ABB 500BIO01 1MRB150005R1/K – High-Density Digital I/O Module for Industrial Automation

If you’re upgrading or maintaining an ABB AC 500 series control system, the 500BIO01 (model 1MRB150005R1/K) is one of those workhorse modules that typically shows up in mid- to high-complexity PLC setups. It’s a digital input/output module—specifically 16 inputs and 16 outputs—designed to interface with field devices like sensors, pushbuttons, relays, and small actuators. From my experience, it’s commonly used in water treatment plants, packaging lines, and HVAC control panels where reliable signal handling matters more than raw speed.

Key Features

• Dual functionality: Combines 16 digital inputs (24 VDC) and 16 relay-based outputs in one compact unit—helps save cabinet space compared to using separate modules.
• Relay outputs with dry contacts: Each output can switch up to 2 A at 250 VAC, making them suitable for driving small contactors or interfacing with legacy systems without voltage compatibility issues.
• Modular expandability: Plugs directly into the AC 500 CPU rack or extension base units, allowing flexible system scaling. One thing I appreciate is how cleanly it integrates with other 500-series I/O modules.
• LED status indicators: Per-channel LEDs on both input and output sides make troubleshooting faster—no need for software just to verify basic signal flow.
• Wide operating temperature range: Rated from -25°C to +60°C, so it holds up well in unheated substations or outdoor enclosures in most climates.

Technical Specifications

Application Fields

This module seems to be particularly popular in applications where mixed signal types are needed but space is limited. You might notice it in wastewater lift stations controlling pumps and level sensors, or in machine-building OEM panels where discrete control dominates. It also appears in retrofits—say, replacing older Siemens S7-300 setups where users want to keep similar I/O density but move to ABB’s platform. The relay outputs help avoid extra interface relays when switching higher loads, which simplifies wiring in many cases.

Advantages & Value

Procurement teams tend to like this module because it reduces BOM complexity—one part number instead of two separate DI and DO modules. That usually means lower inventory cost and fewer SKUs to manage. From a lifecycle standpoint, ABB’s long-term availability policy helps, especially if you’re supporting equipment over 10+ years. And since it uses standard field voltages and mechanical relays, compatibility with third-party devices rarely becomes an issue—even in mixed-vendor environments.

Installation & Maintenance

Install in a clean, well-ventilated control cabinet meeting IP54 or better standards. Make sure DIN rail is securely mounted and the module clicks fully into place—partial connection can cause intermittent faults. Use shielded twisted-pair cables for inputs in electrically noisy areas, and ground shields at one end only. For maintenance, inspect terminal screws annually for tightness, especially in environments with vibration. While there’s no firmware update required for the module itself, ensure your CPU firmware remains compatible after any system upgrades. Cleaning is straightforward—just use compressed air and a lint-free cloth; avoid solvents.

Quality & Certifications

The 500BIO01 is CE, UL, and RoHS compliant, and designed under ISO 9001 quality processes. ABB typically backs these modules with a global three-year warranty, though our supply agreement extends support to 365 days from shipment, including technical assistance for integration. Units are tested before dispatch, and we only source from authorized channels to prevent counterfeit risks.

Our Order Placement Process & Guarantees

• Warranty: 365 days from date of delivery
• Delivery time: 1 week for in-stock units; maximum 4 weeks if requiring shipment coordination
• Payment: 50% advance payment, balance due before shipment
• Shipping: FedEx, UPS, or DHL express—tracking provided upon dispatch