Chapter 2: Installation
20 ModuLaser Modular Aspirating Smoke Detector Installation Manual
Connections
Recommended cables
Recommended cables for optimal system performance are shown in the table
below.
Table 3: Recommended cables
Cable requirements Maximum cable length
cable 3 × 1.5 mm
2
30 m (98.4 ft.) [1]
Up to 2.5 mm
2
(13 AWG) N/A
RS-485 data cable up to 2.5 mm
2
1.2 km [0.75 mi.]
Standard USB cable with A-B connectors 3 m (9.84 ft.) [1]
[1] Observe maximum length to comply with the EMC requirements of EN 54-20.
Other types of cable may be used subject to site-specific electromagnetic
interference (EMI) conditions and installation testing.
Securing cables
Use cable glands to ensure clean and secure connections. All cables should be
fed through the cable knockouts on the top, bottom, or back of the housing and
secured to eliminate movement.
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