DN1315-1007
12
KT-300 Door Controller Installation Manual
Combus Repower (If Required)
Depending on how many modules are connected to the Combus
and how far they are from the KT-300 controller, you may need to
“repower” the controller’s Combus.
The Combus needs to be “repowered” if the voltage drops below
12.5 Volts between black and red wires of the last module of each
loop (the modules will still operate but there will be no
communication between the modules and the controller and a
“Combus module defect” event will be generated from the
controller). This voltage drops if modules are drawing too much
current (500mA maximum for the Combus of each KT-300).
Verify this voltage with a multi meter, and determine if you need to
install a KT-PC4204 in “repower” mode. Using this configuration, you
will be provided with an additional 1 amp of current on the
controller’s Combus. The KT-PC4204 is generally installed at the
beginning of the loop.
When using the KT-PC4204 in “repower” mode, the first relay of the
module will be reserved for the “repower function”. You will have to
assign an “all valid” schedule to the first relay so it is “always
activated” (refer to the Controller definition section of your
EntraPass
User Reference Manual
for the exact procedure.)
If you are using a KT-PC4204 in “repower” mode and other KT-
PC4204 modules that are assigned as relays 1-4 or KT-PC4216
modules that are assigned as relays 1-16 are also connected to the
same loop, do not use relay 1 of those modules or relay 1 of the KT-
300 door controller. Please also note that all KT-PC4204 modules
that are used for Combus repower should be assigned as relays 1-4.
NOTE:
Jumper 1 “J1” on the KT-PC4204 must be moved to the
Combus relay position.
NOTE:
Do not use any power supply other than the KT-PC4204 to repower the Combus. In the event of a power surge or
transient, a module may lock up and cease to communicate with the controller. If the KT-300 loses communication with
the module, it will initiate a module reset and will power down the Combus for five seconds in an attempt to reset the
problem module. After five seconds, the controller will reapply power to the Combus and the problem module should
begin to operate as intended.
Module Housing Cabinet
Kantech Part:
KT-4051CAB
Measurement
: 16.8” H x 10.4” W 4.1” D (42,5cm H x 26.4 cm W x 10.4 cm D)
Color
: Black
Cabinet will hold either:
•
One KT-PC4204 power supply/relay module with batteries
•
Three KT-PC4216/KT-PC4108 modules
•
Up to six (6) KT-PC4108A/KT-PC4216 modules, mountable on both sides of the
cabinet (three modules on each side)
