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8Thermocouple Robust Modbus RS-485 Remote I/O 8ch thermocouple(can be set to voltage or current). Operation temperature:-40~85°C,Power input:10VDC~48VDC. Noise protection: 4kV surge(power),4kV EFT,8 kV ESD protection. Interface: RS-485/USB. 3000VDC isolation protection. LED indicator to monitor I/O status.