User guide

Projecting Guidelines
System Description, AutroSafe Integrated Fire & Gas Detection System, 116-P-ASAFE-IFG/XE Rev. B, 2005-10-27,
Autronica Fire and Security AS
Page 42
5.2.3 Cable data
Standard loops Recommended cable: Screened cable; maximum
loop reistance 50Ω, CSA 1.0mm
2
.
PowerLoop Recommended cable: Screened cable; maximum
loop resistance depends on load; CSA 1.5-2,5mm
2
Larger installations may require up to 10mm
2
.The
maximum cable length is 1000m.
Communications Recommended cable: CAT5
Loops - Maximum length Maximum
resistance /
capitance
Cable
dimensions
Length
50Ω / 0,5μF 2 x 0,75 18 1000m
2 x 1,5 15 2000m
2 x 2,5 13 3300m
N. B. The maximum resistance on the total cable
length (+ and – conductors) is 50Ω.
AUTROLON
The recommended cable type on the AUTROLON is Category 4 or 5
cable, for example, ABB art. no 10892 30 "CAT.5 UTP 4x2/0.5mm
2
DATAKAB.
AutroFieldBus
The AutroFieldBus cable is normally 2-wire twisted pair category 5
copper cable, however, fibre optic cable is possible by use of separate
signal converters. The AutroFieldBus uses the same guidelines as
AUTROLON, in terms of cable lengths, fibre modem and boosters.
PowerLoop
Must be shielded. Max length 1000m. Each powerLoop needs to be
shielded separately. Parallell paths of powerloop cables may
introduce crosstalk between different loops. Avoid this by separating
possible parallel paths. Dual shielding or shielding barriers should be
used in this case to minimise crosstalk.