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DN1237-0003 © 1997-2000 Kantech Systems Inc.
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The distance between the readers and the KT-300 controller
varies by reader type (please consult the reader manual for details).
Auxiliary outputs provide access operation visual and/or audible
feedback at the controlled door . Outputs “OUT DOOR 1 LED &
BUZ” are used for the first door and “OUT DOOR 2 LED & BUZ”
are used for the second door.
The 12 VDC auxiliary power can also be used to power low current
audible devices usually located at the controlled door.
Step 8. Relay Control Outputs
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Connect controlled outputs to low voltage devices (25mA
max.)
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Add external relays for high voltage devices - (optional -
Kantech # KT-RM1)
The KT-300 provides two controlled outputs - RL1 & RL2 (open
collector to 12 VDC current limited to 25mA). Use a KT-RM1
(optional) to switch larger currents or voltages or to supply a dry
contact.
Can be expanded up to 16 controlled outputs when using a KT-
PC4216 module. This module allows a maximum of up to 50mA per
output. Since the KT-300 only supports 500mA, a power supply
module can be used to provide an additional 1A to the Combus.
Note: 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 (see Combus Repower).
Step 9. Auxiliary Outputs
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Connect auxiliary outputs to readers & local warning
devices
Auxiliary outputs are used for visual and audible signals. They can
be activated according to schedules, input conditions or events
and local alarms.
Auxiliary outputs “OUT DOOR 1 & 2 LED” provide visual feed-
back of access operation, and auxiliary outputs “OUT DOOR 1 &
2 BUZ” can activate audible warning devices, such as T.REX, to
signal door alarms.
Step 10. Tamper Protection
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Install tamper switch on cabinet - (optional - Kantech
part #KT-300TAMP)
A tamper switch may be installed on the unit to detect unautho-
rized opening of the cabinet (Kantech part no. KT-300TAMP).
The normally closed tamper switch is connected to an input
(choose an unused input (5 to 8) as tamper input or any other
unused inputs on the KT-PC4108 module (if used).
Note: The tamper switch is required for a UL listed installation.
Step 11. Connecting the KT-300
KT-300
KT-300
KT-300
KT-300 to the
RS-485 Bus
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Connect RS-485 cable to X1+, X1- and GND
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If not using VC-485: connect a 120 ohm end-of-line
resistor on the first and last KT-300 (X- & X+)
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If using VC-485: connect a 120 ohm end-of-line resis-
tor on the last KT-300 only (X- & X+)
Controllers are linked together through their RS-485 connec-
tors. The maximum communication loop length with the appro-
priate cable is 1.2 kilometers (4,000 feet). Connecting several
KT-300 controllers at a single point is not acceptable nor are
“Y” or “spider web networks”.
The RS-485 communication loop should be wired with Ethernet
Category 3 double twisted pair network cable (see cable specifi-
cations Belden 1227A or equivalent). The RS-485 loop can operate
from 1,200 to 115,200 baud under normal conditions. Intermittent
communication problems or erratic operation may require to slow
down the network speed to 9,600 or 19,200 baud. Varying the
network speed does not perceptibly change the operation speed
of the system. Usually, most installations should be set at 19,200
baud.
Without a VC-485: Connect a 120 ohm end-of-line resistor be-
tween terminals X1- and X1+ of the first and last KT-300.
With a VC-485: Connect a 120 ohm end-of-line resistor between
terminals X1- and X1+ of the last KT-300. No need to connect on
the first KT-300 since the VC-485 contains an end-of-line resistor.
Step 12. Connecting the Master Controller
to the Host Computer
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Connect flat cable from the KT-300 to the computer
From 0 to 30m (0 to 100 feet):
If the local master controller is located less than 30m (100 feet) from
the host computer, use the On-Board RS-232 RJ12 jack and the
supplied flat cable.
From 30 m to 60m (100 to 200 feet):
Since the master controller can be located up to 60m (200 feet) from
the host computer, an extra 100 feet cable can be added to the
existing cable (Kantech part no. CAB100ext).
From 60m to 1.2 km (200 to 4,000 feet):
If, on the other hand, the master controller is located more than
60m (200 feet) , an optional VC-485 multifunction communica-
tion interface must be used. It can also be used when running
communications cable in areas unusually high in electrical
noise.
