{"product_id":"allen-bradley-849-zod321-pneumatic-timing-relay","title":"Allen-Bradley 849-ZOD321 Pneumatic Timing Relay","description":"\u003cdiv\u003e\u003cp\u003eAllen-Bradley 849-ZOD321 is a Series B pneumatic timing relay from the Bulletin 849 family, designed to insert a timed delay into control circuits using an internal pneumatic bellows. Energizing the coil drives the mechanism to release air and advance a timing sequence, making it suitable for sequencing conveyors, presses, feeders, and other automation tasks where a precise delay is required between signals. The unit employs a pneumatic bellows constructed from synthetic rubber for reliable operation across typical industrial temperatures, and it switches loads rated up to 600 VAC on its contacts while the coil is rated for 120 VAC operation. This model aligns with Allen-Bradley's traditional 849-series timing relays, known for rugged, compact industrial timing in rugged environments. Note: this specific part is listed as discontinued by the manufacturer, which may affect availability and replacement options, so buyers typically source through surplus channels. In practice, it serves as a dedicated timing element that can coordinate start\/stop of downstream devices after a controlled delay, making it a fit for older automation retrofits, machine control panels, and archival systems that still rely on pneumatic timing hardware.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"New","offer_id":51657428468014,"sku":null,"price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_67d9e088-3ca8-4ce6-b477-6637303ec668.jpg?v=1769468863","url":"https:\/\/plgautomation.com\/products\/allen-bradley-849-zod321-pneumatic-timing-relay","provider":"PLG Automation ","version":"1.0","type":"link"}