We use cookies to make your experience better. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Learn more.
ABB Sentry Safety Relays at LED Controls
What is an ABB Sentry Safety Relay?
The ABB Sentry Safety Relay range is designed to stop machines quickly and reliably when something unsafe happens, such as an emergency stop being pressed or a safety gate being opened. They are commonly found in factories, workshops and automated production lines.
A safety relay works by monitoring signals from safety devices like emergency stop buttons, light curtains or safety switches. If the relay detects a fault or unsafe condition, it cuts power to the machine to prevent injury or damage. Some models also allow timed delays, which can be useful when machinery needs to slow down safely before stopping. They are compact, easy to install on a DIN rail and simple to wire, making them a good option even if you are not a safety specialist.
As an ABB Value Provider, LED Controls is a proud distributor of these essential, trustworthy bits of kit.
ABB Sentry Safety Relay Range
Sentry BSR relays are used for simple safety functions such as monitoring an emergency stop button or expanding the number of safe outputs in a control panel. These relays are ideal where the safety logic does not need timers or advanced features.
Sentry SSR relays are single-function safety relays designed to perform a specific safety task, such as monitoring emergency stops, safety gates, two-hand control devices or light curtains. These are the most commonly used Sentry relays in everyday machine safety systems.
Sentry TSR relays are safety relays with integrated timing functions. They are used when a delay is required before a safety output changes state. This can be useful if a machine needs time to slow down safely before power is removed, or if a controlled restart delay is required. TSR relays combine safety monitoring and timing in one compact unit.
Sentry USR relays are universal safety relays. They are designed to work with many different types of safety devices and applications, making them very flexible. A USR relay can often replace several different single-function relays. These models usually include a display to help with setup and fault finding, which can save time during installation and maintenance.
In simple terms, BSR relays suit basic safety needs, SSR relays cover most standard machine safety tasks, TSR relays add controlled timing, and USR relays offer the most flexibility for complex or changing systems.
| Product | Sentry type | Supply voltage | Outputs | Best suited for |
|---|---|---|---|---|
| ABB Sentry BSR10 | BSR basic relay | 24 V DC | 3 NO + 1 NC | Simple emergency stop circuits and basic safety monitoring |
| ABB Sentry BSR23 | BSR expansion relay | 24 V DC | 4 NO + 1 NC | Expanding the number of safe outputs from an existing safety relay |
| ABB Sentry SSR10 | SSR single-function relay | 24 V DC | 3 NO + 1 NC | General machine safety monitoring for stops and guards |
| ABB Sentry SSR10M | SSR single-function relay | 85–265 V AC / 120–275 V DC | 3 NO + 1 NC | Same as SSR10 but powered directly from mains voltage |
| ABB Sentry SSR20M | SSR single-function relay | 85–265 V AC / 120–375 V DC | 3 NO + 1 NC | Flexible safety monitoring where supply voltage may vary |
| ABB Sentry TSR10 | TSR timer safety relay | 24 V DC | 3 NO + 1 NC | Safety circuits needing adjustable timing functions |
| ABB Sentry TSR20 | TSR timer safety relay | 24 V DC | 3 NO + 1 NC | Applications needing off-delay before a machine stops |
| ABB Sentry USR22 | USR universal relay | 24 V DC | 2 NO + 2 delayed NO | Flexible safety applications using many device types |
Why buy ABB Sentry relays from LED Controls Ltd?
Buying your ABB Sentry safety relay from LED Controls means you get genuine ABB products, clear technical information and access to knowledgeable support if you need help choosing the right model.
Whether you are upgrading an existing machine or building a new control panel, ABB Sentry Safety Relays from LED Controls Ltd offer a reliable and straightforward way to improve safety with confidence. Get in touch to get yours:
01706 242050
[email protected]
ledcontrols.co.uk
