Description
Description
The BMZ-02R1-E is a professional 2-channel relay output module designed specifically for industrial automation, PLC signal amplification, and control system interfacing. Unlike generic open-frame relay boards, this module features a compact plastic enclosure with integrated DIN-rail mounting, making it suitable for installation in control cabinets, machine tool panels, and industrial equipment racks.
Each channel is equipped with a high-quality Songchuan relay featuring SPDT (Single Pole Double Throw) changeover contacts, capable of switching loads up to 10A at 250V AC or 30V DC. The module provides optocoupler isolation between the control inputs and the relay outputs, ensuring galvanic separation that protects your PLC or microcontroller from voltage spikes, back EMF, and ground loop noise.
A key feature of the BMZ-02R1-E is its wide input compatibility — it accepts both NPN (sinking) and PNP (sourcing) control signals within the 3.3V to 5V range. This makes it an ideal signal amplifier board for 3.3V microcontrollers (ESP32, Raspberry Pi Pico, STM32) and 5V systems (Arduino, PLCs) alike, allowing low-voltage logic to safely switch high-power industrial loads.
Common applications include CNC machine peripheral control (brakes, valves, lighting), industrial automation systems, PLC output expansion, and signal isolation for sensitive electronics.
Features
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2 independent relay channels with optocoupler isolation
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High-quality Songchuan brand relays (SPDT changeover contacts)
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Wide control signal range: 3.3V – 5V DC (compatible with NPN and PNP)
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Industrial plastic enclosure with DIN-rail mounting capability
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Galvanic isolation between control side and load side
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Screw terminals for both control inputs and load connections
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LED indicators per channel for visual status
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Suitable for NPN (sinking) and PNP (sourcing) PLC outputs
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Compact dimensions for control cabinet installation
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Rated for up to 10A resistive load per channel
Technical Parameters
| Parameter | Value |
|---|---|
| Number of Channels | 2 |
| Control Signal Voltage | 3.3V – 5V DC |
| Module Power Supply | 24V DC (typical industrial supply) |
| Input Compatibility | NPN (sinking) or PNP (sourcing) |
| Relay Type | Songchuan SPDT (1 Form C) |
| Maximum Load Current | 10A (resistive load at 250V AC / 30V DC) |
| Optocoupler Isolation | Yes (galvanic isolation) |
| Mounting | DIN-rail (35mm) |
| Dimensions | Approx. 50mm × 86mm × 40mm |
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