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Cable Specifications - Honeywell CENTRA LINE EAGLEHAWK Installation & Commissioning Instructions

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EAGLEHAWK CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS

Cable Specifications

Panel Bus I/O Modules
When checking the length of the power supply cable, the
connection cables to all Panel Bus I/O Modules must be
taken into account.
Table 14. Power supply cable specifications
max. length
3 m (from transformer to final module)
min. 0.75 mm
cross section
EIA 485 Cable Specifications
The following cable specification is valid for all EIA 485 buses
(e.g., Panel Bus and BACnet MS/TP).
Table 15. EIA 485 cable specifications
max. length
1000 m
twisted pair, shielded (foil or braided
cable type
shields are acceptable)
characteristic
100...130 Ω
impedance
distributed
capacitance
Less than 100 pF per meter (30 pF per
foot)
between
conductors
distributed
capacitance
Less than 200 pF per meter (60 pF per
between
foot)
conductors and
shield
The following cables fulfill this requirement:
AWG 18;
shielded, twisted pair cable J-Y-(St)-Y 2 x 2 x 0,8;
CAT 5,6,7 cable (use only one single pair for one bus);
Belden 9842 or 9842NH.
EN1Z-1005GE51 R0216
2
(AWG 18)
Field Devices
Depending on the distance from the controller, field devices
can be supplied with power by the same transformer used for
the Panel Bus I/O Modules, or by a separate transformer,
using cables as specified in Table 16.
Table 16. Power / communication cable specifications
type of signal
 100 m (Fig. 23)
single transformer
24 VAC power
1.5 mm
0...10 V signals
0.081 – 2.08 mm
For wiring field devices, see section "Powering Panel Bus I/O
Modules and Field Devices" on page 12.
Routing Cables to Field Devices
Route low-voltage signal and output cables to field devices
separately from mains cables.
Table 17. Minimum distances to power mains cables
cable
min. distance
shielded
10 mm (0.4 in.)
unshielded
100 mm (4 in.)
All low-voltage signal and output cables should be regarded
as communication circuits in accordance with VDE 0100 and
VDE 0800 (or NEC or other equivalent).
 If the general guidelines for cable routing are observed, it
is not necessary to shield field device signal and power
supply cables.
 If, for whatever reason, the routing guidelines cannot be
observed, the field device signal and power supply cables
must be shielded.
– Shielding of cables leading to field devices must be
grounded only at one end.
– Do not connect the shield to the EAGLEHAWK
controller.
18
cross-sectional area
 400 m (Fig. 22)
sep. transformers
not allowed for
2
(16 AWG)
> 100 m (300 ft)
2
(28 – 14 AWG)

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