Product overview
The SRE series IO products use a 100M backplane bus, with a scan cycle as short as 125μs. A single coupler can be expanded to 2048DI, 2048DO, 512AI and 512AO at most, which is suitable for high-speed, high-precision, multi-detection point real-time bus control applications. The SR series supports more than 70 types of modules. In addition to traditional digital and analog input/output modules, it also provides position acquisition modules, Ethernet/IP master modules, MODBUS master/slave modules, DeviceNet master/slave modules, and stepper motor drive modules, which can easily integrate fieldbus devices including CANopen, DeviceNet, Ethernet/IP, etc. into the EtherCAT system.

| Model | Description |
| SRE8200 Coupler | EtherCAT bus, 2 RJ45 ports, high-performance backplane bus, and it can expand up to 64 modules at most. |
| SRE9020 | -- |
| SRE1016 | 16-channel digital input, supporting PNP/NPN input. |
| SRE1032 | 32-channel digital input, supporting PNP/NPN input. |
| SRE2116 | 16-channel digital output, with NPN transistors, rated at 0VDC (±3V)/0.5A. |
| SRE2216 | 16-channel digital output, with PNP transistors, rated at 24VDC/0.5A. |
| SRE2132 | 32-channel digital output, with NPN transistors, rated at 0VDC (±3V)/0.5A, and the total current of a single module does not exceed 10A. |
| SRE2232 | 32-channel digital output, with PNP transistors, rated at 24VDC/0.5A, and the total current of a single module does not exceed 10A. |
| SRE5202 | Digital fast output module, with DC distributed clock and oversampling function, the maximum output frequency is 1MHz, 2 outputs, with PNP transistors, rated at 24VDC/0.5A. |
| SRE5204 | Digital fast output module, with DC distributed clock and oversampling function, the maximum output frequency is 1MHz, 4 outputs, with PNP transistors, rated at 24VDC/0.5A. |
| SRE1332 | 16-channel NPN input, 16-channel output with NPN transistors. |
| SRE1432 | 16-channel PNP input, 16-channel output with PNP transistors. |
| SRE3522 | Two-channel analog fast acquisition module |
| SRE3204 | 4-channel voltage/current input, with a precision of 16 bits. |
| SRE3208 | 8-channel voltage/current input, with a precision of 16 bits. |
| SRE4204 | 4-channel voltage/current output, ±10V or 0~20mA, with a precision of 16 bits. |
| SRE4208 | 8-channel voltage/current output, ±10V or 0~20mA, with a precision of 16 bits. |
| SRE3284 | 4-channel thermocouple input module. |
| SRE3274 | 4-channel thermal resistance input module. |
| SRE9001 | Power relay module |
| SRE6002 | Serial port module, with 2 RS422/RS232/RS485 interfaces, supporting Modbus RTU and free port protocols, and the maximum baud rate is 115.2Kbps. |
| SRE6004 | Serial port module, with 4 RS422/RS232/RS485 interfaces, supporting Modbus RTU and free port protocols, and the maximum baud rate is 115.2Kbps. |
| SRE5012 | 2-channel high-speed counting module, with 2 groups of A, B, C counting inputs, single-ended (rated at 24V, maximum 200KHZ, supporting PNP/NPN input) or differential (5V, maximum 4MHZ), and supporting ordinary counting function. |
| SRE5034 | 4-channel high-speed counting module, with 4 groups of A, B, C counting inputs, differential (5V, maximum 4MHZ), and supporting ordinary counting function. |