Schneider SR2A201BD

Product Overview

Schneider SR2A201BD is a compact smart relay (programmable logic controller) from the Zelio Logic SR2 series, used for the management, remote control, and monitoring of simple automation systems. It is an upgraded replacement for the SR1‑A201BD, offering enhanced functions. Suitable for industrial and commercial applications, it is an ideal alternative to traditional relay logic control and dedicated control cards.

2. Core Parameters Summary

3. Dimensions & Physical Features

Dimensions: Standard DIN‑rail mount, width approx. 70 mm, height approx. 90 mm, depth approx. 60 mm (subject to official data)

Weight: approx. 0.38 kg

Terminals: Screw‑clamp terminals, reliable connection, easy maintenance

Mounting recommendation: 15 mm standard galvanized steel DIN rail (e.g., Schneider AM1DE200)

4. Replacement & Compatibility
5. Direct replacement: SR1‑A201BD (discontinued)
6. Same‑series replacements / upgrades:

SR2A201FU: 24VDC, 20I/O, with display, no clock (functionally identical, minor differences possible)

SR2A201E: 24VDC, 20I/O, no display, no clock

SR2B201BD: 24VDC, 20I/O, with display, with real‑time clock

3. Cross‑series compatibility: Can be used with SR3 series extension modules to expand I/O and functions.
4. Recommended Accessories

6. Applications

Industrial automation: Small production lines, material handling, packaging machinery

Commercial buildings: Lighting control, HVAC control, access control

Infrastructure: Pump control, compressor management, wastewater treatment

Others: Vending machines, lift control, agricultural automation

7. Programming & Troubleshooting

Programming Features

Supports Ladder Diagram (LD) and Function Block Diagram (FBD) per IEC 61131‑3

Built‑in EEPROM: program and data retained for 10 years after power loss

Program memory self‑test on power‑up

Common Faults

1. Power fault: Check 24VDC supply and polarity (reverse protected)
2. Input not responding: Verify signal type/voltage, check wiring
3. Output not operating: Check load within rating, inspect output contacts
4. Program lost: Reload via Zelio Soft 2, check backup battery (if fitted)
5. Display abnormal: Power cycle, check ambient temperature
6. Selection Notes
7. Confirm supply voltage 24VDC matches field power
8. I/O: 12 inputs / 8 outputs (including 2 analog)
9. Output type: Relay output suitable for AC/DC loads; observe current limits
10. Display: LCD aids on‑site commissioning and diagnostics
11. Clock: No clock on this model; choose SR2B201BD for timing functions

Complete Guide to Schneider SR2A201BD Replacements

1. Core Replacement Overview

Schneider SR2A201BD is a compact Zelio Logic SR2 smart relay. Below is a complete list of replacements sorted by type and functional differences for quick selection.

2. Detailed Replacement List
3. Direct Replacement (Identical Function)

2. Same‑Series Functional Replacements

3. Voltage / Output Type Replacements

4. Upgrade Replacements (Expanded Functions)

3. Replacement Selection Guide

4. Replacement Notes
5. Software compatibility: All SR2 models work with Zelio Soft 2; programs portable
6. Mounting compatibility: Standard DIN‑rail, same dimensions (~70×90×60 mm)
7. Wiring compatibility: Identical terminal layout, no rewiring needed
8. Function check: Clock, display, analog input count must match application
9. Spare parts: Prefer SR2A201FU / SR2B201BD for long‑term availability

Schneider SR2A201BD Programming Software

The official programming software for Schneider SR2A201BD is Zelio Soft 2 (latest version: v5.4.2.2). It is a free configuration and programming tool developed by Schneider Electric for Zelio Logic smart relays (SR2 and SR3 series), used for managing, monitoring, and controlling simple automation systems.

1. Core Software Information

2. Key Features
3. Multi‑language programming

Supports Ladder (LD) and FBD (IEC 61131‑3)

Built‑in function library: logic, timers, counters, comparators, math

2. Debug & simulation

Offline simulation without hardware

Online monitoring of I/O, variables, and execution

Breakpoint debugging

3. Project management

Upload / download programs

Data backup; EEPROM retention 10 years

Auto‑generated documentation

4. Diagnostics

I/O, program, and communication fault detection

Status, error codes, event logs

3. Compatibility & Usage Notes
4. Series compatibility

Full support for SR2 series (SR2A201BD, SR2B201BD, SR2D201BD, etc.) and SR3 modular smart relays

Imports and converts SR1 series (e.g., SR1‑A201BD) programs

2. Connection requirements

Use only SR2‑USB01; standard USB cables not supported

Install driver (included in setup)

Unit must be powered (24VDC) for programming

3. Limitations

No SFC (Sequential Function Chart) support

Program limits: Ladder ≤120 lines, FBD ≤200 lines

No serial link to HMI (e.g., Magelis/Harmony)

4. Installation Steps
5. Disable antivirus/firewall temporarily
6. Run installer and follow wizard
7. Connect SR2‑USB01 and install driver
8. Launch software, create or open project
9. Alternatives & Upgrades

Complete Model Guide for Schneider Zelio Logic SR2 Series

The Schneider Zelio Logic SR2 series is a product line of compact smart relays, designed specifically for simple automation systems. It offers three fixed I/O configurations: 10/12/20 points, with various combinations of power supply, display, clock, and analog inputs to meet different application requirements. Below is a detailed list of all series models classified by function:

1. Model Naming Rules (Quick Identification)

SR2 [Function Code] [I/O Points] [Voltage Code]

Function Code:

A: With LCD display, no clock

B: With LCD display, with real-time clock

D: No LCD display, no clock

E: With LCD display, more analog inputs, no clock

I/O Points: 10, 12, 20

Voltage Code:

BD: 24 VDC

FU: 100–240 VAC

JD: 12 VDC

2. Complete Model List for SR2 Series (Classified by I/O Points)
3. 10 I/O Points Models (6DI + 4RO, no analog input)

2. 12 I/O Points Models (8DI + 4RO, basic version with 2AI)

3. 20 I/O Points Models (12DI + 8RO, standard version with 2AI)

3. Special Models & Accessories
4. Special Output Type Models

SR2A201BD-DO: 24 VDC, 20 I/O, with display, no clock, 8 transistor outputs (instead of relay), suitable for high-speed DC loads

SR2B121BD-DO: 24 VDC, 12 I/O, with display and clock, 4 transistor outputs

2. Extension Module Compatibility

All SR2 series models can work with SR3XT series extension modules to expand I/O points and functions:

SR3XT02BD: 2 digital input extension

SR3XT04BD: 4 digital output extension (relay)

SR3XT02AI: 2 analog input extension

SR3XT01AO: 1 analog output extension

SR3XTCOM: Communication extension module (supports Modbus RTU)

3. Programming & Mounting Accessories

4. Selection Quick Reference

All SR2 series models are compatible with Zelio Soft 2 programming software. Programs can be directly ported between different models in the same series. Mounting dimensions are uniform (approx. 70×90×60 mm), facilitating system upgrade and maintenance.