Product Details
Configured for multi-channel current signal translation within RSTi PacSystem architectures, the GE ST-3218 (ST-3218 Analog Input Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST-3218 |
| Brand | GE Fanuc Emerson |
| Origin | United States |
| Weight | 0.91 kg (2.00 lbs) |
| Dimensions | 70 mm x 12 mm x 90 mm |
| Operating Temp | 0 - 60 deg C |
| Power Consumption | Max 60 mA @ 5 VDC (internal logic) |
| Inputs | 8 Analog Inputs |
| Resolution | 12 bits |
| Input Current Range | 4 to 20 mA |
| Input Impedance | 120 Ohms |
| Input Points per Common | 8 |
| Update Rate | 4 ms for all channels |
| Mounting | Rack or Panel |
Firmware Flash Compatibility and Internal Bus Processing
The module converts 8 independent 4-20 mA current loops using a localized 12-bit analog-to-digital converter array running a fixed 4 ms update loop across all channels. Internal logic relies on an instrumentation path with a precise 120 Ohms input impedance to manage loops while preserving signal linearity. Synchronous transmission across the local interface stack requires matching firmware flash compatibility structures to execute real-time register updates over Profinet / EtherNet/IP deterministic networks without introducing transport frame drops.
Frequently Asked Questions
Q: Does the ST-3218 module accommodate live insertion or extraction during system operation?
A: No. The parallel backplane design of the RSTi PacSystem slice interface does not feature staggered power pins or physical isolation gates. Performing a hot-swap operation while the terminal assembly is energized can cause unexpected logic faults or hardware component damage.
Q: How is the reference structure configured for the 8 loop circuits?
A: The hardware routes all 8 analog input loops through a single common point. All 4-20 mA field transmitters wired to this block must share the identical electrical ground potential to prevent parasitic ground loop measurement offset errors.
Field Installation Guidelines
- Base Rails Engagement: Mount the module into the designated base unit slots, keeping precise alignment along the terminal channel guides until the latching mechanism clicks into position.
- Current Loop Separation: Route all 4-20 mA field signal conductors through separate low-voltage wireways isolated from alternating current (AC) power lines and motor drive paths.
- Shielding Ground Plane: Connect instrument cable shields to a dedicated ground busbar directly at the point of enclosure entry, maintaining structural isolation from active neutral rails.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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