Process Control & Industrial Automation Solution – ABB TU838 Extended MTU | AC800M Series
Where This Product Is Used
The ABB TU838 Extended MTU (Marshalling Terminal Unit) is engineered for demanding industrial environments where reliable signal marshalling between field instruments and DCS controllers is critical. Typical deployment scenarios include:
- Oil & Gas Processing Plants – Connecting pressure transmitters, flow meters, and control valves to ABB AC800M controllers in upstream/downstream facilities.
- Chemical & Petrochemical Plants – Providing a structured, labeled wiring interface for hazardous-area field signals routed through barriers.
- Power Generation & Utilities – Integrating analog and digital I/O from turbine control, boiler management, and substation automation systems.
- Pulp & Paper / Water Treatment – Simplifying cabinet wiring for multi-loop process control with ABB S800 I/O modules.
- Pharmaceutical & Food Manufacturing – Supporting GMP-compliant, traceable wiring layouts in validated control systems.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | TU838 |
| Product Family | S800 I/O – Extended MTU |
| Compatible Controllers | ABB AC800M (PM851, PM856, PM860, PM861, PM864, PM866) |
| Compatible I/O Modules | ABB S800 I/O Series (AI810, AO810, DI810, DO810, etc.) |
| Terminal Type | Extended Marshalling Terminal Unit (MTU) |
| Mounting | DIN Rail |
| Weight | Approx. 1,000 g |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Ingress Protection | IP20 (panel-mounted) |
| Compliance | CE, cULus, IEC 61131-2 |
Why Engineers Specify This Model
- Extended Wiring Capacity – The TU838 provides additional terminal rows compared to standard MTUs, reducing the need for external terminal blocks and simplifying cabinet layouts.
- Plug-and-Play with S800 I/O – Direct mechanical and electrical compatibility with ABB S800 I/O modules eliminates custom wiring adapters.
- Labeled, Structured Terminations – Pre-defined terminal assignments accelerate commissioning and reduce wiring errors during FAT/SAT.
- Hot-Swap Ready – Supports module replacement without full system shutdown, minimizing process interruption.
- Long Product Lifecycle – Part of ABB’s committed S800 I/O platform with long-term spare parts availability.
Complete System Bill of Materials
For a complete AC800M + S800 I/O control loop, engineers typically specify:
- ABB AC800M Controller (e.g., PM864A or PM866K01)
- ABB S800 I/O Modules (AI810, AO810V, DI810, DO810)
- ABB TU838 Extended MTU (this item)
- ABB TB820V ModuleBus Optical Port (for remote I/O)
- ABB CI854A / CI858 Communication Interface (PROFIBUS / FOUNDATION Fieldbus)
- 24 VDC Power Supply (e.g., ABB SD831 or equivalent)
- DIN Rail Cabinet with EMC shielding
Compliance & Industry Standards
- IEC 61131-2: Programmable Controllers – Equipment Requirements and Tests
- CE Marking (EU Low Voltage Directive & EMC Directive)
- cULus Listed (UL 508 Industrial Control Equipment)
- RoHS Compliant
- Compatible with IEC 61511 (Functional Safety – SIS applications, when used with certified I/O)
Quality Assurance & Sourcing
All ABB modules supplied by Konmask.com are:
- Sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Inspected for physical integrity, label authenticity, and firmware/hardware revision consistency prior to dispatch.
- Shipped in anti-static packaging with original or equivalent protective materials.
- Backed by our 30-day return policy and technical support from our automation engineering team.
How to Source This Part
To place an order or request a quote for the ABB TU838:
- Online: Add to cart directly on this page. We accept T/T, PayPal, and major credit cards.
- Email RFQ: Send your BOM or part list to support@konmask.com for volume pricing.
- Phone / WhatsApp: +0086 19859288691 (Mon–Sat, 09:00–18:00 CST)
- Lead Time: In-stock items ship within 1–3 business days. Ex-stock or sourced items: 5–15 business days.
Application-Specific FAQ
Q: Is the TU838 compatible with all S800 I/O modules?
A: The TU838 is designed for use with the ABB S800 I/O series. Always verify the specific I/O module datasheet for MTU compatibility before ordering.
Q: Can the TU838 be used in SIL-rated safety loops?
A: The TU838 itself is a passive terminal unit. SIL rating depends on the complete loop including the I/O module and controller. Consult ABB’s functional safety documentation for your specific configuration.
Q: What is the difference between TU838 and TU830/TU831?
A: The TU838 is an extended MTU offering more terminal positions per module slot, reducing external terminal block requirements. TU830/TU831 are standard MTUs with fewer terminals.
Q: Do you provide the ABB datasheet or wiring diagram?
A: Yes. Contact us at support@konmask.com and we will provide the official ABB TU838 datasheet and relevant wiring documentation.
Q: Can I return the module if it is incompatible with my system?
A: Yes, we offer a 30-day return window for unused, uninstalled items in original condition. Please contact our support team before returning.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
