4CH 20A Relay Switch Module (With Current Detection)
Model No:RL.04.20B
The 4CH 20A Relay Switch Module (With Current Detection) serves as a system switch execution unit, typically installed in a distribution box. It can control the switching of lights, the on/off state of devices, the on/off state of passive dry contacts, the opening and closing of strong or weak current curtains, the hot/cold valve of water-cooled air conditioning, and the switching between high/medium/low fan speeds.
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Wiring Diagram
Product Features
Rail-mounted installation
4-channel 20A relay switching
Circuit initial state setting
Delay control
Configurable interlock mode
Status feedback
Local control
Remote control
Scene control
Simple wiring
Control various types of lights
Fire alarm linkage
Fire-resistant material
Data detection
Mechanical strong cut off function
Online program update
YC-BUS protocol
RS485 protocol
Product Specifications
Operating Voltage
24VDC±10%
Maximum Power Consumption
≤3.2W
Rated Voltage
250/400VAC
Output Circuit
4-channel relay (built-in mutual inductance coil, accuracy 0.1A)
Relay
Hongfa single contact magnetic latching relay
Rated Current
20A (single channel),Surge current capability: 500A/2ms (single channel)
Switching Cycles
empty load：1,000,000times， load：30,000times
Protection
circuit breaker for each circuit
Operating Temperature
-5˚C~45˚C
Operating Relative Humidity
≤90%
Storage Temperature
-20˚C~60˚C
Storage Relative Humidity
≤93%
Dimensions（L*W*H）
72mm*102 mm*68 mm
Net Weight
≤316 g/pcs
Enclosure Material
flame retardant PP
Installation Methodg Current of Relay
standard 35mm DIN rail mounting
Dimension
The module uses a compact 4P DIN rail mounting structure
Software Presentation
ET-R0420AT1280
configuration software1280720
controlinterface1280
classroom
hotel
HA
Product Structure Description
By integrating with an intelligent lighting gateway, local switch control and remote switch control can be achieved. It can also be connected to HOMEASSISTANT.
Application Scenarios
Shenzhen Huayi Design Office Smart Lighting Control System 
