Achieving up to 89% efficiency, bench-/rack-mount Z+ series includes models offering output voltage ratings of 0–160 Vdc, 0–320 Vdc, and 0–650 Vdc; output current ratings of 0–4 A, 0–2 A, and 0–1 A; and output power rating of 640–650 W. Programming can be accomplished via front panel controls or remotely using USB, RS232/485, or analog control interfaces. Able to operate in constant current or constant voltage modes, models accept universal 85–265 Vac input and support parallel connection.