PILZ皮尔兹安全继电器* 皮尔兹安全继电器工作原理 PILZ皮尔兹安全继电器* 774434 P2HZ X1 110VAC 3n/o 1n/c
774435 P2HZ X1 115VAC 3n/o 1n/c
774436 P2HZ X1 120VAC 3n/o 1n/c
774438 P2HZ X1 230VAC 3n/o 1n/c
774439 P2HZ X1 240VAC 3n/o 1n/c
774500 PNOZ XV2 30/24VDC 2n/o 2n/o t
774502 PNOZ XV2 3/24VDC 2n/o 2n/o t
774504 PNOZ XV2 0.5/24VDC 2n/o 2n/o fix
774505 PNOZ XV2 3/24VDC 2n/o 2n/o fix
774506 PNOZ XV2 10/24VDC 2n/o 2n/o fix
774508 PNOZ XV2 300/24VDC 2n/o 2n/o t
774510 PNOZ XV2.1 30/24VAC 24VDC 2n/o 2n/o t
774515 PNOZ XV2.1 30/120VAC 24VDC 2n/o 2n/o t
774516 PNOZ XV2.1 30/230VAC 24VDC 2n/o 2n/o t
774517 PNOZ X2.4V 1/24VDC 4n/o 1so fix
774520 PNOZ XV2.1 3/24VAC 24VDC 2n/o 2n/o t
774524 PNOZ XV2.1 3/115VAC 24VDC 2n/o 2n/o t
774525 PNOZ XV2.1 3/120VAC 24VDC 2n/o 2n/o t
774526 PNOZ XV2.1 3/230VAC 24VDC 2n/o 2n/o t
774530 PNOZ XV3.1 30/24VDC 3n/o 1n/c 2n/o t
774532 PNOZ XV3.1 3/24VDC 3n/o 1n/c 2n/o t
774534 PNOZ XV3.1 0.5/24 Vdc 3n/o 1n/c 2n/o fix
774536 PNOZ XV2.1 0.5/230 Vac 24 Vdc 2n/o 2n/o f
774538 PNOZ XV3.1 300/24VDC 3n/o 1n/c 2n/o t
774540 PNOZ XV3 30/24VDC 3n/o 2n/o t
774541 PNOZ XV3 300/24VAC 3n/o 2n/o t
774542 PNOZ XV3 3/24VDC 3n/o 2n/o t
774544 PNOZ XV3 0.5/24VDC 3n/o 2n/o t fix
774545 PNOZ XV3 3/24VDC 3n/o 2n/o t fix
774546 PNOZ XV2.1 3/230 Vac/24 Vdc 2n/o 2n/o fix
774547 PNOZ XV3 10/24VDC 3n/o 2n/o t fix
774548 PNOZ XV3 300/24VDC 3n/o 2n/o t
774549 PNOZ X13 24VDC 5n/o 1n/c
774550 PNOZ XV2.1 30/24-240VACDC 2n/o 2n/o t
774552 PNOZ XV2.1 3/24-240VACDC 2n/o 2n/o t
774554 PNOZ XV2.1 0.5/24-240 VacDC 2n/o 2n/o fix
774558 PNOZ XV2.1 300/24-240VACDC 2n/o 2n/o t
774560 PNOZ XHCV 0,7/24VDC 2n/o fix
774573 MOD PS 85-265 Vac
774578 PPS 100-240VAC / 24VDC
774580 PZE X4V 0,5/24VDC 4n/o fix
774581 PZE X4V 1/24VDC 4n/o fix
774582 PZE X4V 2/24VDC 4n/o fix
774583 PZE X4V 3/24VDC 4n/o fix
774584 PZE X4V8 24VDC 4n/o
774585 PZE X4 24VDC 4n/o
774586 PZE X4V 0,7/24VDC 4n/o fix
774590 PZE X5V 3/48VDC 5n/o fix
774592 PZE X5V 1.5/24VDC 5n/o fix
774593 PZE X5V 3/24VDC 5n/o fix
774595 PZE X5 24VDC 5n/o
774601 PNOZ X9 42VAC 24VDC 7n/o 2n/c 2so
774605 PNOZ X9 100-120VAC 24VDC 7n/o 2n/c 2so
774606 PNOZ X9 200-230VAC 24VDC 7n/o 2n/c 2so
774607 PNOZ X2.2 24VAC/DC 2n/o
774608 PNOZ X9 200VAC 24VDC -774606
774609 PNOZ X9 24VAC 24VDC 7n/o 2 n/c 2so
774610 PNOZ XV3.1 30/24-240VACDC 3nc 2no t
774612 PNOZ XV3.1 3/24-240VACDC 3nc 2no t
774618 PNOZ XV3.1 300/24-240VACDC 3nc 2no t
774638 END-XM
774639 KOP-XE
774640 KOP-XE coated
774662 PCANdn 24VDC
774665 CAN-CONNECT
774666 PCANop - HB
774667 PCANdn - HB
774700 PNOZ X10 24VAC 6n/o 4n/c 3LED
774701 PNOZ X10 42VAC 6n/o 4n/c 3LED
774703 PNOZ X10 110-120VAC 6n/o 4n/c 3LED
774706 PNOZ X10 230-240VAC 6n/o 4n/c 3LED
774709 PNOZ X10 24VDC 6n/o 4n/c 3LED
774721 PNOZ X6 42VAC 3n/o
774725 PNOZ X6 110-120VAC 3n/o
774726 PNOZ X6 230-240VAC 3n/o
774729 PNOZ X6 24VAC 24VDC 3n/o
774730 PNOZ X4 24VDC 3n/o 1n/c
774731 PNOZ X4 24VAC 3n/o 1n/c
774732 PNOZ X4 24 Vdc 3n/o 1n/c white box
774734 PNOZ X4 110VAC 3n/o 1n/c
774735 PNOZ X4 115VAC 3n/o 1n/c
774736 PNOZ X4 120VAC 3n/o 1n/c
774738 PNOZ X4 230VAC 3n/o 1n/c
774739 PNOZ X4 240VAC 3n/o 1n/c
774740 PNOZ X10.1 24 VAC 6n/o 4n/c 6LED
774741 PNOZ X10.1 42 VAC 6n/o 4n/c 6LED
774745 PNOZ X10.1 110-120VAC 6n/o 4n/c 6LED
774746 PNOZ X10.1 230-240VAC 6n/o 4n/c 6LED
774749 PNOZ X10.1 24VDC 6n/o 4n/c 6LED
774789 PNOZ V 3s 24VDC 3n/o 1n/c 1n/o （t）
774790 PNOZ V 30s 24VDC 3n/o 1n/c 1n/o （t）
774791 PNOZ V 300s 24VDC 3n/o 1n/c 1n/o （t）
775505 PU3Z 120-240VAC 3n/o 1n/c 6so
775510 PU3Z 24VDC 3n/o 1n/c 6so
775600 PNOZ 1 24VAC 3n/o 1n/c
775620 PNOZ 1 48VAC 3n/o 1n/c
775630 PNOZ 1 110-120VAC 3n/o 1n/c
775650 PNOZ 1 230-240VAC 3n/o 1n/c
775695 PNOZ 1 24VDC 3n/o 1n/c
775730 BUCH MASCHINENSICHERHEIT
775735 Buch Maschinensicherheit, spanisch
777053 PNOZ X7P 110-120VAC 2n/o
777056 PNOZ X7P 230-240VAC 2n/o
777059 PNOZ X7P 24VAC/DC 2n/o
777070 PNOZ 16SP 24VAC 24VDC 2n/o
777071 PNOZ 16SP 42VAC 24VDC 2n/o
777072 PNOZ 16SP 48VAC 24VDC 2n/o
777073 PNOZ 16SP 110VAC 24VDC 2n/o
777074 PNOZ 16SP 115VAC 24VDC 2n/o
777075 PNOZ 16SP 120VAC 24VDC 2n/o
777076 PNOZ 16SP 230VAC 24VDC 2n/o
777077 PNOZ 16SP 240VAC 24VDC 2n/o
777080 PNOZ X11P 24VAC 24VDC 7n/o 1n/c 2so
777083 PNOZ X11P 110-120VAC 24VDC 7n/o 1n/c 2so
777086 PNOZ X11P 230-240VAC 24VDC 7n/o 1n/c 2so
777100 PNOZ X1P 24VDC 3n/o 1n/c
777140 PZE 9P 24VACDC 8n/o 1n/c
777148 PZE 9P 24VACDC 100-240VACDC 8n/o 1n/c
777150 PZE X5P 24VDC 5n/o 2so
777300 PNOZ X2.9P 24VDC 3n/o 1n/c
777301 PNOZ X2.8P 24VACDC 3n/o 1n/c
777302 PNOZ X2.8P 24-240VAC/DC 3n/o 1n/c
777303 PNOZ X2P 24VACDC 2n/o
777304 PNOZ X2.3P 24VACDC 3n/o
777305 PNOZ X2.7P 24VACDC 3n/o 1n/c
777306 PNOZ X2.7P 24-240VAC/DC 3n/o 1n/c
777307 PNOZ X2P 48-240VACDC 2n/o
777308 PNOZ X2.5P 24VDC 2n/o 1so
777310 PNOZ X3P 24VDC 24VAC 3n/o 1n/c 1so
777313 PNOZ X3P 24-240VACDC 3n/o 1n/c 1so
777314 PNOZ X3.10P 24VACDC 3n/o 1n/c 1so
777330 P2HZ X1P 24VAC 3n/o 1n/c 2so
777331 P2HZ X1P 42VAC 3n/o 1n/c 2so
777332 P2HZ X1P 48VAC 3n/o 1n/c 2so
777340 P2HZ X1P 24VDC 3n/o 1n/c 2so
777341 P2HZ X1.10P 24VDC 3n/o 1n/c 2so
777354 P2HZ X4P 24VAC 3n/o 1n/c
777355 P2HZ X4P 24VDC 3n/o 1n/c
777434 P2HZ X1P 110VAC 3n/o 1n/c 2so
777435 P2HZ X1P 115VAC 3n/o 1n/c 2so
777436 P2HZ X1P 120VAC 3n/o 1n/c 2so
777438 P2HZ X1P 230VAC 3n/o 1n/c 2so
777439 P2HZ X1P 240VAC 3n/o 1n/c 2so
777500 PNOZ XV2P 30/24VDC 2n/o 2n/o t
777502 PNOZ XV2P 3/24VDC 2n/o 2n/o t
777503 PNOZ XV2P 1/24VDC 2n/o 2n/o fix
777504 PNOZ XV2P 0.5/24VDC 2n/o 2n/o fix
777510 PNOZ XV3P 30/24 VDC 3n/o 2n/o t
777511 PNOZ XV3.3P 30/24VDC 3n/o 2n/o t
777512 PNOZ XV3P 3/24 VDC 3n/o 2n/o t
777514 PNOZ XV3P 0.5/24VDC 3n/o 2n/o t fix
777515 PNOZ XV3P 3/24 Vdc 3n/o 2n/o t fix
777517 PNOZ XV3P 10/24 Vdc 3n/o 2n/o t fix
777518 PNOZ XV3P 300/24VDC 3n/o 2n/o t
777520 PNOZ XV3.1P 30/24VDC 3n/o 1n/c 2n/o t
777522 PNOZ XV3.1P 3/24VDC 3n/o 1n/c 2n/o t
777525 PNOZ XV3.1P 3/24VDC 3n/o 1n/c 2n/o t fix
777530 PNOZ XV3.1P 30/24-240VACDC 3nc 2no t
777532 PNOZ XV3.1P 3/24-240VACDC 3nc 2no t
777538 PNOZ XV3.1P 300/24-240VACDC 3nc 2no
777540 PNOZ XV2.1P 30/24-240VACDC 2n/o 2n/o t
777542 PNOZ XV2.1P 3/24-240VACDC 2n/o 2n/o t
777544 PNOZ XV2.1P 0.5/24-240 VacDC 2n/o 2n/o fi
777545 PNOZ XV2.1P 3/24-240 VacDC 2n/o 2n/o fix
777547 PNOZ XV2.1P 10/24-240 VacDC 2n/o 2n/o fix
777548 PNOZ XV2.1P 300/24-240VACDC 2n/o 2n/o t
777580 PZE X4VP 0,5/24VDC 4n/o fix
777581 PZE X4VP 1/24VDC 4n/o fix
777582 PZE X4VP 2/24VDC 4n/o fix
777583 PZE X4VP 3/24VDC 4n/o fix
777584 PZE X4VP8 24VDC 4n/o
777585 PZE X4P 24VDC 4n/o
777586 PZE X4VP4 24VDC 4n/o
777587 PZE X4.1P 24VDC 4n/o
777588 PZE X4.1P 24-240VAC/DC 4n/o
777600 PNOZ X2.1VP 0.75/24VDC 1so 2n/o fix
777601 PNOZ XV1P 3/24VDC 2n/o 1n/o t
777602 PNOZ XV1P 30/24VDC 2n/o 1n/o t
777606 PNOZ X9P 24VDC 100-240VACDC 7no 2nc 2so
777607 PNOZ X9P 12VDC 7n/o 2n/c 2so
777609 PNOZ X9P 24VDC 7n/o 2n/c 2so
777750 PNOZ X10.11P 24VDC 6n/o 4n/c 6LED
777760 PNOZ X8P 24 VDC 3n/o 2n/c 2so
777764 PNOZ X8P 110VAC 3n/o 2n/c 2so
777765 PNOZ X8P 115VAC 3n/o 2n/c 2so
777766 PNOZ X8P 120VAC 3n/o 2n/c 2so
777768 PNOZ X8P 230VAC 3n/o 2n/c 2so
777770 PNOZ X8P 24VAC 3n/o 2n/c 2so
777949 PSWZ X1P 0,5V /24-240VACDC 2n/o 1n/c 2so
777950 PSWZ X1P 3V /24-240VACDC 2n/o 1n/c 2so
777951 PSWZ X1P 0,0075-0,5V/24-240VACDC
778010 PMUT X1P 24VDC 3n/o 1n/c 5so
779000 PNOZmulti Tool-Kit
779110 PNOZmulti Bus-Terminator
779112 PNOZmulti Bus-Terminator coated
779120 PNOZpower Bus-Terminator
779125 PNOZ pe2p Bus-Interface
779200 PNOZmulti Chipcard Set 10 pieces 8kB
779201 PNOZmulti Chipcard 1 piece 8kB
779211 PNOZmulti Chipcard 1 piece 32kB
779212 PNOZmulti Chipcard Set 10 pieces 32kB
779230 Chip Card Reader
779240 PNOZmulti Chipcard Holder （Sparepart）
779250 PNOZmulti Seal 10 pieces
783100 Set spring terminals PNOZ m0p/m1p/m2p
783400 Set spring term mi1p/mi2p/mo1p/mo3p/ml1p
783520 Set spring terminals PNOZ mo2p
783536 Set spring terminals PNOZ mo4p/mo5p
783537 10 Set spring terminals PNOZ mo4p/mo5p
783700 Set spring terminals PNOZ mc1p/ma1p
783800 Set spring terminals PNOZms1p/ms2p
784130 PNOZ e1p C 24VDC 2so
784131 PNOZ e1vp C 10/24VDC 1so 1so t
784132 PNOZ e1vp C 300/24VDC 1so 1so t
784133 PNOZ e1.1p C 24VDC 2so
784135 PNOZ e2.2p C 24VDC 2so
784136 PNOZ e2.1p C 24VDC 2so
784137 PNOZ e3vp C 10/24VDC 1so 1so t
784138 PNOZ e3vp C 300/24VDC 1so 1so t
784139 PNOZ e3.1p C 24VDC 2so
784180 PNOZ e4.1p C 24VDC 2so
784181 PNOZ e4vp C 10/24VDC 1so 1so t
784190 PNOZ e5.11p C 24VDC 2so
784191 PNOZ e5.13p C 24VDC 2so
784192 PNOZ e6.1p C 24VDC 4n/o 2so
784193 PNOZ e6vp C 24VDC 4n/o 1so 1so t
787053 PNOZ X7P C 110-120VAC 2n/o
787056 PNOZ X7P C 230-240VAC 2n/o
787059 PNOZ X7P C 24VAC/DC 2n/o
787070 PNOZ 16SP C 24VAC 24VDC 2n/o
787071 PNOZ 16SP C 42VAC 24VDC 2n/o
787072 PNOZ 16SP C 48VAC 24VDC 2n/o
787073 PNOZ 16SP C 110VAC 24VDC 2n/o
787074 PNOZ 16SP C 115VAC 24VDC 2n/o
787075 PNOZ 16SP C 120VAC 24VDC 2n/o
787076 PNOZ 16SP C 230VAC 24VDC 2n/o
787077 PNOZ 16SP C 240VAC 24VDC 2n/o
787080 PNOZ X11P C 24VAC 24VDC 7n/o 1n/c 2so
787083 PNOZ X11P C 110-120VAC 7n/o 1n/c 2so
787086 PNOZ X11P C 230-240VAC 7n/o 1n/c 2so
787100 PNOZ X1P C 24VDC 3n/o 1n/c
787140 PZE 9P C 24VACDC 8n/o 1n/c
787148 PZE 9P C 24VACDC 100-240VACDC 8n/o 1n/c
787150 PZE X5P C 24VDC 5n/o 2so
787250 DUMMY MODULE PNOZ DM X2.7P/X2.8P C
787251 DUMMY MODULE PZE DM 9P C
787252 DUMMY MODULE PZE DM X4P C
787253 DUMMY MODULE PNOZ DM XV3.1P C
787254 DUMMY MODULE PZE DM X4VP C
787300 PNOZ X2.9P C 24VDC 3n/o 1n/c
787301 PNOZ X2.8P C 24VACDC 3n/o 1n/c
787302 PNOZ X2.8P C 24-240VAC/DC 3n/o 1n/c
787303 PNOZ X2P C 24VACDC 2n/o
787304 PNOZ X2.3P C 24VACDC 3n/o
787305 PNOZ X2.7P C 24VACDC 3n/o 1n/c
787306 PNOZ X2.7P C 24-240VAC/DC 3n/o 1n/c
787307 PNOZ X2P C 48-240VACDC 2n/o
787308 PNOZ X2.5P C 24VDC 2n/o 1so
787310 PNOZ X3P C 24VDC 24VAC 3n/o 1n/c 1so
787313 PNOZ X3P C 24-240VACDC 3n/o 1n/c 1so
787314 PNOZ X3.10P C 24VACDC 3n/o 1n/c 1so
787330 P2HZ X1P C 24VAC 3n/o 1n/c 2so
787331 P2HZ X1P C 42VAC 3n/o 1n/c 2so
787332 P2HZ X1P C 48VAC 3n/o 1n/c 2so
787340 P2HZ X1P C 24VDC 3n/o 1n/c 2so
787341 P2HZ X1.10P C 24VDC 3n/o 1n/c 2so
787354 P2HZ X4P C 24VAC 3n/o 1n/c
787355 P2HZ X4P C 24VDC 3n/o 1n/c
787434 P2HZ X1P C 110VAC 3n/o 1n/c 2so
787435 P2HZ X1P C 115VAC 3n/o 1n/c 2so
787436 P2HZ X1P C 120VAC 3n/o 1n/c 2so
787438 P2HZ X1P C 230VAC 3n/o 1n/c 2so
787439 P2HZ X1P C 240VAC 3n/o 1n/c 2so
787500 PNOZ XV2P C 30/24VDC 2n/o 2n/o t
787502 PNOZ XV2P C 3/24VDC 2n/o 2n/o t
787503 PNOZ XV2P C 1/24VDC 2n/o 2n/o fix
787504 PNOZ XV2P C 0.5/24VDC 2n/o 2n/o fix
787510 PNOZ XV3P C 30/24 VDC 3n/o 2n/o t
787511 PNOZ XV3.3P C 30/24VDC 3n/o 2n/o t
787512 PNOZ XV3P C 3/24 VDC 3n/o 2n/o t
787518 PNOZ XV3P C 300/24VDC 3n/o 2n/o t
787520 PNOZ XV3.1P C 30/24VDC 3n/o 1n/c 2n/o t
787522 PNOZ XV3.1P C 3/24VDC 3n/o 1n/c 2n/o t
787530 PNOZ XV3.1P C 30/24-240VACDC 3nc 2no
787532 PNOZ XV3.1P C 3/24-240VACDC 3nc 2no
787538 PNOZ XV3.1P C300/24-240VACDC 3nc 2no
787540 PNOZ XV2.1P C 30/24-240VACDC 2n/o 2n/o t
787542 PNOZ XV2.1P C 3/24-240VACDC 2n/o 2n/o t
787548 PNOZ XV2.1P C 300/24-240VACDC 2n/o 2n/o
787580 PZE X4VP C 0,5/24VDC 4n/o fix
787581 PZE X4VP C 1/24VDC 4n/o fix
787582 PZE X4VP C 2/24VDC 4n/o fix
787583 PZE X4VP C 3/24VDC 4n/o fix
787584 PZE X4VP8 C 24VDC 4n/o
787585 PZE X4P C 24VDC 4n/o
787586 PZE X4VP4 C 24VDC 4n/o
787587 PZE X4.1P C 24VDC 4n/o
787588 PZE X4.1P C 24-240VAC/DC 4n/o
787600 PNOZ X2.1VP C 0.75/24VDC 1so 2n/o fix
787601 PNOZ XV1P C 3/24VDC 2n/o 1n/o t
787602 PNOZ XV1P C 30/24VDC 2n/o 1n/o t
787606 PNOZ X9P C 24VDC 100-240VACDC 7no 2nc2so
787609 PNOZ X9P C 24VDC 7n/o 2n/c 2so
787750 PNOZ X10.11P C 24VDC 6n/o 4n/c 6LED
787760 PNOZ X8P C 24 VDC 3n/o 2n/c 2so
787764 PNOZ X8P C 110VAC 3n/o 2n/c 2so
787765 PNOZ X8P C 115VAC 3n/o 2n/c 2so
787766 PNOZ X8P C 120VAC 3n/o 2n/c 2so
787768 PNOZ X8P C 230VAC 3n/o 2n/c 2so
：唐玙昺
：
上海颖哲工业自动化设备有限公司
上海市黄浦区北京东路668号上海科技京城东楼20C2 一、继电器的工作原理和特性
继电器是一种电子控制器件，它具有控制系统（又称输入回路）和被控制系统（又称输出回路），通常应用于自动控制电路中，它实际上是用较小的电流去控制较大电流的一种“自动开关”。故在电路中起着自动调节、安全保护、转换电路等作用。
1、电磁继电器的工作原理和特性
电磁式继电器一般由铁芯、线圈、衔铁、触点簧片等组成的。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，从而产生电磁效应，衔铁就会在电磁力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（常开触点）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（常闭触点）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”。
2、热敏干簧继电器的工作原理和特性
热敏干簧继电器是一种利用热敏磁性材料检测和控制温度的新型热敏开关。它由感温磁环、恒磁环、干簧管、导热安装片、塑料衬底及其他一些附件组成。热敏干簧继电器不用线圈励磁，而由恒磁环产生的磁力驱动开关动作。恒磁环能否向干簧管提供磁力是由感温磁环的温控特性决定的。
3、固态继电器（SSR）的工作原理和特性
固态继电器是一种两个接线端为输入端，另两个接线端为输出端的四端器件，中间采用隔离器件实现输入输出的电隔离。
固态继电器按负载电源类型可分为交流型和直流型。按开关型式可分为常开型和常闭型。按隔离型式可分为混合型、变压器隔离型和光电隔离型，以光电隔离型为zui多。 二、继电器主要产品技术参数
1、额定工作电压
是指继电器正常工作时线圈所需要的电压。根据继电器的型号不同，可以是交流电压，也可以是直流电压。
2、直流电阻
是指继电器中线圈的直流电阻，可以通过万能表测量。
3、吸合电流
是指继电器能够产生吸合动作的zui小电流。在正常使用时，给定的电流必须略大于吸合电流，这样继电器才能稳定地工作。而对于线圈所加的工作电压，一般不要超过额定工作电压的1.5倍，否则会产生较大的电流而把线圈烧毁。
4、释放电流
是指继电器产生释放动作的zui大电流。当继电器吸合状态的电流减小到一定程度时，继电器就会恢复到未通电的释放状态。这时的电流远远小于吸合电流。
5、触点切换电压和电流
是指继电器允许加载的电压和电流。它决定了继电器能控制电压和电流的大小，使用时不能超过此值，否则很容易损坏继电器的触点。 继电器是一种电子控制器件，它具有控制系统（又称输入回路）和被控制系统（又称输出回路），通常应用于自动控制电路中，它实际上是用较小的电流去控制较大电流的一种“自动开关”。继电器的作用是 在电路中起着自动调节、安全保护、以弱控强，转换电路等作用。 固态继电器（solid state relay，SSR）是利用发光二极管等发光元件与一颗光晶体管等光接收元件作成之光耦合器，触发硅控整流体或双向硅控整流器，因此可以接受低压（DC或AC）信号输入，而驱动高压之输出，具隔离输出入及控制高功率输出之效果。固态继电器按负载电源类型可分为交流型和直流型。按开关型式可分为常开型和常闭型。按隔离型式可分为混合型、变压器隔离型和光电隔离型，以光电隔离型为zui多。 固态继电器开关速度快、工作频率高、使用寿命长、 噪声低和工作可靠。可取代常规电磁式继电器，被广泛用于数位程控装置。 德国皮尔兹PILZ继电器的种类和原理@ 磁簧继电器是以线圈产生磁场将磁簧管作动之继电器，为一种线圈传感装置。因此磁簧继电器之特征、小型尺寸、轻量、反应速度快、短跳动时间等特性。当整块铁磁金属或者其它导磁物质与之靠近的时候，发生动作，开通或者闭合电路。由*磁铁和干簧管组成。*磁铁、干簧管固定在一个不导磁也不带有磁性的支架上。以*磁铁的南北极的连线为轴线，这个轴线应该与干簧管的轴线重合或者基本重合。由远及近的调整*磁铁与干簧管之间的距离，当干簧管刚好发生动作（对于常开的干簧管，变为闭合；对于常闭的干簧管，变为断开）时，将磁铁的位置固定下来。这时，当有整块导磁材料，例如铁板同时靠近磁铁和干簧管时，干簧管会再次发生动作，恢复到没有磁场作用时的状态；当该铁板离开时，干簧管即发生相反方向的动作。 磁簧继电器结构坚固，触点为密封状态，耐用性高，可以作为机械设备的位置限制开关，也可以用以探测铁制门、窗等是否在位置
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