SR2D101BD

The Schneider Electric SR2D101BD, also cataloged as the SR2D101BD Compact Smart Relay, operates as a dedicated hardware component for programmable relay logic execution within Zelio Logic automation systems. This 24 VDC controller provides 10 I/O points with screw-clamp terminals, relay outputs, ladder programming capability, and EEPROM program backup functions for simple control sequences.

Hardware Specifications

Parameter	Specification
Model	SR2D101BD
Brand	Schneider Electric
Product Series	Zelio Logic
Product Type	Compact Smart Relay
Origin	France
Weight	0.22 kg
Operating Temp	-20 to 55 deg C
Power Consumption	3 W
Supply Voltage	24 VDC
Supply Voltage Range	19.2 to 30 VDC
Maximum Supply Current	100 mA without extension
I/O Configuration	10 I/O
Discrete Inputs	6 IEC 61131-2 Type 1 inputs
Discrete Input Voltage	24 VDC
Discrete Input Current	4 mA
Counting Frequency	1 kHz
Relay Outputs	4 NO relay outputs
Relay Output Voltage	24 to 250 VAC / 5 to 30 VDC
Output Thermal Current	8 A per relay output
Ladder Program Capacity	240 ladder lines
Cycle Time	6 to 90 ms
Program Backup Memory	EEPROM flash memory, up to 10 years at 25 deg C
Clock	Without
Display	Without
Terminal Connection	Screw terminals
Protection Rating	IP20 terminal block, IP40 front panel

Profinet / EtherNet-IP Deterministic Networks and Firmware Flash Compatibility

The SR2D101BD uses the Zelio Logic embedded control architecture with internal EEPROM flash memory for application retention after power interruption. The controller executes ladder-based logic locally, with program verification performed during each power-up cycle. The firmware-controlled processing structure supports deterministic execution of discrete control sequences within the relay controller environment.

The module provides six discrete inputs and four relay outputs for direct field signal processing. Input compatibility includes 3-wire PNP proximity sensors, while relay channels provide switching control for connected electrical loads. The compact relay architecture supports DIN rail installation with screw terminal field wiring.

Frequently Asked Questions

Q: Does the SR2D101BD include a display or integrated clock function?
A: No. The SR2D101BD configuration does not include a local display or clock module.

Q: What type of output switching hardware is installed on the SR2D101BD?
A: The controller uses four normally open relay outputs with a rated thermal current of 8 A per output.

Q: How is the user program retained after power loss?
A: The module uses built-in EEPROM flash memory for program data backup, with retention specified up to 10 years at 25 deg C.

Field Installation Guidelines

Install the SR2D101BD on a suitable DIN rail mounting system and maintain separation between control wiring and high-current conductors. Use the specified screw terminal wiring range and apply correct terminal tightening procedures during installation.

Connect the 24 VDC supply with correct polarity. The controller includes reverse polarity protection, but field wiring should still be verified before energization. For relay output circuits, use appropriate external protection devices when switching inductive loads.

Maintain proper cabinet grounding and follow industrial EMC wiring practices. Keep signal cables separated from sources of electrical noise such as motor power lines and switching devices.

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