© 2018 All rights reserved. Data subject to change without notice.
27
Rev. B | 2018.08
LPT-P- Operation Manual
In large system applications, if the recommended maximum cable length needs to be exceeded, an
LNK-XT Network Extender can be used to boost the waning signal strength. One LNK-XT extends the
network length by an additional 610 m (2000 ft). It is recommended that an LNK-XT be installed
approximately every 32 LPT-P devices, or when a drop in voltage is detected.
6 SYSTEM OPERATION & CONFIGURATION
NOTE:
The LPT-P is
not
a standalone gas detection device as it does not have an internal buzzer or
on board relay. The LPT-P must be connected to a controller, a control panel, Direct Digital Control
system (DDC) or Building Automation System (BAS).
The LPT-P continuously monitors gas concentrations on the confi gured channels and communicates
the information back on request to a C
ontroller or BAS / DDC via Modbus® RS-485 RTU. Based
on the gas concentration readings, the Controller or BAS / DDC will trigger the safety responses
(alarms, relays, etc.) as it has been programmed.
6.1 Navigating the Menu Structure
There are three programming push-buttons inside the enclosure that can be used to navigate
through the LPT-P menu structure, or you can use the magnetic wand without needing to open the
enclosure (refer to
Section 4.1 Exterior Enclosure
for location of the magnetic switches. The three
magnetic switches are indicated by an ARROW UP, ENTER and ARROW DOWN along the side of the
enclosure. The magnetic switches function the same as pressing the buttons inside the enclosure.