High speed counter module M340, 2 channels. range of product: Modicon M340 automation platform – product or component type: counter module – counting frequency: <= 60000 Hz - input compatibility: 2-wire/3-wire proximity sensor 19.2...30 V, incremental encoder with push-pull outputs 10...30 V totem pole - input voltage: 24 V DC type 3 - output voltage: 24 V DC.