R. STAHL 9468/33-08-10 – 8-Channel HART Analog Universal I/O Module | IS1+ Remote I/O Platform
Engineering Background: The IS1+ Remote I/O system from R. STAHL is a field-proven, IEC Ex / ATEX-certified distributed I/O architecture purpose-built for hazardous area process automation. Deployed across oil & gas, chemical, and petrochemical facilities worldwide, the IS1+ platform enables intrinsically safe signal conditioning and HART pass-through at the field junction box level, eliminating the need for individual barriers in the control room.
Product Positioning: The STAHL 9468/33-08-10 is an 8-channel analog universal module within the IS1+ family. It accepts both 4–20 mA analog signals and HART digital communication simultaneously, making it the preferred choice for engineers integrating smart field instruments into DCS or SCADA systems operating in Zone 1 or Zone 2 hazardous environments.
Complete Technical Specifications
- Part Number / SKU: 9468/33-08-10
- Manufacturer: R. STAHL (Germany)
- Series / Platform: IS1+ Remote I/O
- Module Type: HART Analog Universal I/O
- Number of Channels: 8 (configurable per channel as AI or AO)
- Signal Range: 4–20 mA (active / passive selectable)
- HART Protocol: HART 5 / HART 7 pass-through, simultaneous multi-drop capable
- Communication Interface: PROFIBUS DP / PA (via IS1+ coupler)
- Accuracy: ±0.1% of full scale
- Isolation: Galvanic isolation channel-to-channel and channel-to-bus
- Supply Voltage: Via IS1+ backplane bus (24 V DC nominal)
- Power Consumption: ≤ 3.5 W (typical, fully loaded)
- Hazardous Area Certification: ATEX II 2G Ex ia IIC T4 / IECEx
- Safe Area / Field Side: Zone 1, Zone 2 (field); non-hazardous (control room)
- Operating Temperature: –20 °C to +60 °C
- Storage Temperature: –40 °C to +85 °C
- Degree of Protection: IP20 (module); IP65 (enclosure dependent)
- Mounting: IS1+ backplane rail, hot-swap capable
- Dimensions (W × H × D): Approx. 25 × 130 × 110 mm
- Weight: Approx. 200 g
- Country of Origin: Germany
Proven Application Environments
- Upstream oil & gas: wellhead and manifold instrumentation loops
- LNG terminals: cryogenic transmitter integration with HART diagnostics
- Petrochemical plants: reactor and distillation column process control
- Offshore platforms: Zone 1 classified deck and process areas
- Chemical manufacturing: batch process control with smart valve positioners
- Power generation: boiler and turbine instrumentation in hazardous zones
Engineering Advantages
- Universal Channel Configuration: Each of the 8 channels can be independently configured as analog input or analog output — reducing module SKU proliferation and simplifying spares management.
- Simultaneous HART Pass-Through: Full HART 5/7 communication is maintained alongside the 4–20 mA process signal, enabling remote diagnostics, calibration, and device management without loop interruption.
- Hot-Swap Replacement: Modules can be replaced under power without shutting down the IS1+ backplane, minimizing process downtime during maintenance windows.
- Galvanic Isolation: Channel-to-channel and channel-to-bus isolation prevents ground loops and protects the DCS from field-side faults.
- Compact Footprint: 25 mm slot width allows high channel density in constrained junction box enclosures.
- Integrated Diagnostics: Module-level and channel-level fault reporting via PROFIBUS DP status bytes, compatible with FDT/DTM asset management frameworks.
System Architecture & Signal Flow
The 9468/33-08-10 plugs into the IS1+ backplane rail alongside the power supply module and PROFIBUS coupler. Field instrument wiring connects to the module’s terminal block on the hazardous-area side. The 4–20 mA process value and HART digital signal are conditioned and galvanically isolated before being passed to the backplane bus. The IS1+ coupler aggregates all module data and presents it to the DCS via a single PROFIBUS DP segment, with HART frames multiplexed transparently for asset management tools such as Emerson AMS, ABB Asset Vision, or Yokogawa PRM.
Sourcing & Quality Verification
- All units sourced through authorized R. STAHL distribution channels or verified surplus with full traceability documentation.
- Each module undergoes incoming inspection: visual check, label verification (part number, revision, serial number), and functional loop test prior to shipment.
- Original R. STAHL certificates of conformity and ATEX declarations available upon request.
- Anti-counterfeit verification: holographic label and factory serial number cross-referenced against R. STAHL production records where applicable.
Procurement Process
- Confirm compatibility: Verify your IS1+ backplane revision and PROFIBUS coupler firmware version support the 9468/33-08-10 module revision.
- Request a quote: Contact [email protected] for volume pricing, lead time, and availability confirmation.
- Place order: Purchase directly via this listing or via PO — we accept T/T bank transfer, PayPal, and trade credit for qualified accounts.
- Shipping: DHL Express / FedEx International Priority from China. Export documentation (commercial invoice, packing list, COO) provided. Typical lead time: 3–7 business days.
- After-sales: 12-month warranty against manufacturing defects. Technical support available via email or WhatsApp.
Technical FAQ
Q: Can the 9468/33-08-10 be used with HART 7 devices?
A: Yes. The module supports both HART 5 and HART 7 protocol revisions transparently.
Q: Is hot-swap supported without process interruption?
A: Hot-swap is supported at the module level. The IS1+ backplane continues to operate; the affected channels will report a fault state to the DCS during the swap interval.
Q: What PROFIBUS coupler is required?
A: The module is compatible with R. STAHL IS1+ PROFIBUS DP couplers (e.g., 9468/11 series). Confirm coupler firmware ≥ V3.x for full HART multiplexing support.
Q: Can channels be mixed AI and AO in the same module?
A: Yes. Each channel is independently configurable via the PROFIBUS GSD file or FDT/DTM parameterization tool.
Q: What is the maximum number of HART devices per PROFIBUS segment?
A: Dependent on coupler model and firmware; typically up to 64 HART devices per IS1+ station.
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