systems. Key Features

The shortest interval between switching points is 1 minute . Plan your schedule accordingly.

Rotate the minute hand until the outer numbers align perfectly with the current actual time arrow indicator (usually marked by a fixed wedge on the housing).

Some variants include a battery backup (quartz-controlled) to maintain time during power outages. Operation and Setup