16-Channel RS485 Relay Module Modbus RTU DC 12V PLC Controller
16-Channel RS485 Relay Module Modbus RTU DC 12V PLC Controller
16-Channel DC 12V RS485 Relay Module — Modbus RTU PLC Controller
Take full command of your automation setup with the APWIKOGER 16-Channel RS485 Relay Module. Engineered for industrial and DIY applications alike, this Modbus RTU-compatible relay board delivers rock-solid switching control for PLCs, PTZ cameras, motors, LED systems, and more — all over a long-range RS485 serial connection.
Made in China.
Key Features
- 16 Independent Relay Channels: Simultaneously control up to 16 devices or circuits, making it ideal for complex automation workflows and multi-device switching tasks.
- RS485 Communication Interface: Long-distance, noise-resistant serial communication ensures dependable remote control across extensive installations with up to 64 devices connected in parallel.
- 12V DC Operation: Fully compatible with low-voltage DC systems, providing versatile integration into a wide range of control panels and automation enclosures.
- 6 Control Instruction Modes: Supports "On," "Off," "Instantaneous," "Self-Lock," "Interlock," and "Delay" commands for flexible, application-specific switching logic.
- Dual Command Modes: Compatible with both MODBUS RTU commands and AT commands via any serial port terminal or Modbus Poll software.
- Configurable Baud Rates: Jumper-selectable baud rates: 2400, 4800, 9600 (default), and 19200 BPS.
- Extended Delay Support: Maximum delay of 255 seconds in Modbus mode; up to 9999 seconds in AT command mode.
- DIN Rail Box Included: Comes with a DIN rail enclosure for clean, secure panel mounting in professional installations.
- High Load Capacity: Rated for 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, and 10A/12VDC per channel.
- Easy Setup: Straightforward design with clear labeling ensures quick installation and configuration, even for users with limited technical experience.
Technical Specifications
| Channels | 16 |
| Power Supply | DC 12V |
| Communication Protocol | Modbus RTU / AT Commands via RS485 |
| Default Baud Rate | 9600 BPS (selectable: 2400 / 4800 / 9600 / 19200) |
| Max Devices in Parallel | 64 |
| Max Load per Channel | 10A / 250VAC; 10A / 30VDC |
| Standby Current | 13 mA (all relays closed); ~27 mA per additional open relay |
| PCB Dimensions | 180 × 72 × 20 mm (7.09 × 2.83 × 0.67 in) |
| With DIN Rail Box | 184 × 88 × 42 mm (7.18 × 3.43 × 1.64 in) |
| EU LVD Voltage | Low voltage: Below 50V AC or 75V DC |
| Origin | Made in China |
What's in the Box
- 1 × RS485 16-Channel Relay Module (PCB only)
- 1 × RS485 16-Channel Relay Module (with DIN Rail Box)
Common Applications
- PLC (Programmable Logic Controller) automation systems
- PTZ camera control and surveillance infrastructure
- Motor control and conveyor systems
- LED and lighting control panels
- Industrial serial port switching
- Smart home and building automation
Note: Due to monitor calibration and lighting conditions, the actual product color may vary slightly from images. Please allow ±1–2 cm measurement tolerance.
For general guidance on safe electrical practices and low-voltage systems, refer to the OSHA Electrical Safety Resource.
Frequently Asked Questions
Q: What communication protocol does this RS485 relay module support?
A: This relay board supports both Modbus RTU and AT commands, allowing it to integrate with standard PLC systems, serial port terminals, and Modbus Poll software. The default baud rate is 9600 BPS, with jumper-selectable options of 2400, 4800, and 19200 BPS.
Q: How many devices can be connected to this relay module simultaneously?
A: In Modbus RTU command mode, up to 64 devices can be connected in parallel over the RS485 bus, making this module highly scalable for large automation installations.
Q: Is this relay module compatible with PTZ cameras and LED systems?
A: Yes. The 16-channel RS485 relay module is specifically designed to control a wide variety of devices, including PTZ cameras, motors, LED lighting systems, and PLC-driven equipment, providing reliable switching with up to 10A load capacity per channel.
Q: Does the module come with a DIN rail mounting enclosure?
A: Yes. The package includes both the bare PCB board and a version fitted in a DIN rail box (184 × 88 × 42 mm), making it easy to mount securely in standard electrical panels and control cabinets.