... set freely; Delay output,3 output control. 2011---HH series Intelligent Segments Time RelayHH4 series, 48*48*80mm, dual line 4 ... . Various timing modes: Increase timing, decrease timing, switch/pulse or level control timing.2, Dual 4/6 digit display in **H ... customized, eg. motor step control.4, Standard RS232/RS485 communication interface, MODBUS RTU protocol. Can connect to other equipments /PC /LC ...