Chapter 2 Pre-installation considerations

Note:

Process verification, sometimes referred to as end-to-end testing, can be considered a means of monitoring data (NFPA 92A [2000] section 3.4.6). Communicated values are an example of process verification. A communication link can be monitored for quality, and the system can be notified if there is a communications failure.

Distance limitations for unmonitored data paths are severely limited.

Table 8. Cabling practices and restraints

Maximum distance

Type

Monitored data paths

 

 

 

Refer to the best wiring practices

Trane LonTalk communication link

given in BMTX-SVN01A-EN for

 

installing Lontalk communication

 

links.

 

 

 

Refer to the wiring requirements

Tracer MP580/581 EX2 I/O bus com-

given in CNT-SVN01C-EN for the I/O

munication link

bus wiring between the Tracer

 

MP580/581 and the EX2s.

 

 

 

Unmonitored data paths

 

 

 

3 ft (1 m)

Unmonitored distance from pilot

(NFPA 72A [2002] section 6.15.2.2)

relay or controller output to actuator

 

 

20 ft (6 m) and in conduit

FACP to Tracer MP581/EX2 interface

(NFPA 72A [2002] section 4.4.7.1.8)

wiring

 

FSCS to Tracer MP581/EX2 interface

 

wiring

 

 

Note: Questions regarding this information given in this table should be directed to the authority having jurisdiction (AHJ), if possible.

30

BAS-APG001-EN

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Image 42
Trane BAS-APG001-EN Cabling practices and restraints, Maximum distance Type Monitored data paths, Unmonitored data paths

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