General
Operating voltage	230 V AC
Type of current	DC or AC
Indication	7-segment display
Adjustable parameters	current type (AC/DC), upper and lower threshold, response delay, fault memory
Connection type	Screw terminals
Fault acknowledgment	on device and via external contact
Measurement ranges	two selectable current measurement ranges

The Metz Connect time relay type 11027205, also designated as EIW-C18 230VAC, is used for monitoring direct or alternating currents in live electrical installations. It detects exceeding or falling below preset current values and triggers a switching operation accordingly. The integrated 7-segment display informs the operator of the specific fault cause, enabling quick diagnosis and response. Settings are adjusted manually on the device itself, allowing configuration of the measured current type (AC or DC), upper and lower threshold values, response delay, and fault memory function (activated or deactivated). The two available current measurement ranges can be selected via the terminal clamps, enabling flexible adaptation to different application scenarios. Fault acknowledgment is possible both directly on the device and via an external contact, supporting integration into existing monitoring systems. Connections are made via screw terminals, ensuring a secure and reliable connection.

Applications
This device is designed for use in industrial and technical installations requiring continuous current monitoring. Typical applications include monitoring motors, pumps, heating systems, or other electrical consumers, where a sudden increase or decrease in current may indicate a fault or disturbance. The ability to monitor both direct and alternating currents extends its application range to systems with different current types, such as hybrid installations or those integrating battery storage. The integrated display enables quick visual fault detection, even in environments with limited visibility, provided the display is appropriately illuminated.

Functions and Equipment in Detail
The relay functions based on continuous measurement of the flowing current. When the preset threshold values are reached or exceeded, a switching command is triggered, which may activate an alarm signal or initiate a shutdown. The response delay can be individually adjusted to ignore short-term current fluctuations and detect only relevant disturbances. The fault memory can be activated to keep the fault cause visible even after acknowledgment. The 7-segment display indicates the fault cause, with the exact meaning of the display described in the operating manual. Manual input is performed via control elements on the device, designed for parameter adjustment.

Technology Explained Simply
The device operates with a supply voltage of 230 V AC, making it suitable for use in standard mains connections. Current measurement is performed via the terminal clamps, allowing selection between two measurement ranges depending on which current range is relevant for the specific application. The screw terminals ensure a mechanically stable and electrically reliable connection. The integrated logic detects current changes and responds according to the set parameters. The output is delivered via a switching operation, for example, activating a relay or contact. Fault acknowledgment can be performed via an external contact, enabling integration into higher-level control systems.

Compatibility and Accessories
The device is designed for use in live installations and can be combined with other monitoring components, especially in systems requiring fault acknowledgment via external contacts. The terminal clamps allow for easy integration into existing circuits.

Mounting and Installation
Mounting is performed via the screw terminals, intended for connection to the wiring. Installation requires secure and correct connection of the wires to the terminals to ensure reliable current measurement and switching function. The device should be positioned so that the display is clearly visible and the control elements remain accessible.

Operational Advantages
The integrated 7-segment display enables quick and visual fault detection, reducing response time during disturbances. The manual adjustability of parameters such as threshold values, response delay, and fault memory allows individual adaptation to the specific requirements of each installation. The ability to select the current type (AC/DC) expands application possibilities. Fault acknowledgment via external contact supports integration into higher-level control systems, making maintenance and diagnostics more efficient. The screw terminals ensure a robust and durable connection, reliably functioning even under industrial conditions.