![381-BT GuardSwitch Series 381-BT GuardSwitch Series](https://cdn11.bigcommerce.com/s-ca10qrhzok/images/stencil/1192x250/i/apihvbvkt__12898.original.jpg)
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The 381-BT Series DPST safety interlock switch is designed for use with safety monitored relays or monitored circuits. To achieve the optimum Series 300 defeat resistant feature of the 381-BT, both the switch circuit (Circuit 1) and the tamper circuit (Circuit 2) must be connected.
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