Contact closure alarm optical fiber converter

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{"cid":"107523","pid":"21087527","pimg_url":"\/\/img1.tradegrowthhub.com\/c7\/d2\/90a9e3e78904\/product\/70118650_s-w400xh400.jpg","name":"Simplex Intruder Alarm System 4 Channel Alarm Signal Contact Closure Above Fiber Burglar Above Fiber Supplement Relay Output Transmitter and Receiver","attrs":{"Price":"$36.67(1 - 4 Sets) $36.00(>=5 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"Sthanco or OEM"}}

{"cid":"107523","pid":"21087511","pimg_url":"\/\/img1.tradegrowthhub.com\/c7\/d2\/90a9e3e78904\/product\/70118596_s-w400xh400.jpg","name":"Intruder Alarm System 2 CH Switch Fiber Optic Converter Infrared Alarm to Fiber Changer Signal FC Port Fiber Transceiver Relay Closure Dry Contacts","attrs":{"Price":"$27.50(1 - 4 Sets) $27.00(>=5 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"Sthanco or OEM"}}

{"cid":"107523","pid":"21087494","pimg_url":"\/\/img1.tradegrowthhub.com\/c7\/d2\/90a9e3e78904\/product\/70118530_s-w400xh400.jpg","name":"Intruder Alarm System 1 Channel Contact Closure To Fiber Optic TTL Converter And Dry Contact Closure For IR Beam Detectors Intruder Alarm System","attrs":{"Price":"$25.67(1 - 4 Sets) $25.20(>=5 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"Sthanco or OEM"}}