FAQs

The causes of this failure may be as follows:

1. Improper device wiring to the ground.
2. Damaged devices in the loops or sounder circuits.
3. Problems in the electrical main supply to the panel.
4. Humidity in the installation wiring.
5. Failure of the panel hardware.

This fault condition arises when there is a leakage current between any wiring connected to the panel and ground where the panel is connected.

You should always use shielded cable of the type appropriate for fire detection installations. Please note that cable types are also regulated by local authorities/ standards.

As a rule of thumb you should use:
a) 0,8 mm² for loop lengths up to 500 m
b) 1.0 mm² for loop lengths up to 800 m
c) 1.5 mm² for loop lengths up to 1200 m
d) 2.5 mm² for loop lengths up to 1500 m

Mentioned loop lengths include return to the main panel.

The maximum recommended length is approximately 1200 m, but this value depends largely on the cable cross section and the load of the devices in that loop. We developed the GFE LOOP CALCULATOR software where it is possible to verify if your system has an appropriate loop length.

The hardware depends of the used communication technology according to the following:

• Connection via RS-232 to short distances (maximum 3 m).
This system can only be used when connecting just 1 JUNO NET or panel to ODYSSEY.
1) J-NET-QUART
2) J-NET-ADV-COMS-RS232-RS485 but with RS232 IC’s fitted
3) Serial cable connecting Panel to PC’s serial port directly

• Connection via RS-485 to long distance (maximum 1200 m).
1) J-NET-QUART
2) J-NET-ADV-COMS-RS232-RS485 but with RS485 ICs fitted
3) RS232-to-RS485 converter from BB Electronics to be fitted at the PC
4) Cable interconnecting panels and Converter

• Connection via Fiber Optics to longer distance (maximum 4000 m).
1) J-NET-QUART
2) J-NET-ADV-COMS-FO
3) RS232-to-Fibre Optics converter from BB Electronics (FOSTC) to be fitted at the PC
4) Fiber optic Cable interconnecting panel and Converter. Terminations are ST type and fiber has to be type multimode 125/62.5 um

• Connection via TCP/IP using LAN (Local Area Networks).
1) J-NET-QUART
2) J-NET-ADV-COMS-TCP/IP
3) Computer (PC) needs to be fitted with an Ethernet board

This application is a PC based remote supervision solution that allows graphical control and monitoring of up to 64 fire detection systems comprising by GFE range of addressable panels.

To establish communication (mode 1) check the following points:

• Disconnect all panels, sub-panels and repeaters, this should be done with the panel completely off.
• The cable length should not exceed 1,5 meters.
• The cable must of extension type.
• Confirm if the selected PC serial port will be used to communicate.
• Confirm that no other application is using that communication port, if so quit the application and restart the PC.
• Confirm that the red TX LED is switching on the JUNIOR panel motherboard or on the JUNO NET Con board.
• Access function 8-4-2 in order to enable communication with the main panel.
• Begin the required process (download/upload) in the GFE CONNECTOR software.

There are 3 operating modes available:

1. Programming mode, which allows you to configure and program and download it to the panel.
2. Online mode that shows the addressable devices present in the detection loops.
3. Firmware update mode.