ABB MB810 – 8/10‑Channel Remote I/O Module for Modbus Control

The MB810 is a compact remote I/O module designed for PLC/SCADA expansion where you need a simple way to bring in discrete signals and drive outputs over Modbus. From my experience, it fits well in space-constrained control panels and typically handles 24 VDC digital inputs alongside transistor or relay outputs. You might notice that setup is straightforward: wire your field signals, connect RS‑485, set the Modbus address, and it’s live in minutes.

Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week for in‑stock items; no more than 1 month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• 8 digital inputs + 10 digital outputs – A practical split for machine start/stop signals, sensors, and small actuator control.
• Modbus RTU over RS‑485 – Plays nicely with most PLCs, HMIs, and SCADA systems; addressing and baudrate setup is quick.
• 24 VDC power – Fits standard industrial power rails; power budgeting is simple in mixed OEM cabinets.
• DIN‑rail mounting – Saves panel space and keeps wiring tidy; you can clip it next to your PLC or power supply.
• Status LEDs – At a glance diagnostics for power, comms, and I/O states helps during commissioning.
• Industrial temperature range – Typically suitable for factory floors and equipment enclosures where heat fluctuates.
• Isolation and protection – In many cases includes isolation between comms/power/I/O and basic reverse polarity protection.

Technical Specifications

Application Fields

I usually see MB810 units added where a PLC needs a handful of extra points without changing the main rack:

• Packaging machines – infeed photoeyes, cylinder solenoids, and jam sensors
• HVAC & building automation – fan run feedback, damper control, alarm beacons
• Water & wastewater – level switches, pump start signals, local annunciation
• Material handling – conveyor start/stop, diverter gates, safety interlocks (non‑SIL)
• General OEM machinery – quick I/O expansion for custom panels

Advantages & Value

• Compatibility – Modbus RTU means it ties into most PLC brands with minimal coding.
• Cabinet efficiency – Narrow DIN‑rail footprint helps when every millimeter matters.
• Cost control – For small I/O increments, it’s often cheaper than adding a full PLC expansion rack.
• Scalability – You can chain multiple RS‑485 nodes; addressing remains easy to manage.
• Supportability – Clear LED diagnostics and simple parameterization shorten commissioning time.

Installation & Maintenance

• Panel environment: Install in a clean, dry cabinet (IP54 or better recommended) with ventilation to keep below 60 °C.
• Power & grounding: Use a stabilized 24 VDC supply; tie FG/PE to cabinet ground; avoid shared noisy loads.
• RS‑485 wiring: Shielded twisted pair (120 Ω); daisy‑chain topology; termination and biasing at bus ends only.
• I/O wiring: Separate high‑current inductive loads from signal wiring; add flyback diodes for DC coils if DO is transistor type.
• Safety: De‑energize before wiring; verify IO type (relay vs transistor) matches your load.
• Routine checks: Quarterly tighten terminals, inspect for dust, confirm comms stability; update firmware where applicable.

Compatible Accessories & Supporting Components

• 24 VDC DIN‑rail power supply (60–120 W depending on load)
• Shielded RS‑485 cable (120 Ω impedance) and end‑of‑line terminators
• DIN‑rail end clamps and grounding terminals
• Surge suppressors or RC snubbers for inductive loads
• Panel-mount brackets if DIN‑rail space is limited

Quality & Certifications

Units are produced to industrial standards and, in most cases, comply with CE and RoHS requirements. UL/cUL availability can be model‑dependent. Typical factory QA includes functional testing and serial‑level traceability. Warranty is 365 days from shipment.