GE HE693THM884 Series 90-30 Thermocouple Input Module
Manufacturer: GE Fanuc
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Part Number: HE693THM884
Condition：New with Original Package
Product Type: Thermocouple Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
GE Fanuc HE693THM884 Series 90-30 Thermocouple Input Module
The GE Fanuc HE693THM884, also cataloged as the HE693THM884 Thermocouple Input Module, operates as a dedicated hardware component for high-resolution temperature signal acquisition within Series 90-30 PLC rack architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | HE693THM884 |
| Brand | GE Fanuc |
| Origin | United States |
| Weight | 0.5 kg (0.75 lbs) |
| Dimensions | 3.6 x 13 x 13.5 cm |
| Operating Temp | 0 to 60 deg C |
| Storage Temp | -40 to 85 deg C |
| Humidity | 5 to 95% non-condensing |
| Protection Class | IP20 |
| Power Consumption | 100 mA @ 5 VDC |
| Rack Compatibility | Series 90-30 PLC |
| Channel Count | 8 channels |
| Supported Thermocouples | Type J (-210 to +760 deg C), Type K (-270 to +1372 deg C) |
| Measurement Resolution | 0.1 deg C |
| A/D Conversion | 18-bit integrating A/D converter |
| Scan Rate | 40 channels per second |
| Input Impedance | Greater than 20 M-ohm |
| Common Mode Rejection | Greater than 100 dB |
I/O Density Scaling & Backplane Bus Integrity
Engineers configure the module directly onto the local backplane bus to optimize data transfer rates and eliminate communication bottlenecks. The module utilizes an 18-bit integrating A/D converter to scale high-density sensor signals while suppressing electrical noise through channel-level filtering. Onboard firmware automatically updates internal register tables, allowing the main Series 90-30 CPU to parse real-time thermal values without incurring scanning overhead on the backplane bus.
Frequently Asked Questions
Q: How does the module react to a broken thermocouple sensor wire?
A: An active open-circuit detection circuit immediately identifies a broken wire and forces the corresponding internal register to its maximum positive value, alerting the PLC CPU of the open-loop fault.
Q: Can the module draw power directly from external sensor loops?
A: No, the module receives its operational power directly from the 5 VDC rail on the Series 90-30 backplane bus, consuming a nominal 100 mA during standard execution.
Field Installation Guidelines
Install the module strictly inside an enclosure that provides an IP20 or higher protective shell. Before seating the unit into the backplane, turn off all power sources to the rack to avoid damaging the edge connectors. Secure the module grounding point directly to the central DIN-rail or panel backplate using low-impedance ground straps. Run thermocouple extension leads in separate wire trunks isolated from high-voltage AC motor drives and heavy inductive loads to prevent electromagnetic interference.