I. Core Parameters (Official Standard Version of AI6700)

1) Basic Specifications

Model: AI6700 (Analog Input, 8 Ch, High Precision, TMR)

Number of Channels: 8 channels / module (differential, point-to-point isolation)

Signal Type (Software Programmable):

Current: 4–20mA, 0–20mA, ±320mA

Voltage: 0–5V, ±5V, ±10V

Resolution: 16 bits

Accuracy: ±0.05% reading + ±0.05% range (high precision level)

Response Time: <1ms (full channel high-speed synchronization)

Input Impedance: Current 250Ω; Voltage ≥10MΩ (differential)

Isolation: Field ↔ System 1500VAC; Channel-to-channel complete isolation

Diagnosis: Open circuit / short circuit / overrange, FVD, overvoltage / overcurrent, fuse blowout

Safety Level: SIL3 (IEC 61508, TÜV Certification)

Redundant Architecture: TMR triple redundancy (three-channel independent sampling, median voting)

Power Supply: 24VDC (backplane power supply)

Power Consumption: Approximately 12W

Operating Temperature: -40℃ ~ +70℃

Certifications: CE, UL, CSA, ATEX/IECEx, TÜV SIL3

Installation: Trident chassis slot (19 inches)

Matching Terminal Board: 9761-210 (8-point isolated terminal board)

Matching Cable: 4000016-010 (flat cable 1 piece)

2) Panel Indicators

PWR (Green): Module power supply is normal

OK (Green): TMR voting is normal, module is running normally

FAULT (Red): Module / Channel / Diagnostic Fault

CH01–CH08 (Yellow/Green): Channel status (normal / fault)

3) AI6700 vs AI2351 vs AI3721 (Key Differences)

AI6700: 8 differential, 16 bits, <1ms, multi-range, high precision, isolation, SIL3; Key high-precision safety circuits (such as precise pressure, flow, weighing)

AI2351: 8 channels, 24 bits, multiple signals (mA/V/TC/RTD), ultra-high precision; dedicated for temperature / thermocouple / thermoresistor

AI3721: 32 differential, 12/14 bits, 10ms, voltage dedicated, high density; large-scale high-speed voltage acquisition

II. Usage Instructions (Wiring + Configuration + Maintenance)

1) Wiring (with 9761-210 terminal board, differential isolation)

4–20mA two-wire transmitter

Transmitter + → CHx+

Transmitter‑ → CHx-

Shield → SHD (single-ended grounding)

±10V differential sensor

Signal + → CHx+

Signal‑ → CHx-

Shield → SHD

2) Configuration (TriStation Trident)

Hardware slot selection: AI6700

Channel Parameters:

Input Type → 4–20mA / ±10V etc.

Range → Corresponding range

Set filtering, alarm threshold, diagnostic enable

Download configuration, module restart takes effect

3) Fault Troubleshooting

FAULT (Red) on: Channel short circuit / open circuit / overrange → Check wiring, terminal board, sensor

OK (Off): Backplane power supply, firmware, TMR synchronization failure

Signal drift: Check shielding grounding, differential twisted pair, interference source, accuracy calibration