Available. The Keyence CZ-V21A is a main amplifier unit designed for use with Keyence's CZ-V20 series of RGB digital fiberoptic sensors. This NPN output unit offers high-speed response times, making it suitable for applications requiring rapid detection and processing. Key features include four NPN open-collector control outputs capable of handling up to 100 mA per output and a total of 200 mA across all outputs, with a maximum residual voltage of 1.0 V. The unit operates on a 24 VDC power supply with a ripple of 10% or less and consumes 1.5 W in normal mode and 1 W in eco-mode. It is built to withstand environmental conditions with an operating temperature range of -10 to +55 °C and vibration resistance up to 55 Hz with a double amplitude of 1.5 mm for 2 hours in each axis. The housing and cover are made of durable polycarbonate, and the unit weighs approximately 110 g. The CZ-V21A is ideal for industrial automation applications where precise and rapid signal processing is essential.