Main characteristics of the Zelio Schneider PLC reference SR2B122BD: Range: Zelio Logic Type of product or equipment: Compact intelligent relay Additional local display: With number of control diagram lines: 0?240 with Ladder programming 0?500 with FBD time programming cycle: 6?90 ms backup time: 10 years at 25 °C clock drift: 12 min/year at 0?55 °C6 s/month at 25 °C checks: Program memory at each power-up [Us] supply voltage: 24 V DC Limits of the supply voltage: 19.2?30 V maximum supply current: 100 mA (without extension) power dissipated in W: 3 W without extension reverse polarity protection: With number of digital inputs: 8 conforming to EN/IEC 61131-2 type 1 Type of digital input: Resistive digital input voltage: 24 V DC digital input current: 4 mA counting frequency: 1 kHz for digital input voltage state 1 guaranteed: >= 15 V for digital input circuit I1 to IA and IH to IR>= 15 V for IB to IG used as digital input circuit state 0 voltage guaranteed: <= 5 V for digital input circuit I1 to IA and IH to IR<= 5 V for IB to IG used as digital input circuit current state 1 guaranteed: >= 1.2 mA (IB to IG used as digital input circuit)>= 2.2 mA (digital input circuit I1 to IA and IH to IR) current state 0 guaranteed: <= 0.75 mA (digital input circuit I1 to IA and IH to IR) digital input compatibility: PNP proximity switches 3-wire for digital input Number of analog inputs: 4 Type of analog input: Common mode Analog input range: 0...24 V0...10 V maximum admissible voltage: 30 V for analog input circuit Analog input resolution: 8 bits LSB value: 39 mV for analog input circuit conversion time: Intelligent relay cycle time for analog input circuit conversion error: +/- 5% to 25 °C for analog input circuit +/- 6.2% at 55 °C for analog input circuit repetition accuracy: +/- 2% at 55 °C for analog input circuit operating range: 10 m between stations, with a shielded cable (non-insulated sensor) for analog input circuit input impedance: 12 kOhm for IB to IG used as analog input circuit12 kOhm for IB to IG used as digital input circuit7.4 kOhm for digital input circuit I1 to IA and IH to IR Number of outputs: 4 transistor output voltage: 24 V transistor output output voltage limits: 19.2?30 V DC (transistor output) load current: 0.5?0.625 A transistor output [Ures] residual voltage: 2 V at phase 1 transistor output overload protection: With overload protection for transistor output short circuit protection: With transistor output overvoltage protection: With overvoltage protection for output clock transistor: With response time: <= 1 ms (from phase 0 to phase 1) for transistor output <= 1 ms (from phase 1 to phase 0) for transistor output Connection method: Screw terminals, 1 x 0, 2 to 1 x 2.5 mm² (AWG 25 to AWG 14) semi-solid Screw terminals, 1 x 0.2 to 1 x 2.5 mm² (AWG 25 to AWG 14) solid Screw terminals, 1 x 0.25 to 1 x 2.5 mm² (AWG 24?AWG 14) flexible with ferrule Screw terminals, 2 x 0.2 to 2 x 1.5 mm² (AWG 24 to AWG 16) rigid Screw terminals, 2 x 0.25 to 2 x 0.75 mm² (AWG 24 to AWG 18) flexible with ferrule Tightening torque: 0.5 N.m Overvoltage category: III conforming to EN/IEC 60664-1 Product weight: 0.22 kg