K61-DL20 RS485 Remote Control Transmitter

K61-DL20 LoRa Remote Transmission Relay/Switch with RS485

The K61-DL20 is a cross-communication product consisting of two units: transmitter Tx (K61-40) and receiver Rx (K61-04). The transmitter features 4 digital inputs (sensors, switches, etc.) that wirelessly send data to the receiver (using LoRa spread spectrum) or through a network port, and the receiver outputs a 4-channel switching signal. It is ideal for remote control of devices like doors, pumps, lights, and more.

Technical Specifications:

• Model: K61-DL2
• DI input channels: 4 (0.7–30 V, no reverse protection)
• DO output channels: 4 (NO relay, 3 A max)
• Communication type: RS485
• Wireless connection type: wireless spread spectrum LoRa (SX1262)
• Wireless transmission power: 160 mW (22 dBm)
• Operating frequency: 410.125~493.125 MHz (default 410.125 MHz)
• Operating distance: 4000 m (in clear and open environments, maximum power, speed 2.4 K, antenna gain 5 dBi, feeder length 1 m). It is recommended that the actual distance for technical applications be less than or equal to 1000 m
• Transmission rate: 2.4~62.5 kb/s (default 4.8 kb/s)
• Receiving sensitivity: -138 dbm
• Refresh rate: If signal change is detected, trigger immediately (settling time 150 ms)
• Interface type: Digital switch type
• Waterproof: Not waterproof
• Operating voltage: DC 8~28 V
• Operating temperature: -40 °C ~ 85 °C
• Size: 110 x 84.32 x 25.3 mm (4.33 x 3.32 x 0.99 in)
• Weight: 164 ±5 g (5.78 ±0.18 oz)

Software: Network IO Configuration

Manual: K61-DL20 Module User Manual for Switch Value Transmission

Package Contents:

1x Transmitter Tx (K61-40)

1x Receiver Rx (K61-04)

2x Power Sources
1x USB to RS485
2x Antennas
2x DC Cables
1x Screwdriver