What the ratings mean for fit
The 6ES7144-4FF00-0AB0: Rated 24 V DC, draws 1.1 W typical from backplane and up to 45 mA from supply. Input resistance 100 kΩ. Cycle time 267 ms; suited for slow processes. Diagnostics and group error SF LED included.
Mounting and wiring
Dimensions: 45 mm wide, 130 mm high, 35 mm deep. Spring-cage terminals. Shielded cable up to 30 m. Isolation tested at 500 V DC between inputs and MANA; no channel-to-channel isolation; common-mode voltage stay within 5 Vpp. Reverse polarity protection built in.