Product data sheet RE8TA21BU Characteristics industrial timing relay - 3..300s - type A - 24 V AC/DC, 110..240 V AC- 1 C/O Main Range of product Zelio Time Product or component Optimum industrial timing relay type Component name RE8 Time delay type A Time delay range 3...300 s [Us] rated supply 110...240 V AC, 50/60 Hz voltage 24 V AC/DC, 50/60 Hz Sale per indivisible 1 quantity Complementary Discrete output type Relay Contacts material Silver nickel contacts Width pitch dimension 22.5 mm Voltage range 0.9...1.1 Us Connections - terminals Screw terminals 2 x 1.5 mm², flexible cablewith cable end Screw terminals 2 x 2.5 mm², flexible cablewithout cable end Tightening torque 0.6...1.1 N.m Setting accuracy of time delay +/- 20 % of full scale Repeat accuracy < 1 % Voltage drift < 2.5 %/V Temperature drift < 0.2 %/°C Minimum pulse duration 26 ms Reset time 50 ms Maximum switching voltage 250 V Mechanical durability 20000000 cycles [Ith] conventional free air thermal current 8 A [Ie] rated operational current <= 2 A at 24 V, DC-13 for 70 °C conforming to IEC 60947-5-1/1991 <= 2 A at 24 V, DC-13 for 70 °C conforming to VDE 0660 <= 3 A at 24 V, AC-15 for 70 °C conforming to IEC 60947-5-1/1991 <= 3 A at 24 V, AC-15 for 70 °C conforming to VDE 0660 <= 0.1 A at 250 V, DC-13 for 70 °C conforming to IEC 60947-5-1/1991 <= 0.1 A at 250 V, DC-13 for 70 °C conforming to VDE 0660 <= 0.2 A at 115 V, DC-13 for 70 °C conforming to IEC 60947-5-1/1991 <= 0.2 A at 115 V, DC-13 for 70 °C conforming to VDE 0660 Minimum switching capacity 10 mA at 12 V Marking CE Overvoltage category III conforming to IEC 60664-1 [Ui] rated insulation voltage 250 V conforming to IEC 300 V conforming to CSA Supply disconnection value > 0.1 Uc Operating position Any position without derating factor Surge withstand 2 kV conforming to IEC 61000-4-5 level 3 Power consumption in VA 0.7 VA at 24 V 1.8 VA at 110 V 8.5 VA at 240 V Power consumption in W 0.5 W at 24 V Terminal description (15-16-18)OC_OFF (A1-B1)CO ALT 7/9/2011 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. Height 78 mm Width 22.5 mm Depth 80 mm Product weight 0.11 kg Environment Immunity to microbreaks 3 ms Standards EN/IEC 61812-1 Product certifications CSA GL UL Ambient air temperature for storage -40...85 °C Ambient air temperature for operation -20...60 °C Relative humidity 15...85 % 3K3 conforming to IEC 60721-3-3 Vibration resistance 0.35 mm 10...55 Hz conforming to IEC 60068-2-6 Shock resistance 15 gn (duration = 11 ms conforming to IEC 60068-2-27 IP degree of protection IP20 (terminals) IP50 (casing) Pollution degree 3 conforming to IEC 60664-1 Dielectric test voltage 2.5 kV Non-dissipating shock wave 4.8 kV Resistance to electrostatic discharge 6 kV in contact conforming to IEC 61000-4-2 level 3 8 kV in air conforming to IEC 61000-4-2 level 3 Resistance to electromagnetic fields 10 V/m conforming to IEC 61000-4-3 level 3 Resistance to fast transients 2 kV conforming to IEC 61000-4-4 level 3 Disturbance radiated/conducted CISPR11 group 1- class A CISPR22 - class A RoHS EUR status Compliant RoHS EUR conformity date 0624 2 Product data sheet RE8TA21BU Technical Description Function A: Delay on Energisation Description The timing period T begins on energisation. After timing, the output(s) R close(s). The second output can be either timed or instantaneous. Function: 1 Output Function: 2 Outputs 2 timed outputs (R1/R2) or 1 timed output (R1) and 1 instantaneous output (R2 inst.) Legend Relay de-energised Relay energised Output open Output closed C Control contact G Gate R Relay or solid state output R1/ 2 timed outputs R2 R2 The second output is instantaneous if the right position is selected inst. T Timing period Ta Adjustable On-delay Tr Adjustable Off-delay U Supply 3 Product data sheet RE8TA21BU Dimensions Drawings Width 22.5 mm Rail Mounting Screw Fixing 4 Product data sheet RE8TA21BU Connections and Schema Internal Wiring Diagram Recommended Application Wiring Diagram 5 Product data sheet RE8TA21BU Performance Curves Performance Curves A.C. Load Curve 1 Electrical durability of contacts on resistive loading millions of operating cycles X Current broken in A Y Millions of operating cycles A.C. Load Curve 2 Reduction factor k for inductive loads (applies to values taken from durability curve 1). X Power factor on breaking (cos ϕ) Y Reduction factor k Example: An LC1-F185 contactor supplied with 115 V/50 Hz for a consumption of 55 VA or a current consumption equal to 0.1 A and cos ϕ = 0.3. For 0.1 A, curve 1 indicates a durability of approximately 1.5 million operating cycles. As the load is inductive, it is necessary to apply a reduction coefficient k to this number of cycles as indicated by curve 2. For cos ϕ = 0.3: k = 0.6 The electrical durability therefore 6 becomes:1.5 10 operating cycles x 0.6 = 900 000 operating cycles. D. C. Load Limit Curve X Current in A Y Voltage in V 1 L/R = 20 ms 2 L/R with load protection diode 3 Resistive load 6