意大利ELTRA意爾創編碼器*
軸或軸孔與驅動的伺服電機同軸連接（也有與絲杠同軸連接的，是分離型編碼器），電機或機械部分旋轉時帶著編碼器軸同步旋轉，編碼器就可以給出幾個均勻的脈沖串序列-----A、B、A-、B- 等電氣信號，而且轉一圈給出的各個脈沖串的脈沖總數是固定的數n。這樣，一個脈沖對應著軸轉動了360/n度的機械角位移，只要計數相關的脈沖個數，就可以實現角位移的測量。脈沖串可以有2列----A列和B列，還可以在加上他們各自的反相脈沖串序列。除此之外，還有Z脈沖------每轉一圈，在某個確定的位置，給出一個Z脈沖，此Z脈沖可以看做就是剛剛轉過的那一圈的標志。
和PLC結合使用時隨便取A,B,Z中的一相都可以-----只取Z相是不行的。只取A、B，或者都取是可以的，把他們輸入到plc的高速計數器接口內即可對脈沖計數，就是相當于對角位移測量反饋了。Z相是有特殊用途的，但不是單獨用于反饋計數的 

意大利ELTRA意爾創編碼器*

EAM58CR4096/4096B8/28PPX10X3MER
EAM58CR4096/4096B8/28PPX10X3MER.5M
EAM58CR4096/4096B8/28PPX10X3PER
EAM58CR4096/4096G8/28PPX10S3MER
EAM58CR4096/4096G8/28PPX10S3PER
EAM58CR4096/4096G8/28SXX10S3PCA
EAM58CR4096/4096G8/28SXX10S3PCR
EAM58CR4096/4096G8/28SXX10S3PER
EAM58CR4096/4096G8/28SXX10X3PCA
EAM58CR4096/4096G8/28SXX10X3PCR
EAM58CR4096/4096G8/28SXX8S3PCR
EAM58CR4096/8192B8/28PP10X6PER
EAM58CR4096/8192G8/28SXX10X3HAR.1027
EAM58CR4096/8192G8/28SXX10X3MCR
EAM58CR4096/8192G8/28SXX10X6MCR
EAM58FR128/1024G8/28SXX10S3MCR
EAM58FR128/1024GB/28SXX10S3MCR
EAM63A2048/32G8/28PPX10S3MER
EAM63A256/256G8/28PPX10X6MAR

EAM63AR4096/4096G8/28SXX10X3PR
EAM63AR4096/8192B12/28FXX10S3P3R
EAM63AR64/1024G8/28PPX10S3MER
EAM63AR64/4096B8/28PPX10X3PER
EAM63D4096/4096G8/28PPX10X3PER
EAM63DR4/4096B8/28FXX10X6P3R
EAM63DR4096/4096G8/28PPX10X3PDR
EAM63DR4096/4096G8/28PPX10X3PER
EAM63DR4096/4096G8/28PPX10X6PER
EAM63DR4096/4096G8/28PRX10X6PER
EAM63ER4096/1024B12/28FXX10X6P3R
EAM63G4096/4096B8/28FXX15X3P3R
EAM63GR4096/4096B12/28FXX15X3P3R
EAM63GR4096/4096G8/28PPX10X3PDA
EAM90A4096/4O96B12/28FXX8X3P3R
EAM90AR32/512G8/28PPX10X6MER
EAM90AR4096/4096B12/28FXX8X3P3R
EAM90AR512/512G5SXX10X3PCR
EC100H38-H6TR-1024

EC58C10-H6PR-1024
EDS345-1-250-000
EF49P4P2000Z5L12X3PR.779
EF49P6BC1000Z5L8X3PR.711
EF49P6BC500Z5L8X3PR.711