I. Core Parameters (9771-210)

1) Basic Specifications

Model: 9771-210 (AI ETP, 16 Points, Configurable V/I, Passive)

Signal Type: Software Configurable - 4–20mA Current or 0–5V/0–10V Voltage (TriStation Configuration Switch)

Channel Count: 16 Points / Board (Half-Length Size, Flexible Group Wiring)

Sampling Resistance: Built-in 250Ω Precision Resistor (4–20mA → 1–5VDC, No External Connection Required)

Input Impedance: Current Mode 250Ω; Voltage Mode High Resistance (≥1MΩ)

Isolation: ≥1500VAC Field - System Isolation, Channel-to-Channel Isolation

Accuracy: ±0.05% FS @ 25℃

Diagnosis: Open Circuit / Short Circuit / Overrange (Current < 4mA or > 20mA, Voltage Overrange)

Safety Level: SIL3 (IEC 61508)

Power Supply: Passive Terminal Board (No 24V Required)

Operating Temperature: -40℃ ~ +70℃

Certifications: CE, UL, CSA, ATEX/IECEx

Installation: 35mm DIN Rail

Compatible Modules: 3700, 3700A, 3703E, 3721 (Tricon 16/32 Point AI)

Cables: Special Flat Cables (Same as 9760/9761 Series)

2) Panel Indicator Lights

CH01–CH16 (Green): Channel Normal (Signal within Valid Range)

FAULT (Red): Any Channel Fault (Open Circuit / Short Circuit / Overrange)

3) Key Differences between 9771-210 and 9760-210/9761-210/9765-210

9771-210: 16 Points, Voltage / Current Configurable, Passive; General Type, Suitable for Mixed Signals (Voltage + Current)

9760-210: 32 Points, Pure Two-Wire 4–20mA, Passive; Standard High Density

9761-210: 16 Points, Pure Two-Wire 4–20mA, Passive; Half-Length Compact

9765-210: 32 Points, Three-Wire 4–20mA, With CJC; Three-Wire + Thermocouple Specialized

II. Usage Instructions (Installation / Wiring / Configuration)

1) Configuration Rules

32 Point AI Module (3700A/3720): 2 Pieces of 9771-210 Connected in Parallel (1–16 Channels, 17–32 Channels)

16 Point AI Module (3703E): 1 Piece of 9771-210 Directly Connected

Hot Swap: Supports Online Replacement, Does Not Affect System Operation

2) Wiring (Voltage / Current Common)

4–20mA Two-Wire Transmitter (Default):

Transmitter + → CHx+

Transmitter - → CHx-

Built-in 250Ω, No External Resistor Required

0–5V/0–10V Voltage Signal (Configuration Switch):

Signal + → CHx+

Signal - → CHx-

Cable: 1.0–1.5mm² Shielded Twisted Pair, Single-Ended Grounding of Shield Layer

3) Configuration Steps (TriStation)

Hardware Configuration Selects Corresponding AI Module (3700/3703E/3721)

Channel Parameter Settings: Input Type → Current (4–20mA) or Voltage (0–5V/0–10V)

Download Configuration, Module Reboot to Take Effect

4) Fault Troubleshooting FAULT Red and bright: Open circuit / Short circuit / Over-range of the channel → Check wiring, power supply of the transmitter, and matching of configuration type

CH Light does not illuminate: Check flat cable, module configuration, and terminal tightening

Unstable signal: Check shielding grounding, cable length, and environmental interference