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Relay Module BMP75M131

US$2.90

In stock

Quantity

90 pieces

Product ID

BMP75M131

When developing smart home appliances, such as controlling motors or desk lamps, it's necessary to control the power on/off for high voltage or alternating current (AC). However, handling high-voltage directly by humans is dangerous. This is where relays come into play. The BMP75M131 is a single-channel relay module that can safely handle high-voltage with maximum load current 5A at 28V_DC, 7A at 125V_AC, and 5A at 240V_AC.

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DESCRIPTION

A typical relay module uses an I/O signal to toggle its state. When there's a requirement to control eight relays, it will occupy eight I/O pins on the development board.

However, besides the I/O control mode, the BMP75M131 also provides networking mode. In networking mode, the development board can switch the states of each relay via I²C interface. Up to eight BMP75M131 relay modules can be cascaded concurrently, and only one module needs to be connected to the development board.
The operation mode can be selected by using the jumper on the BMP75M131. When cascading, the jumpers on each BMP75M131 module need to be disconnected (removed).

There is a BMCOM on the BMP75M131 designed for direct connection to the BMduino development board, such as BM53A367A. You can use the product with other development boards, such as Arduino UNO, as well.

Operation modes comparing

	I/O control mode	Networking mode
Mode selection (IO_mode Jumper)	Short-circuit the jumper.	Removed the jumper. When cascading, jumpers on each module need to be removed.
Cascading	Not cascadable. Require individual controlled.	Cascadable (up to eight modules) Only one module needs to be connected to the development board.
Development control	Control relays through I/O pins. Switch on relays in high level.	Issue commands through I²C interface to control each cascaded relay.

PRODUCT FEATURES

Input voltage: 3.0V~5.5V
Operating current:
- 110mA @5V (relay switched on)
- 3mA @5V (relay switched off)
Maximum load current:
- 5A @28V_DC
- 7A @125V_AC
- 5A @240V_AC
Operation mode: I/O control mode, Networking mode (select via jumper)
Provide cascaded interface, and can cascade up to 8 modules
Interface: I²C (address: 0x15)
Dimension: 50.11 x 29.5 x 20 mm
Net weight: 15.9g
Product includes: BMP75M131 x1, 2x2P header x1

HARDWARE OVERVIEW

PIN DESCRIPTION

Pin	Pin name	Function
1	NC	-
2	SCL	I²C: clock line
3	SDA/IO	I²C: data line I/O: relay control line
4	VDD	Power supply: 3.0V~5.5V
5	GND	Ground
6	GND	Ground
7	VDD	Positive power
8	ST_O	Cascade status output
9	TRX	Cascade single bus communication pin
10	VDD	Positive power
11	GND	Ground
12	ST_I	Cascade status input
13	TRX	Cascade single bus communication pin
14	NC	Relay close
15	COM	Relay common pin
16	NO	Relay open