GE HE693STG884 8‑Channel Strain Gauge / Load‑Cell Analog Input Module

Description

Basic Hardware Information

• Input channels: 8 independent strain‑gauge input channels
• Signal input range: Software configurable per‑channel: ±25 mV, ±50 mV, ±100 mV
• ADC resolution: 16‑bit sigma‑delta conversion; resolution reaches 0.8 µV / 1.6 µV / 3.2 µV corresponding to different ranges
• Conversion speed: 35 channels per second total sampling rate
• Input impedance: >1000 MΩ; maximum safe input voltage ±35 V DC/AC transient protection
• Excitation function: On‑board excitation voltage supply, supports excitation voltage monitoring and automatic compensation for excitation drift
• Backplane power consumption: Inrush 160 mA @5 VDC; steady‑state 30 mA @5 VDC
• Mechanical structure: Single‑slot rack‑mount module; non‑hot‑swappable
• Status indicators: Front‑panel LED indicators for module health and channel diagnostic status
• Operating ambient temperature: 0 ℃ ~ +60 ℃; storage temperature ‑40 ℃ ~ +85 ℃; relative humidity 5‑95 % non‑condensing
• Software configuration: Parameter setup completed via LogicMaster 90 software; individual unused channels can be disabled to reduce module response latency.

Core Functions & Features

1. Direct interface for bridge‑type load‑cells and strain‑gauges, eliminates requirement for external signal transmitter hardware.
2. Per‑channel independent range configuration; unused channels can be turned off to optimize sampling speed.
3. Excitation voltage monitoring and compensation function reduces measurement deviation caused by excitation source fluctuation.
4. Built‑in diagnostic functions: wire‑break detection, over‑range and under‑range alarm for each channel; fault status is mapped to PLC discrete input memory area.
5. Supports software zero‑point offset and span calibration for field sensor correction; measured millivolt values are transferred to Series 90‑30 CPU via backplane bus.

On‑site Installation & Commissioning Notes

1. Power off the entire PLC rack before inserting or removing HE693STG884; this module is non‑hot‑swappable. Take ESD protection measures during handling.
2. Use shielded twisted‑pair cables for strain‑gauge field wiring. Separate sensor cables from high‑power cables to suppress electromagnetic noise. Keep cable length consistent for multi‑channel load‑cell groups.
3. Complete hardware configuration in LogicMaster 90 software: define input range, enable‑disable channels, set digital filter parameters and alarm thresholds.
4. Perform zero‑point calibration under no‑load condition, then execute span calibration using standard reference weight or force.
5. After commissioning, apply known test load to verify reading accuracy and diagnostic response.
6. Replacement note: General analog input modules cannot serve as direct substitutes; replacement must use identical part number.