Selectron Lyss – GZEA 21 – Universal Cycle Timer Relay 12–240VAC/DC Dual‑Contact

The GZEA 21 from Selectron Lyss is a robust Swiss-made cycle timer relay designed for industrial process control. It combines dual-pole switching with both ON and OFF delay functions, including continuous cycling. The device supports wide voltage input and adjustable timing ranges, ideal for sequencing tasks or repetitive operations in heavy-duty control panels.

Key Features:

• Model / P/N: GZEA 21 (formerly GZEA 20)  

• Supply Voltage: Universal 12…240 VAC or DC

• Timer Function: Cycle timer – alternate ON/OFF delays with repeat function  

• Time Range: Extended timing capabilities; typical ranges cover seconds to hours via external potentiometer  

• Contacts: 2 changeover (SPDT) relay outputs – supports isolated control circuits

• Control Interface: Dual rotary knobs for ON/OFF time adjustment; external potentiometer support (pins 6/8)

• Mounting: Plug-in 11-pin base in compact housing (~38 × 86 × 76.5 mm)

• Indicators: Power LED included; built for industrial durability