The TRICONEX 3721 Analog Input Module supports a voltage range of 0-5V DC or -5 to +5V DC, 32 differential input channels, DC coupling, an input update rate of 10ms, programmable resolution of 12-bit or 14-bit, accuracy up to 0.15% of FSR (0-60℃), and common-mode rejection of -85 dB (DC-100Hz). It features 150 VDC/115 VAC continuous over-range protection, 420 kΩ inter-branch isolation resistance, and 140 kΩ power-off resistance (DC typical), meeting TMR (Triple Modular Redundancy) architecture requirements. It supports TriStation 1131 programming software (IEC 61131-3 standard language), is compatible with Modbus TCP/IP, RS-232/485 protocols, and can be seamlessly integrated with Tricon series I/O modules (such as the 3503E and 3660). Used for production line equipment coordination and process parameter monitoring (such as temperature, pressure, and flow), it is widely used in industries such as petrochemicals, power, water treatment, and pharmaceuticals. It supports expansion chassis (RXM) for remote I/O module connections within 7.5 miles (12 kilometers), suitable for linkage between distributed control systems (DCS) and SIS. Integrated into emergency shutdown (ESD) and fire and gas detection (F&G) systems, it ensures real-time monitoring of critical process parameters and fault-tolerant response.
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