The SR2B122BD: The 4 analogue inputs share a common-mode input impedance of 12 kΩ, with a conversion time tied to the relay scan. Input compatibility is for 3-wire PNP proximity sensors on discrete channels, which are sinking 4 mA at 24 V DC. Transistor outputs are overload and overvoltage protected.
Schneider Electric SR2B122BD Zelio Logic Smart Relay, 8 DI 4
MPNSR2B122BD
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Schneider Electric Zelio Logic smart relay, SR2B122BD, 8 discrete inputs 24 V DC, 4 transistor outputs, 4 analogue inputs 0-10/0-24 V, cycle time 6...90 ms.
$74.93Ref. price · indicative, final on quote
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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
How we verify every order →Specifications
| Parameter | Value |
|---|---|
| Range of product | Zelio Logic |
| Analogue input type | Common mode |
| Discrete input type | Resistive |
| Temperature probe type | NTC 10k 77 °F (25 °C) NTC 1000k 77 °F (25 °C) KTY81 210/220/221/222/250 Pt 500 |
| Product or component type | Compact smart relay |
| Output voltage | 24 V transistor output |
| Output voltage limits | 19.2...30 V DC transistor output) |
| Supply voltage limits | 19.2...30 V |
| Discrete input voltage | 24 V DC |
| [Ures] residual voltage | 2 V at state 1 transistor output |
| Supply voltage | 24 V DC |
| Voltage state 0 guaranteed | = 1.2 mA IB...IG used as discrete input circuit) >= 2.2 mA I1...IA and IH...IR discrete input circuit) |
All specifications
| Parameter | Value |
|---|---|
| Voltage state 1 guaranteed | >= 15 V I1...IA and IH...IR discrete input circuit >= 15 V IB...IG used as discrete input circuit |
| Maximum permissible voltage | 30 V analogue input circuit |
| Load current | 0.5...0.625 A transistor output |
| Discrete input current | 4 mA |
| Maximum supply current | 100 mA without extension) |
| Short-circuit protection | With transistor output |
| Current state 0 guaranteed | <= 0.75 mA I1...IA and IH...IR discrete input circuit) |
| Power dissipation in | 3 W without extension |
| Counting frequency | 1 kHz discrete input |
| I/O channels | 4 transistor |
| IP degree of protection | IP20 IEC 60529 terminal block) IP40 IEC 60529 front panel) |
| 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 |
| Response time | <= 1 ms from state 1 to state 0)transistor output |
| Pollution degree | 2 IEC 61131-2 |
| Relative humidity | 95 % without condensation or dripping water |
| Operating altitude | 6561.68 ft (2000 m) |
| Maximum altitude transport | 10000 ft (3048 m) |
| Standards | IEC 60068-2-6 Fc IEC 61000-4-12 IEC 60068-2-27 Ea IEC 61000-4-6 level 3 IEC 61000-4-4 level 3 IEC 61000-4-5 IEC 61000-4-11 IEC 61000-4-3 IEC 61000-4-2 level 3 |
| Clock | With |
| Checks | Program memory on each power up |
| Category | US1000I22378 |
| LSB value | 39 mV analogue input circuit |
| Cycle time | 6...90 ms |
| Backup time | 10 years 77 °F (25 °C) |
| Clock drift | 12 min/year 32...131 °F (0...55 °C) 6 s/month 77 °F (25 °C) |
| Local display | With |
| Conversion time | Smart relay cycle time analogue input circuit |
| 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 |
| Repeat accuracy | +/- 2 % 131 °F (55 °C) analogue input circuit |
| Conversion error | +/- 5 % 77 °F (25 °C) analogue input circuit +/- 6.2 % 131 °F (55 °C) analogue input circuit |
| Tightening torque | 4.4 lbf.in (0.5 N.m) |
| Operating distance | 10 m between stations, with screened cable (sensor not isolated) analogue input circuit |
| Input compatibility | 3-wire proximity sensors PNP discrete input |
| Overload protection | With transistor output |
| Analogue input range | 0...24 V 0...10 V |
| Overvoltage category | III conforming to IEC 60664-1 |
| Analogue input number | 4 |
| Discrete input number | 8 IEC 61131-2 Type 1 |
| Overvoltage protection | With transistor output |
| Immunity to microbreaks | 1 ms |
| Analogue input resolution | 8 bits |
| Reverse polarity protection | With |
| 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 EN 55022-11 group 1 |
| Number or control scheme lines | 0...240 ladder 0...500 FBD |
| Ambient air temperature for storage | -40...158 °F (-40...70 °C) |
| Ambient air temperature for operation | -4...104 °F (-20...40 °C) in non-ventilated enclosure IEC 60068-2-1 and IEC 60068-2-2 -4...131 °F (-20...55 °C) IEC 60068-2-1 and IEC 60068-2-2 |
Product details
Frequently asked questions
What is the clock capability of the SR2B122BD?
The smart relay includes a real-time clock with a program memory check on each power-up. Clock drift is specified at 6 s/month at 25 °C.
What compliance standards does the SR2B122BD meet?
It complies with IEC 60068-2-6 (vibration), IEC 60068-2-27 (shock), IEC 61000-4-2/3/4/5/6/11/12 (EMC), and IEC 61131-2 (pollution degree 2, overvoltage category III).
MPN
SR2B122BD