| Sensor Type | Physical Link | InStart Module | |----------------|---------------------|----------------------------| | 4-20 mA DP cell | 2-wire shielded | AI-8x12-bit analog input | | Radar (HART) | Same 2 wires + HART | HART multiplexer or built-in HART modem | | Ultrasonic (Modbus) | RS-485 (2-wire) | Serial RS-485 port | | Vibrating fork (switch) | Discrete (dry contact) | DI-8 DC input |