Danfoss VLT 8000 AQUA Instructions d'exploitation télécharger pdf (Page 23)

MG.60.N2.02 - VLT is a registered Danfoss trademark

VLT

5000 / VLT

6000 HVAC / VLT

8000 AQUA

System

Performance

• Up to 64 FTT-10 transceivers, or 128

LPT-10 transceivers, are allowed per

network segment.

• Both types of transceivers may be

used on a given segment, provided

that the following constraint is met:

(2 x number of FTT-10 transceivers) +

(number of LPT-10 transceivers)

≤128.

System

Specifications

Free topology system specifications and

transmission specifications are described

below. Both specifications should be met to

ensure proper operation.

The transmission specification depends on

such factors as resistance, mutual

capacitance and the velocity of propagation.

The system designer may choose from a

variety of cables, depending on cost,

availability, and desired performance.

Performance may vary with cable type.

Contact Echelon for cable types and the

characterization of system performance.

Note that the following specifications are for one

network segment. Multiple segments may be

combined using repeaters to increase the

number of nodes and distance.

Transmission

Specifications

Free Topology nodes run at 78 kbps

transmission speeds.

Doubly-

Terminated

Bus

Topology

Specifications

Free

Topology

Specifications

• The average temperature of the wire

must not exceed 55° C (131° F),

although individual segments of wire

may be as hot as 85° C (185° F).

Danfoss recommends the use of shielded LonWorks

communication cable for instance Belden 8719. See

also section 12

Plug in terminal Connector

Cable

Specifications

Maximum bus length for Maximum bus length for

segments with segments with both FTT-10

FTT-10 transceivers only and LPT-10 transceivers

Belden 85102 2700 m / 8858 ft 2200 m / 7217 ft

Belden 8471 2700 m/ 8858 ft 2200 m / 7217 ft

Level IV, 22AWG 1400 m / 4593 ft 1150 m / 3772 ft

JY (St) Y 2x2x0.8 900 m / 2952 ft 750 m / 2460 ft

Maximum Maximum

node-to-node distance total wire length

Belden 85102 500 m / 1640 ft 500 m / 1640 ft

Belden 8471 400 m / 1312 ft 500 m / 1640 ft

Level IV, 22AWG 400 m / 1312 ft 500 m / 1640 ft

JY (St) Y 2x2x0.8 320 m / 1050 ft 500 m / 1640 ft

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 43 44

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Danfoss VLT 8000 AQUA Instructions d'exploitation Page 23

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