Model: 3503EC1
Function positioning:
3503EC1 Redundant input/output module, support dual channel hot backup, used for chemical, electric power and other key process control system signal acquisition and transmission.

2. Core functions and features
Redundant design
Dual channel hot backup: The 3503EC1 master module synchronizes data with the standby module in real time, and seamlessly switches over (handover time <10 ms) in case of failure, ensuring zero system downtime.

Self-diagnosis mechanism: 3503EC1 continuously monitors module health status (such as power supply, communication link), triggers alarm and switches to standby module when abnormal.

Signal processing capability
Input type: Support 4-20 mA, HART, RTD (thermal resistance), TC (thermocouple) and other signals, channel isolation voltage ≥1500 V DC.

Output type: 3503EC1 Redundant analog output (4-20 mA) or digital signal (DO), accuracy ±0.05% FS (full scale).

Communication and integration
Integration into DCS/PLC systems (such as Honeywell Experion PKS or Emerson DeltaV) to support protocols such as Foundation Fieldbus and Profibus PA.

High-speed communication with the controller through the backplane bus, support online module replacement (live plug and remove).

Parameter specification
Model: 3503EC1
Number of channels: 8/16 channels (analog input or output)
Resolution: 16-bit ADC / 14-bit DAC
Operating temperature: -40°C to +70°C
Supply voltage: 24 V DC ±10%, redundant dual power input
Certification standard: SIL 2/3, ATEX (explosion-proof optional)
4. Application Scenarios
Petrochemical: Reactor pressure/temperature redundancy monitoring, emergency shutdown system (ESD).

Power industry: Vibration monitoring and protection control of generator sets.

Pharmaceutical and water treatment: Redundant acquisition and closed-loop control of key process parameters.