Kentec Electronics Syncro Focus Operation And Maintenance Manual

Contents

4. CablingCables should be brought into the cabinet using the knockouts provided and where necessary, usingcouplers to maximise the space within the enclosure.Inlet bushings or cable glands should be used to maintain insulation of signal cores from earth.The screen or drain wires should be bonded to the earth terminals provided.The maximum size of cable, which can be terminated, is 2.5 mm.The communications protocols are highly immune to noise but sensible segregation from knownnoise generating sources such as mains cables is recommended.The mains version of the repeater panel requires a 230V AC supply, which should be derived from aseparate fused spur, labelled “fire alarm - do not switch off”.The mains supply must include an earth conductor connected to the fixed installation earthingsystem of the building.A ferrite ring is fitted to mains powered versions of the repeater panel to suppress high voltagetransients. The incoming mains cable must be passed through this ring twice before it connects tothe power supply terminals, therefore tails should be left long enough to cater for this.This equipment relies on the building installation for protection and requires a 5-amp protectiondevice. The mains supply should use cable with a minimum cross section of 1.5mm.5. Connecting to the RepeaterAll connections to the repeater are via 5mm pitch, 2.5mm capacity, spring leaf terminal blocks. Careshould be taken to use the correct sized terminal screwdriver and not to over tighten the terminals.Polarity must be observed carefully on any terminals with + or – markings.The “NET IN” terminals must connect to the “NET OUT” terminals of the previous panel on thenetwork. The “NET OUT” terminals must connect to the “NET IN” terminals of the next panel on thenetwork.Do not connect or disconnect circuits with the power on.Man-1081_Syncro_Focus+_04 Page 4 of 13