OPERATION MANUAL FOR LK3A-2 LINK UNIT NOMAD LK3A-2 Tested To Comply With FCC Standards FOR HOME OR OFFICE USE
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS PAGE 3 of 9 1. INTRODUCTION..................................................................................................................4 2. SPECIFICATION .................................................................................................................4 2.1 CERTIFICATION .............................................................................................................................. 4 2.2 CABLE LENGTHS ............................
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS 1. PAGE 4 of 9 INTRODUCTION The LK3A-2 link unit is a remote transceiver for the NOMAD system. Its purpose is to provide the radio link to wireless NOMAD terminals. Several of these link units can be connected to the same controller via a single twisted pair cable. Each link unit is powered from a 12V DC supply. 2. SPECIFICATION Power Average Consumption Radio link Frequency 2.1 10-18V DC 100mA 916.
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS 2.2.2 12V DC supply: # Of Link Units 1 2 3 4 1.0mm2 171 133 108 92 1.5mm2 256 199 163 138 15V DC supply: # Of Link Units 1 2 3 4 1.0mm2 427 332 272 230 1.5mm2 641 499 408 345 PAGE 5 of 9 Network Cabling The maximum cable length for the network cable is dictates the distance from the controller to the farthest link unit. This is typically 1km. Note that if the controller is centrallly placed this gives a maximum distance from one end to the other of 2km.
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS 3. PAGE 6 of 9 INSTALLATION The LK3A-2 has been designed to be permanently installed 3.1 MOUNTING Whilst the general location for each link unit will be dictated from a system viewpoint individual link units should adhere to the following guidelines 1. Avoid mounting adjacent to metal pillars etc. 2. The antenna should have a vertical orientation. It is usual to mount the link unit suspended over a main path with the antenna pointing vertically downwards.
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS PAGE 7 of 9 Take care on 12V DC powered units to observe the correct polarity. Cables connected to the link unit should be fixed so that any moisture running down the cable does not is directed away from the link unit. All glands must be tightened - any unused glands should be fitted with a blanking plug. 3.
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS PAGE 8 of 9 Note that switch SW1 position 6 (leftmost) is reserved for factory test mode and should be in the 0 (down) position for normal use. 3.4 ANTENNA Screw the antenna directly into the link unit as per figure 1. Never attempt to use a cable to extend the antenna or mount it remotely from the link unit. Never connect anything over than the supplied antenna to the antenna port. 4. MAINTAINENCE The link unit is designed to give maintenance free service.
NOMAD™ - LK3A-2 OPERATING INSTRUCTIONS PAGE 9 of 9 NETWORK DATA CABLE IN AND THROUGH SUSPENSION WIRES ANTENNA PORT LINK UNITS SHOULD BE CENTRALLY MOUNTED ABOVE MAIN PATH. AVOID MOUNTING ADJACENT TO METAL POSTS WHERE POSSIBLE. ANTENNA SHOULD POINT VERTICALLY DOWNWARDS.
