DIGITAL LHD CABLE
Shield Digital
Linear Heat Detection Cable
uses xed temperature detection technology to provide an easy method for
sensing changes in temperature levels. The cable can oer alternative overheat
protection in a vast range of applications and environments, from tunnels, cable
trays, warehousing to sensing changes in temperature within escalators and
other applications where many risks of re are hidden from view.
The digital linear hear detection cable can be directly connected to a
single zone of a conventional fire alarm control panel, or, using an
addressable zone/switch monitor, the digital linear heat detection cable can
easily be interfaced to an addressable loop.
Digital linear heat detection cable is comprised of a pair of twisted low
resistance, tri-metallic conductors, sheathed in advanced temperature sensitive
polymers. When the cable reaches the required temperature the two twisted cores
will fuse together, with a re triggering resistor attached to the input
interface and single core of linear heat cable to activate an alarm at the main
fire panel.
DIGITAL
CONTROL MODULE
A UL864 10th edition approved Digital Control Module is available and
provides additional benefits when used with the Digital LHD cable. It can
simultaneously monitor up to two zones of LHD cable and has separate fault and
alarm outputs for each zone. A built in display shows the state of each zone,
including the distance in meters and feet to the alarm point if an alarm is
triggered. It also includes an RS-485 Modbus RTU output for integration with a
PLC or SCADA system.
FEATURES
- UL 521
Approved.
- CE
Marked.
- Up to
10,000ft (3000m) per zone.
- Detection
along the entire length of sensor cable.
- Optional
Nylon extrusion offering UV protection and increased durability for
outdoor use.
- Optional
Polypropylene extrusion for increased chemical protection in caustic
environments.
- Optional
stainless steel over-braiding for increased mechanical protection.
Construction |
Overall insulated, twisted pair of
tri-metallic cores |
Insulation |
1kV tested protective outer coat |
Additional Insulation Options |
Nylon, Polypropylene or Stainless Steel
braiding |
Approvals |
CE Marked, RoHS Compliant, UL |
Maximum Zone Length |
3,000m (10,000ft) |
Wire Overall Diameter |
3.60mm to 5.08mm (0.142″ to 0.200″) |
Minimum bend radius |
50 mm (2″) |
Ambient Temperature Range: (dependent upon
action temperature) |
-40°C – 125°C (-40°F – 257°F) |
ELECTRICAL |
|
Max Voltage Rating |
30Vac, 42Vdc |
Resistance |
~100/km (29/kft) per leg |
Velocity of Propagation |
~55% |
Capacitance |
88 – 150 pF/m (26 – 45 pF/ft) |
Inductance |
540 – 1050 nH/m (165 – 320 nH/ft) |