50 Amended: April 22EMEA Fire Technical Support: DF6000/CF3000 Applications GuideThe network can be wired as either a Loop or a Radial. If Booster devices are used the system mustbe run as a RadialThe maximum cable length before Boosters are used is 1000m.The Terminator resistors are fitted across the network to smooth out the signal. The network requires51ohms across pos & neg when checked at any card on the network, this can be achieved by cuttingoff or soldering on resistors as required. (See Figs 39, 41, 42 & 43)On the later version network card this process has been improved by selecting the switches providedon the PCB for loop topology or radial (bus) and terminator in or out.NOTE Connection details on the terminal block are not polarity sensitive.Cable TypesThe recommended cable for the network connection between panels is an enhanced cablemanufactured by Draka Cables (Pt No 910234). Screen continuity must be maintained throughout theentire network circuit including each junction point. This can be achieved in 2 ways,1. Link the screens through using connector block at each node and drain the screen down toone point only, generally this method would be used in one building with older Network cards(fig 36).2. Connect the screen to the terminal block on the Network card (fig 46) which has acapacitor/resistor filter circuit. Where the network passes between buildings, screen continuityshould not be maintained from building to building. The screen should be connected to theearth of one panel in each building.Where the total network length is greater than 1000m or Network errors are encountered then abooster device can be used. This means that the network must be wired as a radial and theterminator resistors set correctly (figs 41 & 42) The Booster works on a supply voltage of 9-35 v DC.This means that the Easicheck or DF6000 panel external 24v output can power this device.The Booster has two modes of operation ‘Smart Switch mode’ and ‘Configured Router’, for allapplications we use the former mode. In this mode the device automatically detects the bit-rates ofthe connected channel, copies the information detected on the network and forwards it to the nextnetwork card.ConfigurationsNetwork configuration without Boosters - RadialFig 43