Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Horner Automation / GE Fanuc-compatible |
| Model | HE693ADC409A-22 |
| Product Family | HE693 Series / Series 90-30 |
| Product Type | Millivolt Analog Input |
| Number of Channels | 4 |
| Input Signal | DC millivolt |
| Commonly Listed Ranges | ±25 mV, ±50 mV, ±100 mV |
-22 Revision Documentation |
±250 mV, ±500 mV, ±1000 mV |
| Resolution | 3 / 6 / 9 µV for ±25/50/100 mV ranges |
| Accuracy | ±0.05% |
| Input Impedance | >20 MΩ |
| Maximum Safe Overload | ±35 VDC |
| Common-Mode Range | ±12 VDC |
| A/D Conversion | Integrating |
| Update Rate | 35 channels/sec |
| Strain Gauge | Bridged load cell |
| PLC Memory Requirement | 4 %AI points |
| Power | 100 mA @ 5 VDC |
| Wiring | Removable 20-pin terminal strip |
| Operating Temperature | 0 to 60°C |
| Relative Humidity | 5–95%, non-condensing |
The 4-channel, 14-bit millivolt-input architecture and the ±25/50/100 mV specifications are documented for the HE693ADC409 family by Horner and independent technical listings.
Product Overview
The GE Fanuc HE693ADC409A-22 is a specialized millivolt-level analog input module designed for low-level sensor signals in GE Fanuc Series 90-30 PLC applications. Unlike a conventional 0–10 V or 4–20 mA analog input card, the module is intended to accept very small DC signals directly, allowing applications such as load-cell and strain-gauge measurement without an external signal transmitter. Horner’s documentation states that the module processes the analog signal internally and writes the resulting millivolt value into the PLC %AI input table.
The HE693ADC409A-22 provides four analog channels and uses integrating A/D conversion. The standard HE693ADC409 family documentation specifies selectable ±25 mV, ±50 mV and ±100 mV ranges, with corresponding resolutions of 3 µV, 6 µV and 9 µV and accuracy of ±0.05%.
HE693ADC409A-22
The module is particularly relevant to older GE Fanuc Series 90-30 installations where load cells, strain gauges or other weak analog sources are connected directly to the PLC. Horner’s legacy documentation still lists HE693ADC409 under its millivolt input module documentation, confirming its place in the legacy HE693 product family.
Main Features & Field Considerations
Direct millivolt measurement
The module is designed specifically for weak DC signals. This eliminates the need for an external signal-conditioning stage in applications where the sensor output falls within the supported range.
Four independent channels
Four channels allow multiple load cells or millivolt-level sensors to be connected to one module. The module occupies four %AI points in the PLC I/O table.
High input impedance
The specified input impedance is greater than 20 MΩ, minimizing loading of low-level sensor circuits. This is useful when working with bridge-type load cells and strain-gauge instrumentation.
Integrating A/D conversion
The integrating converter is appropriate for low-level industrial measurements where electrical noise rejection is important. A selectable digital filtering function is also documented for the module.
Load-cell compatibility
Horner explicitly identifies bridged strain gauges/load cells as supported sensor types. This makes the module more specialized than a standard Series 90-30 voltage-input card.
Replacement Considerations
The most important issue with HE693ADC409A-22 is the input-range discrepancy between published documents.
The Horner document specifically titled for HE693ADC409-22 states:
- ±250 mV
- ±500 mV
- ±1000 mV
with corresponding resolutions of 30 µV, 60 µV and 90 µV.
Other technical documentation for HE693ADC409/409A lists:
- ±25 mV
- ±50 mV
- ±100 mV
with 3 µV, 6 µV and 9 µV resolution.
Because your part number includes the A-22 suffix, I would not substitute a standard HE693ADC409 solely on the basis of the family number. Confirm the exact label, revision, configuration software behavior, and installed sensor range before replacement.
Procurement Description
GE Fanuc / Horner HE693ADC409A-22 — 4-Channel Millivolt Analog Input Module for Series 90-30 PLC, Direct Low-Level DC Signal Acquisition, Load Cell / Strain Gauge Support
For procurement, specify the complete HE693ADC409A-22 designation and provide a photograph of the module label if possible. The -22 revision matters because the published input-range specifications differ from the standard family documentation.
