Core Configuration

Channels: 32 differential, DC coupled, non-isolated analog inputs

Input range: 0–5VDC or 0–10VDC (software configuration)

Signal type: Voltage (can be externally connected to resistors for conversion to 4–20mA)

Architecture: TMR triple redundancy, 2oo3 voting, three-channel synchronous sampling

Resolution: 12 bits

Update cycle: 75ms

Diagnosis: Open circuit, short circuit, overrange, common-mode overlimit, voting failure

Maintenance: Hot-swappable, online replacement without stopping operation Electrical parameters

Module power supply: 5VDC (back panel)

Input impedance: ≥ 1MΩ

Common mode suppression: -80dB (DC–100Hz)

Common mode voltage: ±12V (peak)

Accuracy: ±0.25% FSR (0–60°C)

Temperature drift: ≤ ±0.005% FSR/°C

Overvoltage protection: continuous 150VDC / 115VAC

Operating temperature: –40°C ~ +70°C

Certifications: SIL3, CE, UL, CSA, ATEX Zone 2, TÜV

Power consumption: approximately 10W

Size / Weight: 273×213×25mm / 1.29kg

Key features (compared with 3700A/3703E)

32-channel dual-range: 0–5V/0–10V software selectable, covering more transmitters

Differential + high anti-interference: non-isolated but differential, common mode suppression -80dB, suitable for strong interference sites

TMR safety architecture: three-out-of-two voting, SIL3 safety level, data reliability

High-density slot saving: 32 points / card, twice the density of 3703E (16 points)

Wide temperature + hot-swappable: –40°C ~ +70°C, online maintenance does not affect interlock

Typical applications

SIS safety interlock: SIL3 level pressure, temperature, level, flow monitoring

Oil and gas / chemical: 32-point high-density transmitter collection, F&G fire and gas system analog quantity

Power / metallurgy: boiler / turbine parameters, key equipment vibration / displacement

Scenarios requiring high density, non-isolated, differential anti-interference voltage signals

Comparison with the same series AI (quick distinction)

3700A: 32 points 0–5V fixed, non-isolated, differential

3701: 32 points 0–10V fixed, non-isolated, differential

3704E: 32 points 0–5V/0–10V configurable, non-isolated, differential (general high-density)

3703E: 16 points 0–5V/0–10V/4–20mA, full isolation