1、正/负极性输入：用于5V、mV或传感器信号；
选型举例：SK-XMGB243-00-P-T
表示：16080mm的竖式智能光柱数显控制仪，四个报警控制输出，电流输入信号，无变送输出，DC24V馈电输出，AC220电源。
SK-XMGA211,SK-XMGA221,SK-XMGA231,SK-XMGA241,SK-XMGB201,SK-XMGB211,SK-XMGB221,SK-XMGB231,SK-XMGB241,
SK-XMGA202,SK-XMGA222,SK-XMGA232,SK-XMGA242,SK-XMGB202,SK-XMGB212,SK-XMGB222,SK-XMGB232,SK-XMGB242,
SK-XMGA203,SK-XMGA213,SK-XMGA233,CCLAIR,SK-XMGA243,SK-XMGB203,SK-XMGB213,SK-XMGB223,SK-XMGB233,SK-XMGB243,
SK