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Aiphone Corporation RY-PA Door Release Relay for LEF Series, ABS Plastic ConstructionAiphone Corporation RY-AP Door Release Relay for LEF series. Door release activation. N/O contact output.Features of Aiphone Corporation RY-PA Door Release Relay for LEF Series, ABS Plastic Construction Surface Mount Box for AX-DM, GT-D, IF-DA, JF-D, JF-DA, JK-DA, ..