Description
Product Overview
The ABB MT-91-ARC FP A is an industrial operator panel designed to provide a local visual interface for compatible automation equipment. Its 12.1-inch TFT color display and 800 × 600 SVGA resolution allow operators to view configured screens, equipment status, operating parameters, and diagnostic information. The resistive touchscreen supports direct interaction with the displayed application. Catalog records associate the panel with ABB’s Procontic CS31 product family, making identification of the installed controller and original application important when planning a replacement.
The panel’s listed interfaces include two serial ports, two USB ports, and one Ethernet connection. These interfaces may support different functions depending on the exact hardware and software configuration; their presence alone does not establish which protocols or connection modes are enabled in a particular installation. Before connecting the panel to a controller, maintenance personnel should compare the original wiring diagram, connector pinout, communication settings, and application requirements. The available catalog descriptions identify the product as an operator panel, but do not provide enough verified documentation to establish every supported protocol or a universal compatibility list.
For procurement and field replacement, the main risk is assuming that a similar-looking panel will operate correctly without configuration work. Verify the complete model designation, hardware and software identification labels, power input marking, physical mounting dimensions, and the availability of the original application files. Published listings differ on some electrical and mechanical details, so use the actual unit nameplate and applicable technical documentation rather than relying on generic reseller specifications. If the panel is refurbished or used, request evidence of display, touchscreen, port, and startup testing. A unit that powers on may still be unsuitable if its application or communication configuration cannot be restored.
Product Introduction
The ABB MT-91-ARC FP A is an MT91 operator panel associated with the Procontic CS31 family. Its color touchscreen and multiple communication interfaces support local operation and monitoring of compatible industrial equipment.
When replacing an installed unit, verify the original application, port configuration, and nameplate power ratings. Confirm these details before purchase to reduce the risk of commissioning delays.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB / ABB Procontic |
| Model | MT-91-ARC FP A |
| Product Family | Procontic CS31 |
| Product Type | Industrial operator panel / HMI |
| Display | TFT color LCD |
| Screen Size | 12.1 inches |
| Resolution | 800 × 600 pixels |
| Display Colors | Up to 262,000, according to catalog listings |
| Touchscreen | Resistive |
| Serial Interfaces | 2, as listed by suppliers |
| USB Interfaces | 2, as listed by suppliers |
| Ethernet | 1 interface, as listed by suppliers |
| Communication Protocols | Verify against the original system configuration |
| Power Supply | Listings specify 100–240 V AC; confirm the unit’s nameplate |
| Other Electrical Markings | Some physical-unit listings show 24 V and 60 V / 0.5 A markings; their functions must be verified |
| Front Protection | IP65 reported by secondary listings; confirm the specific unit |
| Rear Protection | IP20 reported by secondary listings |
| Mounting | Panel mounting |
| Dimensions | Supplier listings vary; measure the original unit and cutout |
| Weight | Approximately 2.2–2.63 kg in some listings |
| Application | Local operator interface, monitoring, and equipment control |
The available sources are predominantly catalog and supplier listings rather than a verified, revision-specific ABB datasheet. Specifications marked for confirmation should not be treated as guaranteed electrical or mechanical limits.

MT-91-ARC FP A
Related Products
- ABB Procontic CS31 — Automation product family associated with the MT91 operator panel.
- ABB MT-91-RS-232F — Related MT91 panel variant identified in industrial product catalogs.
- ABB CS31 controller hardware — Relevant when confirming the controller connection and application compatibility.
- Serial communication cables — Must match the installed interface type and pinout.
- USB accessories — Relevant only where the original application and hardware configuration use the panel’s USB ports.
- Ethernet cabling and network accessories — Used where Ethernet communication is configured for the installation.
These products are related by platform or interface type; none should be assumed to be a direct replacement without checking the original system documentation.
Frequently Asked Questions
Q1: What is the ABB MT-91-ARC FP A?
It is an MT91 industrial operator panel associated with the Procontic CS31 product family. It provides a local display and touch interface for compatible equipment.
Q2: What is the display specification?
Supplier documentation lists a 12.1-inch TFT color LCD with an 800 × 600 pixel resolution and resistive touchscreen operation.
Q3: Which communication protocols does it support?
Listings identify serial and Ethernet interfaces, but the available evidence does not establish a complete protocol list for every hardware revision. Verify the original controller connection and software documentation before configuring a replacement.
Q4: What power supply does the panel require?
Some listings specify 100–240 V AC, while a listing based on a physical unit shows other voltage markings. Do not connect power based on the model number alone. Confirm the actual nameplate and terminal markings first.
Q5: Can a modern HMI replace the MT-91-ARC FP A?
Potentially, but compatibility is not automatic. The replacement may require a new visualization project, communication-driver changes, wiring modifications, or a different mounting cutout.
Q6: What should be inspected before accepting a replacement?
Check the nameplate, display, touch response, connectors, mounting points, and power input. Where possible, verify startup and communication with the intended controller. For refurbished units, ask for the actual functional-test results.
Q7: Is the MT-91-ARC FP A still supported by ABB?
Its current official lifecycle and service status could not be confirmed from the available sources. Check with ABB or a qualified service provider for current support and replacement guidance before planning a long-term maintenance strategy.
