Trane Engineered Smoke Control System Application Manual page 42

Chapter 2 Pre-installation considerations
30
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
Monitored data paths
Refer to the best wiring practices
given in BMTX-SVN01A-EN for
installing Lontalk communication
links.
Refer to the wiring requirements
given in CNT-SVN01C-EN for the I/O
bus wiring between the Tracer
MP580/581 and the EX2s.
Unmonitored data paths
3 ft (1 m)
(NFPA 72A [2002] section 6.15.2.2)
20 ft (6 m) and in conduit
(NFPA 72A [2002] section 4.4.7.1.8)
Note: Questions regarding this information given in this table should be
directed to the authority having jurisdiction (AHJ), if possible.
Type
Trane LonTalk communication link
Tracer MP580/581 EX2 I/O bus com-
munication link
Unmonitored distance from pilot
relay or controller output to actuator
FACP to Tracer MP581/EX2 interface
wiring
FSCS to Tracer MP581/EX2 interface
wiring
BAS-APG001-EN