Categories: GSM Devices

Centsys G-Switch ULTRA – GSM


The Centsys G-ULTRA is a powerful and versatile access automation solution that allows you to open and close your gate, arm your house alarm, monitor mains power and perform a host of other advanced monitoring and control actions – all using your phone!

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Centsys G-ULTRA GSM Module

A powerful and versatile access automation solution that allows you to open and close your gate, arm your house alarm, monitor mains power and perform a host of other advanced monitoring and control actions – all using your phone!

With the G-ULTRA, your entire world fits into the palm of your hand, giving you complete control at your fingertips.

This is the evolution of GSM technology, designed to offer you the ultimate flexible, mobile-based access control and monitoring solution and allowing you to transcend archaic notions of what GSM can achieve. Unbridled. Unchained. Unmatched. Ultra.

Customizable for:

•     B & Bs and guest-houses – with flexible scheduling, time-barring and automatic activations
•     Complexes – 1500 user memory
•     Existing gate motors – open, close and intelligently monitor your gate status, all via your phone!
•     Access automation – control a plethora of access control devices including gate motors, traffic barriers and garage door operators
•     Miscellaneous security applications – be notified via SMS, missed call or email of alarm activations, electric fence triggers and mains power failures



Security Password protection means that no one else can control your G-ULTRA. Passwords can be changed as often as necessary so your security is never compromised, and only numbers that have been learned into the G-ULTRA are able to operate it. Effortlessly enable and disable your G-ULTRA devices, or suspend access numbers, for maximum security,
either via SMS or using CENTURION’s secure and convenient G-WEB PLUS web interface. (Weekly and Visitor) Set arrival and departure dates and times; guests will only be able to activate the device’s outputs between these limits, giving you maximum security and affording your guests maximum convenience.

As a special value-add developed specifically with B & B owners in mind, customized arrival and departure messages with welcoming messages, access instructions, etc., can be sent automatically to guests and visitors. Alternatively set weekly recurring time-periods (for example 8am to 5pm, Monday to Friday) during which users will have access to the system. Outside of the configured time-periods, access will be denied.

Add the ability to map inputs to outputs, customize the input and output notification messages and use the G-ULTRA in advanced applications, such as industrial fridge/freezer temperature monitoring, and you have a powerful and convenient GSM-based monitoring and control solution.

Up to 20 separate text messages with up to five scheduled outputs can be configured. Time barring windows can be configured to block notifications, activations or specific access numbers. Monitoring and alerting The G-ULTRA looks after your property when you’re not around. It can be configured to monitor up to four separate electrical devices, such as your home alarm or even a water reservoir. It could send you an SMS, give you a missed call or even send you an email, letting you know if your alarm is on or off or your reservoir is full or empty.

When configured as inputs, the unit’s four individually-configurable channels can be configured to react to Rising Edges, Falling Edges, or both, which makes it ideal for monitoring variable levels such as mains power. A single input can be used, for example, to send a notification to users when mains power has failed, and the same input can notify users once it comes back on, freeing up the other inputs to take care of monitoring duties for other devices. Intelligent monitoring of gate status with the G-ULTRA, your peace of mind is not dependent on physical proximity, and the rules of physics can be bent so that it’s almost like you’re two places at once.

With seamless integration with CENTURION gate motors, your G-ULTRA will let you know when your gate has been left open, or is in any other state specified by you through intelligent monitoring of the gate motor’s status output. Adjustable Filter settings mean that you can specify under which conditions you are notified about a particular gate status, for example if the gate has remained open for longer than 20 seconds.

Easy access to diagnostics This smart device provides intelligent feedback via a graphic user interface displaying status, system information and diagnostic messages for the complete ULTRA experience. Dependable access control for big events With the G-ULTRA’s Any Number Mode feature, you can temporarily allow access to anyone in possession of the module’s mobile number. This is a very convenient solution for parties, corporate functions and other soirées since you don’t have to manually add and delete hundreds of users – the G-ULTRA will be your bouncer! Then, after the event, simply disable Any Number Mode and return the unit to full, ironclad security, on your phone’s keypad to remotely activate the output.

It’s like waving a magic wand! You can turn a seemingly endless list of electrical appliances and devices on and off just by using your phone and, using the Sticky Latch feature, latched outputs will ‘remember’ their states if power to the device is cycled ensuring that fickle power supplies will never leave you powerless.

The G-ULTRA boasts four channels, individually configurable as either inputs for monitoring or outputs for control – and we’ve even thrown in an additional two relays to give you even more control at your fingertips.

Remote administration with G-WEB PLUS The only thing easier than using the G-ULTRA is administering it. Our intuitive G-WEB PLUS website lets you configure, monitor and receive reports on-line.

G-WEB PLUS provides a great-looking, user-friendly and easy-to-navigate interface, enabling you to change multiple settings using a single synchronization versus multiple SMS commands. The on-line portal helps you keep track of settings, access numbers and transaction logs and further expands the Ultra Universe with heaps of fantastic features developed to make your G-ULTRA really come alive.


Memory Battery voltage monitoring and Battery Saver Mode

The G-ULTRA can remember and communicate with 1500 different users – making it perfect for either residential, commercial or even industrial applications. Further adding to this product’s incredible versatility as an access control and monitoring solution for virtually any application, we’ve increased its on board memory to cater for access profiles, event logs and a host of other customizable features. Avoid being left out in the cold with the G-ULTRA’s reliable battery monitoring facility.

Your module will monitor its power source as closely as you monitor your daughter’s new boyfriend, and send you an SMS notification if the voltage falls too low as well as shutting down to conserve battery life and prevent the battery from being damaged.

Access Number Profiles

The access number configuration profiles eliminate the hassle of configuring inputs and outputs and permissions every time that a new number is added. We’ve done the hard work for you!
Control Forgot to switch on the alarm before you left home? Don’t turn the car around… Control your home – from your phone. Simply Missed Call (free) the G-ULTRA or send it an SMS, either from your mobile phone or from CENTURION’s secure web portal, G-WEB PLUS. Or, even better, just press a digit Smart hardware An internal GSM antenna ensures healthier, more reliable network signal strength without the frustration of trying to find the optimal location to mount the unit. If you need to fit the G-ULTRA in a metal enclosure, simply attach an external antenna to the on-board connector.

G-SPEAK ULTRA Brochure (440KB)G-SPEAK ULTRA Quick Guide (1029KB)