PILZ继电器的工作原理：
PILZ安全继电器一般由铁芯、线圈、衔铁、触点等组成的。只要在线圈两端加上一定的电压，线圈中就会流过一定的电流，从而产生，衔铁就会在吸引的作用下克服返回弹簧的拉力吸向铁芯，从而带动衔铁的动触点与静触点（）吸合。当线圈断电后，电磁的吸力也随之消失，衔铁就会在弹簧的反作用力返回原来的位置，使动触点与原来的静触点（）吸合。这样吸合、释放，从而达到了在电路中的导通、切断的目的。对于继电器的“常开、常闭”触点，可以这样来区分：继电器线圈未通电时处于断开状态的静触点，称为“常开触点”；处于接通状态的静触点称为“常闭触点”。
PILZ继电器部分型号：
828020 S1IM/UB24VAC/IM10AACDC 828035 S1IM/UB24VDC/IM10AACDC UP 828040 S1IM/UB110-
130VAC/IM10AACDC 828050 S1IM/UB230-240VAC/IM10AACDC 837250 S3UM/UB24VDC/UM100/110VAC 837260
S3UM/UB 24VDC/UM230VAC 837270 S3UM/UB24VDC/UM400/440VAC 837280 S3UM/UB24VDC/UM415/460VAC
837285 S3UM/UB24VDC/UM480/500VAC 837290 S3UM/UB24VDC/UM500/550VAC 837350
S3UM/UB230VAC/UM100/110VAC 837360 S3UM/UB230VAC/UM230VAC 837370 S3UM/UB230VAC/UM400/440VAC
837380 S3UM/UB230VAC/UM415/460VAC 837390 S3UM/UB230VAC/UM500/550VAC 839400 S1MN/24VACDC/2U
839410 S1MN/110VAC/2U 839415 S1MN/230VAC/2U 839420 S1MN/240VAC/2U 839425 S1MN/400VAC/2U
839600 S1MO/24VACDC/2U 839630 S1MO/110VAC/2U 839650 S1MO/230VAC/2U 839655 S1MO/240VAC/2U
839660 S1MO/400VAC/2U 839740 S1MS/110VAC/2U 839760 S1MS/230VAC/2U 839765 S1MS/240VAC/2U
839770 S1MS/400VAC/2U 839775 S1MS/24VACDC/2U 884100 S1EN 50KOhm 24-240VACDC 884110
S1EN200Kohm 24-240VACDC 890000 S1WP/9A/UB24VDC/UM0-120VACDC 890010 S1WP/9A/UB24VDC/UM0-
240VACDC 890020 S1WP/9A/UB24VDC/UM0-415VACDC 890030 S1WP/9A/UB24VDC/UM0-550VACDC 890040
S1WP/9A/UB110-230VACDC/UM0-120VACDC 890050 S1WP/9A/UB110-230VACDC/UM0-240VACDC 890060
S1WP/9A/UB110-230VACDC/UM0-415VACDC 890070 S1WP/9A/UB110-230VACDC/UM0-550VACDC 890100
S1WP/18A/UB24VDC/UM0-120VACDC 890110 S1WP/18A/UB24VDC/UM0-240VACDC 890120
