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10.3. Configuration

10.4. Wiring Diagrams

10.3.1.  G-WEB

10.3.2.  SMS Commands

1. Complete the wiring of the unit as per Section 8 and 10.4 of this  

 document.
2. Power up the device and verify that the device connects to the G-WEB  

  platform by referring to the LCD home screen.
3. Navigate your Internet browser to http://www.gweb.co.za  

  (or www.g-web.com.au for Australia and New Zealand) and login to your  

  existing profile or, alternatively, register a new profile.

4. On the My Devices page, select Add New G-ULTRA Device and follow the  

  onscreen instructions to associate the device to your profile.
5. Configure the device with the desired settings using your online portal.

All features – both basic and advanced – can be easily, and remotely, 

configured via the G-WEB online interface. By simply logging into G-WEB  

using any Internet-enabled device, one can add and delete devices, specify 

text for input and output notifications and activations, modify device 

characteristics and a plethora of other features, all from the comfort of one’s 

home or office. G-WEB can be accessed by navigating to http://www.gweb.

co.za (or www.g-web.com.au for Australia and New Zealand). Note that it 

will be necessary to register if you have not previously done so.

The table below lists the optional basic SMS commands available on the 

G-ULTRA. All basic and advanced configurations can be done via the G-WEB  

online portal.

Quick Add:

  

To instantly associate a device to your online profile, scan 

the QR code using your mobile phone and any universal QR 

scanner mobile application.

SMS Command

Description

P.XXXX

1

.STATUS

Device Status Request to

 which the device 

will respond with the following information:
•  IMEI
•  Supply Voltage
•  Signal Strength
• 

Device date & time

P.XXXX.AP.Number

Add New Phone Number

 which will by 

default pulse Relay 1 by missed call

P.XXXX.DP.Number 

Delete a specific access number from the 

G-ULTRA’s memory

P.XXXX.OUT.Y.ON

Switch output ON 

where Y is the 

corresponding output number

IO1 Y=1, IO2 Y=2, IO3 Y=3, IO4 Y=4, 

RELAY1 Y=5, RELAY2 Y=6

P.XXXX.OUT.Y.OFF

Switch output OFF 

where Y is the 

corresponding output number

IO1 Y=1, IO2 Y=2, IO3 Y=3, IO4 Y=4, 

RELAY1 Y=5, RELAY2 Y=6

1. XXXX = Device Default Password

TABLE 4

10.2. Installation

10.2.1. Wall-mounting

10.2.2. DIN Rail-mounting

FIGURE 5

FIGURE 6

FIGURE 7

FIGURE 8

FIGURE 9

FIGURE 10

FIGURE 11

FIGURE 12

FIGURE 13

Reverse the procedure under Section 10.1 to re-assemble the 

G-ULTRA.

G-ULTRA Fascia

Main G-ULTRA 

Unit

The Mounting Plate is used to mount the G-ULTRA device to a wall. Use four 

screws with wall anchors(not supplied) to secure Mounting Plate.

Clip the G-ULTRA main unit into the Mounting plate after it has been 

secured to the wall; a ‘click’ will be heard if done correctly.

Should the G-ULTRA need to be mounted onto a DIN-rail, a DIN-rail 

mounting kit is available. Ask at Centurion Systems (Pty) Ltd for more 

information.

Secure the DIN-rail clips to the back of the mounting plate using four (4) 

screws.

Position the bottom of the DIN-rail clips onto the rail, and clip the top end 

into position(A). A ‘click’ will be heard if it has been done correctly(B).  Clip 

the G-ULTRA main unit into the Mounting plate after it has been secured to 

the wall; another ‘click’ will be heard if done correctly.

To remove the unit from the DIN-rail, remove the G-ULTRA main unit from the 

mounting plate as described in Section 10.1. Insert a small flat screwdriver 

into the hole(s) shown in Figure 10, and gently pry the clips from the rail.

Mounting 

Plate

Mounting 

Plate

Mounting 

Plate

Mounting 

Plate

Mounting 

Screws

G-ULTRA 

Main Unit

Mounting 

screws  

(Not Supplied)

Wall 

anchors

DIN-rail

Clips

The fascia can be removed by inserting the tips of one’s fingers into the 

slots (as shown in Figures 4 and 5), and pulling outward and upward.  

The fascia should pop off without effort.

10.1.2. Removing the Fascia

FIGURE 4

G-ULTRA Fascia

Slots

•  I/O Status
•  Firmware Version
•  Relay Status

‘click’

B

A

DIN-rail

Clip

Holes for  

Screwdriver

Mounting 

Plate

DIN Rail

DIN rail

Clip

DIN-rail

DIN-rail

Gate Status Monitoring

GND

IO4

NO

IO1

NO

COM

IO2

COM

NC

IO3

NC

+ VDC -

G-ULTRA

D-Series  

Controller

GND

IO4

NO

IO1

NO

COM

IO2

COM

NC

IO3

NC

+ VDC -

G-ULTRA

D-Series  

Controller

Trigger (Pulse)

Trigger - Pedestrian (Pulse)

GND

IO4

NO

IO1

NO

COM

IO2

COM

NC

IO3

NC

+ VDC -

G-ULTRA

D-Series  

Controller

Do not mount close to DOSS sensor or remote receiver.

Do not mount close to DOSS sensor or remote receiver.

Do not mount close to DOSS sensor or remote receiver.

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