Centurion G-ULTRA 4G GSM Control Unit  including Sim Card Product Image
Centurion G-ULTRA 4G GSM Control Unit  including Sim Card Product Image

Centurion G-ULTRA 4G GSM Control Unit

R 2,699.00 Incl. VAT
R 3,444.00 Incl. VAT

Available to order online or collect at 6 Cosmic Street Linbro Park, Sandton, 2090 (Map)


Product Brochure  Installation Manual  Guide Button  Wiring Diagram

With the Centurion G-ULTRA 4G GSM Control Unit, 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.



  • Monitor up to four electrical devices by receiving push notifications
  • Use the outputs to control up to six devices from your phone (two additional onboard relays)
  • Open, Close and Intelligently monitor your gate status via your phone
  • Control a multitude of access automation devices such as gate motors and garage door operators
  • Flexible scheduling, automatic activations, and visitor control – ideal for B & Bs and Guesthouses
  • 1500 user memory
  • LCD screen for easy access to diagnostics
  • Instant activation via MyCentsys Remote mobile app
  • Easy setup via G-WEB PLUS online interface
  • Ironclad Security – Password protection means no one else can control you G-ULTRA


Devices that can be monitored via the inputs:

  • House alarm: activated
  • Electric fence: alarm triggered
  • Geyser status: On/Off
  • Mains power: On/Off
  • Fridge aboard your boat: On/Off
  • Borehole pump status: Running/Off
  • Water reservoir: Full/Empty
  • Entrance gate status: Open/Pedestrian


Devices that can be controlled via the outputs:

  • Automated entrance gates
  • Geysers
  • Appliances, e.g. the fridge aboard your boat
  • Air conditioners
  • Borehole pumps
  • Lighting systems
  • Irrigation and water features
  • Alarm systems



 Supply Voltage Range 11-24VDC
Maximum Current Draw 300mA @ 12 VDC
Input / Output Current Rating 50mA (Open Collector)
Relay Contact Current Rating 1A, 30V AC/DC (Resistive)
Input Sense Voltage Range 0-24VDC (0-1.6V Low Input State, 5V-24V High Input State)
SIM Card Micro Format, Activated MTN® SIM Card Supplied. 1, 2 NOTE: The supplied SIM Card may only be used with this specific G-ULTRA device. The SIM Card will be deactivated and blacklisted upon insertion into any other GSM device.
Number of configurable Input / Output Channels 4
Number of Relays 2
Memory Capacity • 1500 Access numbers • 5000 Event logs • 20 Access Profiles • 1 Custom Welcoming SMS Message for New Access Numbers • 20 Custom Output Activation SMS Messages (From User to Device) • 30 Custom Input Notification SMS/Email Messages (From Device to User) • 100 Visitor Time-barring Windows (Windows are the periods between two dates) • 30 Generic Time-barring Windows (Windows are weekly recurring) • 10 Output Activation Schedules (Schedules are weekly recurring) • 3 Daylight Saving Periods • 4 Input to Output Mapping Configurations
Degree of protection IP40
Product Dimensions
Product Weight
Packaging Dimensions
Mass of unit packed
Warranty 24 months limited Manufacturer’s warranty


Additional information pertaining to the G-ULTRA 4G GSM:
1. May not be used in devices other than G-ULTRA.
2. Remains the property of Centurion Systems (Pty) Ltd.


Warnings and Limitations on the G-ULTRA 4G GSM:
1. All installations must be done by a suitable qualified technician
2. Under no circumstances may any of the components be modified.


1 x Centurion G-ULTRA 4G GSM Control Unit (Sim card included in unit)


The images shown are for illustrative purposes only. Actual product may vary slightly.

Drop element here!