Google Reviews
TrustPilot Reviews
SR2B121BD
compact smart relay, Zelio Logic SR2 SR3, 12 IO, 24V DC, clock, display, 4 relay outputs
AVAILABLE
GET A QUOTE NOW
Click to view image 
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.
Read more
Read less
Read less
| Specification | Value |
|---|---|
| Contacts Type And Composition | NO relay output |
| 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 |
| Discrete Input Type | resistive |
| Number Of Outputs | 4 relay |
| Analogue Input Range | 0...10 V || 0...24 V |
| Conversion Error | +/- 5 % 25 °C analogue input circuit || +/- 6.2 % 55 °C analogue input circuit |
| Output Thermal Current | 8 A for all 4 outputs relay output |
| Discrete Input Voltage | 24 V DC |
| Number Or Control Scheme Lines | 0-240 ladder || 0-500 FBD |
| Lsb Value | 39 mV analogue input circuit |
| Backup Time | 10 years 25 °C |
| Clock Drift | 12 min/year 0-55 °C || 6 s/month 25-25 °C |
| Analogue Input Type | common mode |
| Discrete Input Current | 4 mA |
| 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) |
| Response Time | 10 ms from state 0 to state 1)relay output || 5 ms from state 1 to state 0)relay output |
| Clock | with |
| Power Dissipation In W | 3 W without extension |
| Local Display | with |
| Net Weight | 0.25 kg |
| [Uimp] Rated Impulse Withstand Voltage | 4 kV EN/IEC 60947-1 and EN/IEC 60664-1 |
| Voltage State 0 Guaranteed | <= 5 V I1...IA and IH...IR discrete input circuit || <= 5 V IB...IG used as discrete input circuit |
| Output Voltage Limits | 24...250 V AC relay output) || 5...30 V DC relay output) |
| Conversion Time | smart relay cycle time analogue input circuit |
| 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 |
| 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 |
| Analogue Input Number | 4 |
| Voltage State 1 Guaranteed | >= 15 V I1...IA and IH...IR discrete input circuit || >= 15 V IB...IG used as discrete input circuit |
| Input Compatibility | 3-wire proximity sensors PNP discrete input |
| 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) |
| Supply Voltage Limits | 19.2-30 V |
| Operating Distance | 10 m between stations, with screened cable (sensor not isolated) analogue input circuit |
| Overvoltage Category | III IEC 60664-1 |
| Mechanical Durability | 10000000 cycles relay output |
| Maximum Supply Current | 100 mA without extension) |
| Tightening Torque | 0.5 N.m |
| Temperature Probe Type | NTC 10k 25 °C || NTC 1000k 25 °C || KTY81 210/220/221/222/250 || Pt 500 |
| Switching Capacity In Ma | >= 10 mA 12 V relay output) |
| Analogue Input Resolution | 8 bits |
| Operating Rate In Hz | 0.1 Hz at Ie)relay output || 10 Hz no load)relay output |
| Counting Frequency | 1 kHz discrete input |
| Discrete Input Number | 8 IEC 61131-2 Type 1 |
| Cycle Time | 6-90 ms |
| Reverse Polarity Protection | with |
| Maximum Permissible Voltage | 30 V analogue input circuit |
| Repeat Accuracy | +/- 2 % 55 °C analogue input circuit |
| [Us] Rated Supply Voltage | 24 V DC |
| Checks | program memory on each power up |
| Range Of Product | Zelio Logic |
| Product Or Component Type | compact smart relay |
Read more
Read less
Read less
*New items come with up to 24 month Obso Warranty
Our previously used items and repair options come with 12 months Obso Warranty.
"Super service! Everything was processed very quickly and competently and the personal support was excellent. I would always choose Obso Automation again! Many thanks for the great support." - MJ
Our previously used items and repair options come with 12 months Obso Warranty.
"Super service! Everything was processed very quickly and competently and the personal support was excellent. I would always choose Obso Automation again! Many thanks for the great support." - MJ
*Same & Next Day Delivery & Collection is available for stock from our UK and NL branches. Next-day delivery collection and 2 day delivery is available for stock sourced from our partners. In 90% of cases, we can deliver faster than the manufacturer’s ETA where required.
Standard options for delivery are also available where required.
"Professional, courteous and accurate. Obsolete part quoted same day and supplied next" - PT
Standard options for delivery are also available where required.
"Professional, courteous and accurate. Obsolete part quoted same day and supplied next" - PT
We are ISO 9001 accredited so you have peace of mind with your purchase.
1
Step 1
Part added for enquiry
2
Step 2
Your personal Account Manager is already on it, delivering rapid responses and unbeatable service.
3
Step 3
We don’t just process orders—we guarantee smooth delivery, full transparency, and zero headaches.
4
Step 4
Our 10,000+ customers trust us for a reason. Get your quote now and experience automation without risk, delays, or uncertainty.
