Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display
Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display
Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display
Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display
Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display
Telemecanique Sensors

Telemecanique Sensors SR2B121BD Compact Smart Relay, 12 I/O, 24V DC, 4 Relay Outputs, with Clock and Display

  • MPN: SR2B121BD
  • PPN: SCH-SR2B121BD

CAD

$262.14

/ EA

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Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST

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Spec sheet

Description

This Zelio Logic SR2 compact smart relay / programmable controller uses a supply voltage of 24V direct current. It has 12 inputs / outputs with screw-clamp terminals, has an integrated clock and LCD display. 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.

Features

  • Equipped with 12 onboard I/O points consisting of 8 digital inputs and 4 relay outputs, this compact Zelio Logic smart relay is ideal for managing small-scale automation loops. Four of the digital inputs can be configured as high-resolution 0-10V analog inputs, allowing system integrators to monitor temperature sensors, pressure transducers.
  • Designed to operate on a stable 24V DC input voltage, this smart relay features a wide acceptable voltage tolerance to handle the charging and discharging cycles of backup battery systems and industrial power supplies. This makes it an excellent, resilient choice for remote telemetry stations, solar-powered water pumps, and critical backup infrastructure where utility AC power is unavailable or unreliable.

Documentation & Downloads

Specifications

Key Specifications

Range Of Product
Zelio Logic
Product Or Component Typecompact smart relay

Complementary

Contacts Type And Composition
NO relay output
Discrete Input Type
resistive
Analogue Input Range
0...10 V || 0...24 V
Output Thermal Current
8 A for all 4 outputs relay output
Number Or Control Scheme Lines
0-240 ladder || 0-500 FBD
Backup Time
10 years 25 °C
Analogue Input Type
common mode
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)
Clock
with
Local Display
with
[Uimp] Rated Impulse Withstand Voltage
4 kV EN/IEC 60947-1 and EN/IEC 60664-1
Output Voltage Limits
24...250 V AC relay output) || 5...30 V DC 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
Analogue Input Number
4
Input Compatibility
3-wire proximity sensors PNP discrete input
Supply Voltage Limits
19.2-30 V
Overvoltage Category
III IEC 60664-1
Maximum Supply Current
100 mA without extension)
Temperature Probe Type
NTC 10k 25 °C || NTC 1000k 25 °C || KTY81 210/220/221/222/250 || Pt 500
Analogue Input Resolution
8 bits
Counting Frequency
1 kHz discrete input
Cycle Time
6-90 ms
Maximum Permissible Voltage
30 V analogue input circuit
[Us] Rated Supply Voltage
24 V DC
Input Impedance12 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 Outputs4 relay
Conversion Error+/- 5 % 25 °C analogue input circuit || +/- 6.2 % 55 °C analogue input circuit
Discrete Input Voltage24 V DC
Lsb Value39 mV analogue input circuit
Clock Drift12 min/year 0-55 °C || 6 s/month 25-25 °C
Discrete Input Current4 mA
Response Time10 ms from state 0 to state 1)relay output || 5 ms from state 1 to state 0)relay output
Power Dissipation In W3 W without extension
Net Weight0.25 kg
Voltage State 0 Guaranteed<= 5 V I1...IA and IH...IR discrete input circuit || <= 5 V IB...IG used as discrete input circuit
Conversion Timesmart relay cycle time analogue input circuit
Connections - Terminalsscrew 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
Voltage State 1 Guaranteed>= 15 V I1...IA and IH...IR discrete input circuit || >= 15 V IB...IG used as 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)
Operating Distance10 m between stations, with screened cable (sensor not isolated) analogue input circuit
Mechanical Durability10000000 cycles relay output
Tightening Torque0.5 N.m
Switching Capacity In Ma>= 10 mA 12 V relay output)
Operating Rate In Hz0.1 Hz at Ie)relay output || 10 Hz no load)relay output
Discrete Input Number8 IEC 61131-2 Type 1
Reverse Polarity Protectionwith
Repeat Accuracy+/- 2 % 55 °C analogue input circuit
Checksprogram memory on each power up

Environment

Product Certifications
GL || CSA || UL || GOST || C-Tick
Disturbance Radiated/Conducted
class B EN 55022-11 group 1
Immunity To Microbreaks
1 ms
Ip Degree Of Protection
IP20 IEC 60529 terminal block) || IP40 IEC 60529 front panel)
Ambient Air Temperature For Storage
-40-70 °C
Maximum Altitude Transport
3048 m
StandardsIEC 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
Ambient Air Temperature For Operation-20-40 °C in non-ventilated enclosure IEC 60068-2-1 and IEC 60068-2-2 || -20-55 °C IEC 60068-2-1 and IEC 60068-2-2
Environmental CharacteristicEMC directive IEC 61000-6-2 || EMC directive IEC 61000-6-3 || EMC directive IEC 61000-6-4 || EMC directive IEC 61131-2 zone B || low voltage directive IEC 61131-2
Pollution Degree2 IEC 61131-2
Relative Humidity95-95 % without condensation or dripping water
Operating Altitude2000 m

Contractual warranty

Warranty
18 months

Offer Sustainability

Rohs Exemption Information
Yes
Environmental Disclosure
ENVPEP060406EN
Pvc Free
Yes
Weee
The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins
Circularity Profile
ENVEOLI0604006EN
Mercury FreeYes
Sustainable Offer StatusGreen Premium product
Reach RegulationReference contains Substances of Very High Concern above the threshold
China Rohs RegulationX
Eu Rohs DirectivePro-active compliance (Product out of EU RoHS legal scope)

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