... ±1V (S2T-DC24-ANT1)Working Voltage Range of Relay: AC110~240V or DC0~28VPCB Size: 68mm x ... = Normally Open.1) Press button 1: Turn on relay 1 (connect B and C, disconnect A and B ... )2) Press button 1 again: Turn off relay 1 (disconnect B and C, connect A ... and B)3) Press button 2: Turn on relay 2 (connect B and C, disconnect A and ... B)4) Press button 2 again: Turn off relay 2 (disconnect B and C, connect A ...