438US产品概述
Artisan introduces a new package for our same high quality in-line timers. The Model 438USAS, 438UPS and 438US provide an operating voltage range of 19-288 VAC/VDC for control of 1 amp loads. The 438USAS timing is controlled by a 10-position binary dip switch, the 438UPS is controlled by an external potentiometer and the 438US offers the option for the customer to provide a resistor to control time by increasing resistance of 10k ohm per second. All products are UL/cUL approved.