Module TM3, 24 IO relays. range of product: Modicon TM3 – product or component type: discrete I/O module – range compatibility: Modicon M221, Modicon M241, Modicon M251 – discrete input voltage: 24 V – discrete output type: relay normally open – discrete output logic: positive or negative – discrete output voltage: 24 V DC for relay output, 240 V AC for relay output.