The WJ166 remote I/O module can be used to measure four encoder signals, and can also be set as an 8-channel
independent counter or DI status measurement.
1,Signal input
4-channel encoder signal input or 8-channel independent counter, can be connected to dry and wet contacts. Please
refer to the wiring diagram for details.
2,RS485/232 communication protocol
Communication interface: 1 standard RS-485 communication interface or 1 standard RS-232 communication
interface, please specify when ordering and selecting.
Communication Protocol: Supports two protocols, the character protocol defined by the command set and the
MODBUSRTUcommunication protocol. The module automatically recognizes communication
protocols and can achieve network communication with various brands of PLCs, RTUs, or computer
monitoring systems.
Data format: 10 digits. 1 start bit, 8 data bits, and 1 stop bit. No verification.
The communication address (0-255) and baud rate (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be set;
The communication network can reach a maximum distance of 1200 meters and is connected through
twisted pair shielded cables.
High anti-interference design of communication interface, ± 15KV ESD protection, communication response time
less than 100mS.
3,WiFi communication protocol
Communication interface: WiFi network interface. It can connect to WiFi in the local area network and then
connect to Ethernet.
Communication protocol: Supports MQTT protocol and can connect to various MQTT servers such asAlibaba
Cloud, Tencent Cloud, Huawei Cloud, China Mobile IoT OneNET, private cloud, etc. MODBUS TCP
protocol can also be used to achieve industrial Ethernet data exchange.
It also supports communication protocols such as TCP/UDP/WebSocket.
Network cache: 2K bytes (for both sending and receiving)
Communication response time: less than 10mS.
4,anti-interference
Checksums can be set as needed. There is a transient suppression diode inside the module, which can effectively
suppress various surge pulses, protect the module, and the internal digital filter can also effectively suppress power
frequency interference from the power grid