Electrical Accessories - ABB
Electrical accessories complete control panels and machines. Push buttons, signal devices, connectors, thermal management and cable systems let operators control equipment and keep panels running reliably.
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Push buttons are the most direct way an operator talks to a machine. Start, stop, jog, reset and emergency stop functions all depend on a button that feels right, is clearly marked and holds up to thousands of presses in tough conditions.
Push Button Options
- Momentary and maintained buttons for start/stop and on/off functions
- Illuminated push buttons with LED indication of machine status
- Emergency stop mushroom heads with twist or key release
- Selector switches and key switches for mode selection and lockout
- Push button stations and enclosures for remote and pendant control
- Contact blocks, legend plates and guards to complete the assembly
Choosing the Right Button
Start with the mounting size (22 mm and 30 mm are the most common), then choose the operator type, color and contact arrangement. For outdoor, washdown or oily environments, check the NEMA or IP rating. Use red only for stop and emergency functions, and green or black for start, to follow common safety practice.
Centro carries push buttons and accessories from leading control brands, so you can match existing panels or build new ones with parts that work together.
Related categories: Electrical Accessories | Sounders | Drag Chain Guide Systems | Transformer Accessories | Control Lighting
Mechanical switches control circuits through physical actuation, such as limit switches, toggle switches, foot switches and safety switches. They're simple, reliable and used across machinery and controls.
Switch Types
- Limit switches – detect machine position
- Foot switches – hands-free operation
- Toggle and rocker switches – manual control
- Safety interlock switches – guard doors
- Micro switches – compact sensing
Choosing a Switch
Select actuator type, contact rating and environmental protection. Safety switches must meet relevant standards.
Centro supplies mechanical switches for machines and panels.
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Electrical transformer accessories make transformer installations safer, neater and easier to service. Mounting brackets, weather shields, terminal kits and fuse blocks adapt transformers to your panel or site conditions.
Accessories Available
- Wall and floor mounting brackets – secure installation
- Weather shields and drip hoods – outdoor protection
- Lug and terminal kits – correct conductor termination
- Fuse blocks and fuses – overcurrent protection
- Vibration isolation pads – reduce transformer hum and noise
Choosing Accessories
Check compatibility with the transformer's frame size and manufacturer. Outdoor installations need NEMA 3R weather shields, and noise-sensitive spaces benefit from isolation pads. Follow NEC requirements for primary and secondary protection.
Centro can match transformer accessories to your transformer model and installation needs.
Related categories: Electrical Accessories | Control Lighting | Drag Chain Guide Systems | Thermal Management | Sounders
Industrial networking connects PLCs, drives, HMIs and sensors so data moves reliably across the plant. Robust networks support automation, monitoring and remote access.
Networking Products
- Unmanaged and managed Ethernet switches – connect devices
- Industrial routers and firewalls – secure remote access
- Protocol gateways – connect different networks
- Wireless access points – mobile and hard-to-wire equipment
- Industrial Ethernet cables and connectors – reliable links
Planning a Network
Consider the number of devices, protocols, segmentation and cybersecurity. Managed switches add diagnostics and traffic control. Use industrial-rated hardware for temperature and vibration.
Centro supplies industrial networking products.
Related categories: Electrical Accessories | Drag Chains | Connectors | Cable Entry | Thermal Management
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- Industrial control panels rely on a range of electrical accessories to organize wiring, provide operator input, and indicate system status. Common categories include push buttons and selector switches for operator control, pilot lights and indicator lights for visual status feedback, terminal blocks for organizing and connecting field wiring, wire duct (also called wiring trunking) for routing and managing cables within the enclosure, DIN rail for mounting components, and cable glands and cord grips for securing cables entering the enclosure. These accessories may seem secondary to the main control devices, but they are essential for building a panel that is safe, organized, and maintainable.
- The 22mm and 30mm designations refer to the panel cutout diameter — the size of the hole required to mount the device. 22mm is the current IEC standard and is the most widely used size in new industrial panel designs worldwide. 30mm is the traditional NEMA standard, still common in North American heavy-industrial and legacy panels. Functionally, both sizes offer the same types of operators — flush, extended, mushroom head, illuminated, and emergency stop — but 22mm devices are more compact, allowing more operators in a smaller panel footprint. When designing a new panel, 22mm is the standard choice unless the application requires the larger 30mm format for gloved-hand operation or compatibility with an existing panel cutout.
- Terminal blocks are modular, insulated connectors mounted on DIN rail inside a control panel that provide a secure, organized connection point between field wiring and internal panel wiring. Instead of splicing wires together or landing every field wire directly on a device terminal, terminal blocks create a clean interface — field wires land on one side, and internal panel wires connect on the other. This makes troubleshooting, testing, and future modifications far easier because individual circuits can be disconnected and tested at the terminal block without disturbing the device wiring. Terminal blocks are available in screw-clamp, spring-clamp, and push-in styles, and in configurations for signal wiring, power distribution, grounding, fused circuits, and sensor connections.
- Wire duct (also called wiring trunking or cable raceway) is a slotted plastic channel mounted inside a control panel to route and organize wiring between components. The slots along the sides allow wires to exit the duct at any point along its length, providing clean access to terminal blocks, contactors, circuit breakers, and other devices. To select the correct size, the general rule is that wires should fill no more than 40–50% of the duct's cross-sectional area — this allows room for adding wires in the future and prevents excessive heat buildup. Duct is available in various widths and depths, and in standard slotted, narrow-slot, and solid-wall versions depending on the wire gauge and density of the application.
- An emergency stop push button is a safety device that immediately de-energizes a machine or process when pressed by an operator. E-stops are typically large, red, mushroom-head buttons on a yellow background for high visibility, and they use a latching mechanism — once pressed, they stay locked in the off position until manually released by twisting, pulling, or using a key. This prevents accidental restart. OSHA and machine safety standards (such as NEMA ICS 6 and ISO 13850) require emergency stop devices on machinery where a hazard to personnel exists. E-stops must be wired into the safety circuit so that pressing the button removes power from all hazardous motion. They should be mounted in a location that is immediately accessible to the operator, and every machine should have at least one.