Product Overview of the SR3B261BD Smart Relay
The Schneider Electric SR3B261BD belongs to the Zelio Logic range of modular smart relays. It provides 26 I/O points for compact automation tasks. Specifically, this controller integrates 16 digital inputs and 10 relay outputs. Because six inputs are configurable as analog, the unit handles mixed-signal applications directly. An integrated real-time clock supports time-based control sequences. Meanwhile, the LCD with navigation buttons enables on-site parameter review. This smart relay suits machine control, lighting management, and building automation. The SR3B261BD operates from a 24V DC supply within a 19.2–30V range.
Technical Specifications and I/O Architecture
The SR3B261BD provides a verified I/O configuration for precise system design. Digital inputs follow IEC 61131-2 Type 1 at 24V DC. Relay outputs carry 5 A per output for direct load switching. The table below summarizes key electrical and physical parameters.
- I/O points: 26 total
- Digital inputs: 16 (6 configurable as analog, 24V DC)
- Digital outputs: 10 relay, 5 A per output
- Supply voltage: 24V DC (19.2–30V)
- Program memory: 240 lines ladder / 500 blocks FBD
- Mounting: 35 mm DIN rail
- Dimensions: 90 × 124.6 × 59.5 mm
- Weight: 0.30 kg
Comparison with Similar Control Categories
Unlike fixed-configuration relays, the SR3B261BD offers expandable communication via extension modules. Compared to micro PLCs, it provides a simpler ladder/FBD environment. However, it lacks the higher I/O density of rack-based systems. For 26-point applications, this smart relay balances cost and capability.
Relay Output Durability and Environmental Range
Relay output life depends on load type and switching frequency. The SR3B261BD achieves 10,000,000 mechanical cycles. Electrically, it delivers 500,000 cycles at AC-12, 230V 1.5A per IEC 60947-5-1. Therefore, inductive loads require external protection to preserve contact life. The operating temperature range spans -20 to 55 °C. Consequently, the unit suits most industrial cabinets without additional cooling.
Integration and Communication Options
The SR3B261BD communicates through extension modules. Supported options include Ethernet (SR3NET01BD) and RS485. However, the base unit does not include these interfaces. For network integration, verify module compatibility with your control architecture. Additionally, the integrated real-time clock enables scheduled operations without external timers.
Availability & Condition at AutoDCSTech
| Part Number | SR3B261BD |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | France |
