SR2B121BD | compact smart relay Zelio Logic – 12 I O – 24 V DC – clock – display – Schneider Electric

Name: Zelio Logic Smart Relay SR2B121BD | 12 I/O, 24V DC, Clock & Display
Brand: Schneider Electric
SKU: SR2B121BD
Price: 120.67 EUR
Availability: InStock

SKU: SR2B121BD

Original price was: €262.33.Current price is: €120.67. Excl. GST

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Sourced through authorised channels, the Schneider Electric SR2B121BD relay from the Zelio Logic range delivers dependable performance for motor control and switching. Key ratings include 24V AC, IP20 (terminal block). myelectric.in stocks the SR2B121BD | compact smart relay Zelio Logic – 12 I O – 24 V DC – clock – display for contractors, panel builders, and project buyers — buy online with GST invoice, or request a bulk quote for domestic supply and export to UAE, Singapore, UK, USA, Sri Lanka and more.

📋 Technical Specifications

Product
Brand	Schneider Electric
Part Number / SKU	SR2B121BD
Category	Relay
Main
Range of product	Zelio Logic
Product or component type	Compact smart relay
Complementary
Local display	With
Number or control scheme lines	0…240 with ladder programming 0…500 with FBD programming
Cycle time	6…90 ms
Backup time	10 years at 25 °C
Clock drift	12 min/year at 0…55 °C 6 s/month at 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	3 W without extension
Reverse polarity protection	With
Discrete input number	8 conforming to IEC 61131-2 Type 1
Discrete input type	Resistive
Discrete input voltage	24 V DC
Discrete input current	4 mA
Counting frequency	1 kHz for discrete input
Voltage state 1 guaranteed	>= 15 V for I1…IA and IH…IR discrete input circuit >= 15 V for IB…IG used as discrete input circuit
Voltage state 0 guaranteed	<= 5 V for I1…IA and IH…IR discrete input circuit <= 5 V for 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	<= 0.5 mA (IB…IG used as discrete input circuit) <= 0.75 mA (I1…IA and IH…IR discrete input circuit)
Input compatibility	3-wire proximity sensors PNP for discrete input
Analogue input number	4
Analogue input type	Common mode
Analogue input range	0…10 V 0…24 V
Temperature probe type	NTC 10k at 25 °C NTC 1000k at 25 °C KTY81 210/220/221/222/250 Pt 500
Maximum permissible voltage	30 V for analogue input circuit
Analogue input resolution	8 bits
LSB value	39 mV for analogue input circuit
Conversion time	Smart relay cycle time for analogue input circuit
Conversion error	+/- 5 % at 25 °C for analogue input circuit +/- 6.2 % at 55 °C for analogue input circuit
Repeat accuracy	+/- 2 % at 55 °C for analogue input circuit
Operating distance	10 m between stations, with screened cable (sensor not isolated) for analogue input circuit
Input impedance	12 kOhm for IB…IG used as analogue input circuit 12 kOhm for IB…IG used as discrete input circuit 7.4 kOhm for I1…IA and IH…IR discrete input circuit
Number of outputs	4 relay
Output voltage limits	24…250 V AC (relay output) 5…30 V DC (relay output)
Contacts type and composition	NO for relay output
Output thermal current	8 A for all 4 outputs for relay output
Electrical durability	AC-12: 500000 cycles at 230 V, 1.5 A for relay output conforming to IEC 60947-5-1 AC-15: 500000 cycles at 230 V, 0.9 A for relay output conforming to IEC 60947-5-1 DC-12: 500000 cycles at 24 V, 1.5 A for relay output conforming to IEC 60947-5-1 DC-13: 500000 cycles at 24 V, 0.6 A for relay output conforming to IEC 60947-5-1
Switching capacity in mA	>= 10 mA at 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 for 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) for relay output 5 ms (from state 1 to state 0) for 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	0.5 N.m
Overvoltage category	III conforming to IEC 60664-1
Product weight	0.25 kg
Environment
Immunity to microbreaks	1 ms
Product certifications	GL CSA UL GOST C-Tick
Standards	IEC 61000-4-12 IEC 61000-4-4 level 3 IEC 61000-4-5 IEC 61000-4-11 IEC 61000-4-2 level 3 IEC 60068-2-6 Fc IEC 61000-4-6 level 3 IEC 60068-2-27 Ea IEC 61000-4-3
IP degree of protection	IP20 (terminal block) conforming to IEC 60529 IP40 (front panel) conforming to IEC 60529
Environmental characteristic	EMC directive conforming to IEC 61000-6-2 EMC directive conforming to IEC 61000-6-3 EMC directive conforming to IEC 61000-6-4 EMC directive conforming to IEC 61131-2 zone B Low voltage directive conforming to IEC 61131-2
Disturbance radiated/conducted	Class B conforming to EN 55022-11 group 1
Pollution degree	2 conforming to IEC 61131-2
Ambient air temperature for operation	-20…40 °C in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2 -20…55 °C conforming to IEC 60068-2-1 and IEC 60068-2-2
Ambient air temperature for storage	-40…70 °C
Operating altitude	2000 m
Maximum altitude transport	3048 m
Relative humidity	95 % without condensation or dripping water
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	6.500 cm
Package 1 Width	9.000 cm
Package 1 Length	10.000 cm
Package 1 Weight	239.000 g
Unit Type of Package 2	S03
Number of Units in Package 2	30
Package 2 Height	30.000 cm
Package 2 Width	30.000 cm
Package 2 Length	40.000 cm
Package 2 Weight	7.660 kg
Contractual warranty
Warranty (in months)	18

⚡ Key Features

Manufactured to IEC 60947-5-1 — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified, CE marked, RoHS compliant — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised Schneider Electric product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

🔗 Compatible Products & Accessories

The following genuine accessories and compatible devices are designed to work with this product. Contact myelectric.in for pricing and availability:

SR2CBL01SR2MEM02SR2COM01SR3MBU01BDSR3NET01BDTM1STNTCSF44015TM1STNTCSF44030TM1STNTCSN62050

❓ Frequently Asked Questions

Q: Can the SR2B121BD relay be mounted on a DIN rail socket for easy replacement?

A: This Schneider Electric relay typically requires direct panel or DIN rail wiring. For applications requiring frequent relay replacement, consider the plug-in relay variant of this series with a matching socket base.

Q: How do I test the SR2B121BD relay in the field without a signal source?

A: Most Schneider Electric relays can be manually forced using the test button (if fitted) — this mechanically closes the relay contacts without energising the coil, allowing functional testing of the controlled circuit. For coil testing, use a multimeter to measure coil resistance (typically 500–2000Ω for AC coils at rated voltage) and compare with datasheet values.