Product data sheet SR2B121FU Characteristics compact smart relay Zelio Logic - 12 I O - 100..240 V AC - clock - display Product availability: Stock - Normally stocked in distribution facility Main Range of product Zelio Logic Product or component Compact smart relay type Complementary Local display With Number or control scheme lines 0...500 with FBD programming 0...240 with ladder programming Cycle time 6...90 ms Backup time 10 yearsat 77 F (25 C) Clock drift 6 s/monthat 77 F (25 C) 12 min/yearat 32...131 F (0...55 C) Checks Program memory on each power up Us rated supply voltage 100...240 V AC Supply voltage limits 85...264 V Supply frequency 50/60 Hz Supply current 30 mAat 240 V (without extension) 80 mAat 100 V (without extension) Power consumption in VA 7 VA without extension Isolation voltage 1780 V Protection type Against inversion of terminals (control instructions not executed) Discrete input number 8 Discrete input voltage 100...240 V AC Discrete input current 0.6 mA Discrete input frequency 47...53 Hz 57...63 Hz Voltage state 1 guaranteed >= 79 Vfor discrete input Voltage state 0 guaranteed <= 40 Vfor discrete input Current state 1 guaranteed >= 0.17 mA for discrete input Current state 0 guaranteed <= 0.5 mA for discrete input Input impedance 350 kOhm (discrete input) Number of outputs 4 relay output(s) Output voltage limits 24...250 V AC 5...30 V DC (relay output) Contacts type and composition NO relay output Output thermal current 8 A for all 4 outputs (relay output) Aug 15, 2019 1 The information provided in this documentation contains general descriptions and/or technical characteristics of the performance of the products contained herein. This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications. It is the duty of any such user or integrator to perform the appropriate and complete risk analysis, evaluation and testing of the products with respect to the relevant specific application or use thereof. Neither Schneider Electric Industries SAS nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein.Electrical durability 500000 cycles AC-12at 230 V, 1.5 Afor relay output conforming to EN/IEC 60947-5-1 500000 cycles AC-15at 230 V, 0.9 Afor relay output conforming to EN/IEC 60947-5-1 500000 cycles DC-12at 24 V, 1.5 Afor relay output conforming to EN/IEC 60947-5-1 500000 cycles DC-13at 24 V, 0.6 Afor relay output conforming to EN/IEC 60947-5-1 Switching capacity in mA >= 10 mAat 12 V (relay output) Operating rate in Hz 0.1 Hz (at Ie)for relay output 10 Hz (no load)for relay output Mechanical durability 10000000 cycles (relay output) Uimp rated impulse withstand voltage 4 kV conforming to 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 50 ms with ladder programming (from state 0 to state 1) discrete input 50 ms with ladder programming (from state 1 to state 0) discrete input 50...255 ms with FBD programming (from state 0 to state 1) discrete input 50...255 ms with FBD programming (from state 1 to state 0) discrete input Connections - terminals Screw terminals, clamping capacity: 1 x 0.2...1 x 2.5 mm AWG 25...AWG 14 se- mi-solid Screw terminals, clamping capacity: 1 x 0.2...1 x 2.5 mm AWG 25...AWG 14 sol- id Screw terminals, clamping capacity: 1 x 0.25...1 x 2.5 mm AWG 24...AWG 14 flexible with cable end Screw terminals, clamping capacity: 2 x 0.2...2 x 1.5 mm AWG 24...AWG 16 sol- id Screw terminals, clamping capacity: 2 x 0.25...2 x 0.75 mm AWG 24...AWG 18 flexible with cable end Tightening torque 4.42 lbf.in (0.5 N.m) Overvoltage category III conforming to EN/IEC 60664-1 Product weight 0.55 lb(US) (0.25 kg) Environment Immunity to microbreaks <= 10 ms Product certifications CSA C-Tick GL GOST UL Standards EN/IEC 60068-2-27 Ea EN/IEC 60068-2-6 Fc EN/IEC 61000-4-11 EN/IEC 61000-4-12 EN/IEC 61000-4-2 level 3 EN/IEC 61000-4-3 EN/IEC 61000-4-4 level 3 EN/IEC 61000-4-5 EN/IEC 61000-4-6 level 3 IP degree of protection IP20 (terminal block) conforming to IEC 60529 IP40 (front panel) conforming to IEC 60529 Environmental characteristic EMC directive conforming to EN/IEC 61000-6-2 EMC directive conforming to EN/IEC 61000-6-3 EMC directive conforming to EN/IEC 61000-6-4 EMC directive conforming to EN/IEC 61131-2 zone B Low voltage directive conforming to EN/IEC 61131-2 Disturbance radiated/conducted Class B conforming to EN 55022-11 group 1 Pollution degree 2 conforming to EN/IEC 61131-2 Ambient air temperature for operation -4...104 F (-20...40 C) in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2 -4...131 F (-20...55 C) conforming to IEC 60068-2-1 and IEC 60068-2-2 Ambient air temperature for storage -40...158 F (-40...70 C) Operating altitude 6561.68 ft (2000 m) Altitude transport <= 10000 ft (3048 m) Relative humidity 95 % without condensation or dripping water 2