Product Description – Schneider Electric Zelio Logic SR2D101BD Smart Relay Module

The Schneider Electric SR2D101BD module expands the capability of Zelio Logic controllers in compact automation environments. It delivers dependable 24V DC operation and offers additional I/O capacity for systems requiring simple sequencing, monitoring, or remote control. Moreover, its compact layout and DIN-rail design help installers integrate it quickly into small control cabinets with minimal wiring effort. The module works seamlessly with Zelio base units and supports stable performance in industrial and commercial facilities.

In addition, this extension module enhances small automation platforms by providing relay outputs that drive loads directly, therefore simplifying design for electricians and panel builders. Its robust screw-clamp terminals and protective features ensure consistent performance even when systems operate continuously in moderate industrial conditions.

Technical Specifications

Electrical

• Rated Supply Voltage: 24 V DC

• Supply Voltage Limits: 19.2–30 V

• Maximum Supply Current: 100 mA (without extension)

• Power Dissipation: 3 W

• Reverse Polarity Protection: Included

• Inputs: 6 digital inputs (24 V DC)

• Outputs: 4 relay outputs, SPST

• Output Rating AC: Up to 250 V AC, 8 A

• Output Rating DC: Up to 30 V DC, 8 A

• Isolation: Relay isolation between load and control circuits

Mechanical

• Mounting: DIN-rail or panel mounting

• Terminals: Screw-clamp terminals

• Tightening Torque: 4.4 lbf-in (0.5 N·m)

• Dimensions: 90 × 70 × 60 mm

• Net Weight: 0.22 kg

Environmental

• Operating Temperature: −20°C to +55°C

• Storage Temperature: −40°C to +70°C

• Relative Humidity: 5–95% non-condensing

• Protection Rating: IP20 housing, IP40 front panel when installed

• Overvoltage Category: III (IEC 60664-1)

• Backup Time: 10 years at 25°C

FAQ

Q1: Can the SR2D101BD operate independently without a base module?
No, the module must be used with a Zelio Logic SR2 or SR3 base controller.

Q2: Does this module require external programming?
Programming occurs through the base unit, so no direct programming is required for this extension.

Q3: Can the relay outputs drive small motors directly?
Yes, each relay supports up to 8 A, allowing direct switching of small motors or solenoid valves.

Q4: Is the module suitable for outdoor installations?
It is rated IP20/IP40, so it must be installed inside an enclosure for outdoor use.

Q5: How does it connect to the base controller?
The module attaches directly to the base unit through its integrated expansion connector.