SR2B121BD | Schneider Electric Zelio Logic 12 I/O 24 VDC Smart Relay Controller
Schneider Electric · PLCs & Industrial Controllers
Description The Schneider Electric SR2B121BD is a compact Zelio Logic smart relay designed for simple automation tasks requiring up to 12 discrete I/O points. Powered by 24 VDC, it features an integrated LCD display, onboard clock, and front-panel navigation keys for local monitoring and configuration. Its straightforward ladder or function-block programming makes it ideal for users who need an easy-to-implement control solution without the complexity of a full PLC. Technical Specifications Condition New/Never Used Surplus Brand Schneider Electric Category PLCs/Machine Control Part Number SR2B121BD Subcategory VDC Logic I/O Module Controller Type Smart relay / programmable relay Supply Voltage 24 VDC Number of Inputs 8 (analog/discrete) Number of Outputs 4 relay outputs Total I/O 12 points Output Current 8 A (relay) Output Type Relay contact Relay Type Solid-state compatible control relay Scan Rate 5 ms or 10 ms Programming Ladder (LAD) or Function Block Diagram (FBD) Communication Features Ethernet (via expansion module) Family Zelio Logic Series Zelio SR2 Series Mounting Type DIN rail Termination Screw terminals Display Integrated LCD with navigation keys Enclosure Rating IP40 front, IP20 terminals Operating Temperature –20°C to +55°C Dimensions 3.54 in L × 0.08 in D (width not specified) Application Small machine control, building automation, HVAC, lighting management Function Programmable relay controller For Use With Zelio Logic SR2/SR3 systems Information About SR2B121BD The SR2B121BD belongs to the Zelio Logic SR2 series, offering compact programmable control for small machines, building automation, and decentralized equipment. It provides eight inputs and four relay outputs accessible through screw terminals, enabling direct connection to sensors and actuators. The integrated display supports diagnostics, parameter adjustment, and status visualization, while DIN rail mounting allows quick installation in control cabinets. Typical applications include lighting control, HVAC functions, access systems, and basic process sequencing where a lightweight, flexible controller is preferred. Key Features 12 total I/O points: Includes 8 inputs and 4 relay outputs for small automation tasks. 24 VDC supply: Compatible with low-voltage control panels and auxiliary supplies. Integrated LCD & clock: Supports real-time operations and on-device configuration. Simple programming: Ladder and function-block programming through Zelio Soft 2. Screw-clamp terminals: Ensures reliable field wiring connections. DIN rail mounting: Compact design suitable for cabinet and panel integration. Ethernet communication option: Supports remote monitoring and expansion when used with compatible modules. The SR2B121BD delivers the reliability and precision required for compact automation, building control, and small machine applications.
Brand: Schneider Electric · Category: PLCs & Industrial Controllers
Key features
- 12 total I/O points: Includes 8 inputs and 4 relay outputs for small automation tasks.
- 24 VDC supply: Compatible with low-voltage control panels and auxiliary supplies.
- Integrated LCD & clock: Supports real-time operations and on-device configuration.
- Simple programming: Ladder and function-block programming through Zelio Soft 2.
- Screw-clamp terminals: Ensures reliable field wiring connections.
- DIN rail mounting: Compact design suitable for cabinet and panel integration.
- Ethernet communication option: Supports remote monitoring and expansion when used with compatible modules.
Specifications
| Manufacturer part number | SR2B121BD |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Schneider Electric |
| Category | PLCs/Machine Control |
| Part Number | SR2B121BD |
| Subcategory | VDC Logic I/O Module |
| Controller Type | Smart relay / programmable relay |
| Supply Voltage | 24 VDC |
| Number of Inputs | 8 (analog/discrete) |
| Number of Outputs | 4 relay outputs |
| Total I/O | 12 points |
| Output Current | 8 A (relay) |
| Output Type | Relay contact |
| Relay Type | Solid-state compatible control relay |
| Scan Rate | 5 ms or 10 ms |
| Programming | Ladder (LAD) or Function Block Diagram (FBD) |
| Communication Features | Ethernet (via expansion module) |
| Family | Zelio Logic |
| Series | Zelio SR2 Series |
| Mounting Type | DIN rail |
| Termination | Screw terminals |
| Display | Integrated LCD with navigation keys |
| Enclosure Rating | IP40 front, IP20 terminals |
| Operating Temperature | –20°C to +55°C |
| Dimensions | 3.54 in L × 0.08 in D (width not specified) |
| Application | Small machine control, building automation, HVAC, lighting management |
| Function | Programmable relay controller |
| For Use With | Zelio Logic SR2/SR3 systems |
| Product type | Сompact smart relay, Zelio Logic SR2 SR3, 12 IO, 24V DC, clock, display, 4 relay outputs |
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