This Zelio Logic SR2 compact smart relay / programmable controller uses a supply voltage of 24V direct current. It has 20 inputs / outputs with screw-clamp terminals. It has compact design, allowing installation on DIN rail. It also offers simple programming, display and diagnosing of malfunctions display and navigation buttons. Its simple ladder programming makes it adapted for non-specialists. Specifications Main range of product Zelio Logic Product or component type Compact smart relay Complementary Local display With Number or control scheme lines 0…240 ladder 0…500 FBD Cycle time 6…90 ms Backup time 10 years 77 °F (25 °C) Clock drift 12 min/year 32…131 °F (0…55 °C) 6 s/month 77 °F (25 °C) Checks Program memory on each power up [Us] rated supply voltage 24 V DC Supply voltage limits 19.2…30 V Maximum supply current 100 mA without extension) Power dissipation in W 6 W without extension Reverse polarity protection With Discrete input number 12 IEC 61131-2 Type 1 discrete input type Resistive Discrete input voltage 24 V DC Discrete input current 4 mA Counting frequency 1 kHz discrete input Voltage state 1 guaranteed >= 15 V I1...IA and IH...IR discrete input circuit >= 15 V IB...IG used as discrete input circuit Voltage state 0 guaranteed <= 5 V I1...IA and IH...IR discrete input circuit <= 5 V IB...IG used as discrete input circuit Current state 1 guaranteed >= 1.2 mA IB...IG used as discrete input circuit) >= 2.2 mA I1...IA and IH...IR discrete input circuit) Current state 0 guaranteed <= 0.75 mA I1...IA and IH...IR discrete input circuit) <= 0.75 mA IB...IG used as discrete input circuit) Input compatibility 3-wire proximity sensors PNP discrete input analogue input number 6 analogue input type Common mode Analogue input range 0...24 V 0...10 V Temperature probe type NTC 10k 77 °F (25 °C) NTC 1000k 77 °F (25 °C) KTY81 210/220/221/222/250 Pt 500 Maximum permissible voltage 30 V analogue input circuit analogue input resolution 8 bits LSB value 39 mV analogue input circuit Conversion time Smart relay cycle time analogue input circuit Conversion error +/- 5 % 77 °F (25 °C) analogue input circuit +/- 6.2 % 131 °F (55 °C) analogue input circuit Repeat accuracy +/- 2 % 131 °F (55 °C) analogue input circuit Operating distance 10 m between stations, with screened cable (sensor not isolated) analogue input circuit Input impedance 12 kOhm IB...IG used as analogue input circuit 12 kOhm IB...IG used as discrete input circuit 7.4 kOhm I1...IA and IH...IR discrete input circuit Number of outputs 8 relay Output voltage limits 24...250 V AC relay output) 5...30 V DC relay output) Contacts type and composition NO relay output Output thermal current 8 A for all 8 outputs relay output Electrical durability AC-12 500000 cycles 230 V, 1.5 A relay output IEC 60947-5-1 AC-15 500000 cycles 230 V, 0.9 A relay output IEC 60947-5-1 DC-12 500000 cycles 24 V, 1.5 A relay output IEC 60947-5-1 DC-13 500000 cycles 24 V, 0.6 A relay output IEC 60947-5-1 Switching capacity in mA >= 10 mA 12 V relay output) Operating rate in Hz 0.1 Hz at Ie)relay output 10 Hz no load)relay output Mechanical durability 10000000 cycles relay output [Uimp] rated impulse withstand voltage 4 kV EN/IEC 60947-1 and EN/IEC 60664-1 clock With Response time 10 ms from state 0 to state 1)relay output 5 ms from state 1 to state 0)relay output Connections - terminals Screw terminals, 1 x 0.2...1 x 2.5 mm² AWG 25...AWG 14) semi-solid Screw terminals, 1 x 0.2...1 x 2.5 mm² AWG 25...AWG 14) solid Screw terminals, 1 x 0.25...1 x 2.5 mm² AWG 24...AWG 14) flexible with cable end Screw terminals, 2 x 0.2...2 x 1.5 mm² AWG 24...AWG 16) solid Screw terminals, 2 x 0.25...2 x 0.75 mm² AWG 24...AWG 18) flexible with cable end Tightening torque 4.43 lbf.in (0.5 N.m) Overvoltage category III IEC 60664-1 Net weight 0.84 lb(US) (0.38 kg)