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Continue to ChatTDR-QB-F-1D-N/06-24D - 24V DC, Double Key, 3NO/3NC, Brass, Q Type, Castell TDR Time Delay Remote Unit with Electrical Isolation https://www.pneutrol.com/industrialspares/product/tdr-qb-f-1d-n-06-24d-24v-dc-double-key-3no-3nc-brass-q-type-castell-tdr-time-delay-remote-unit-with-electrical-isolation/