S_PEXT:通电既合,延时断开,窄脉冲可触发 S_PUSE:通电既合,延时断开,窄脉冲不可触发 S_ODT:通电延时闭合,断电即开,窄脉冲不可触发 S_ODTS:通电延时闭合,断电即开,窄脉冲可触发 S_OFFDT:通电既合,断电延时断开