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DN1237-0003 © 1997-2000 Kantech Systems Inc.
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Step 4. Grounding
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AWG#18 grounding wire to GND
Since the KT-200 uses high performance communications, proper
grounding must be provided to insure proper operation. An
AWG#18 single conductor solid copper wire must be used to
ground each controller to a good earth ground as per the local
electrical code (be careful about ground loops). The ground clamp
should be located below any other ground. It is also recommended
to provide an AWG#18 single conductor copper wire between
each controller.
Step 5. Tamper Protection
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Install optional tamper switch on cabinet
A tamper switch may be installed on the unit to detect an
unauthorized opening of the cabinet. The normally closed tamper
switch is connected to the and TAMPER- (last inputs
located at the bottom of the right side connector sets.) This input
must not be wired to devices outside of the KT-200 cabinet. If the
tamper input is not used, install a jumper across the terminals.
Step 6. Hooking Up Inputs
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Check each input loop for EOL's
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Connect devices to inputs 1 to 16
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Only one open contact per loop!
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Green resistor for odd inputs (1,3,5,7...)
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Red resistor for even inputs (2,4,6,8...)
The KT-200 has the capability of monitoring 16 input points. To
reduce cabling, the 16 points are grouped under 8 sets of terminals
identified 1 to 16. (Installing in series with the monitored device
contacts, a 7.5K Ohms (GREEN) resistor for the odd input and a
4.7K Ohms resistor (RED) for the even input, enables the KT-200
to monitor both points on one single cable pair).
To provide line security, resistors must be installed at the moni-
tored device (contact, detector...). The resistors shipped with the
KT-200 have been identified with Green for Odd (7.5K) and Red
for Even (4.7K).
The maximum distance of one line is 600m (2,000 feet) with
AWG#22.
Inputs can be used to monitor open devices such as thermostats
but it is not recommended to monitor two open contacts on one
input terminal set as such wiring provides reduced line integrity.
If required, it is possible to get enhanced line integrity and 24 hour
line supervision by using even resistors (Red 4.7K) with normally
open contacts and using the odd resistor (Green 7.5K) as end of
line. Only one point per terminal set can be monitored for devices
wired in this configuration for a total of 8 inputs per KT-200.
Inputs 1-2 are ideally reserved for the first controlled door contact
as input 1 and the associated request-to-exit detector as input 2.
Inputs 9-10 are ideally reserved for the second controlled door
contact as input 9 and the associated request-to-exit detector as
input 10. There is no obligation to follow this rule but such a
standard convention makes it easier for servicing.
Unused inputs on the KT-200 should be terminated by EOL
resistors or defined as open inputs to reduce useless status
reporting of abnormal conditions.
Step 7. Relays & Auxiliary Outputs
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Connect relay to low voltage devices
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Add external relays for high voltage devices
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Connect auxiliary outputs to readers & local
warning devices
The KT-200 provides 2 control relays that may be activated or
deactivated by schedules or input conditions. The relays are
single pole normally open and closed contacts rated at 30VDC/
24VAC, 2 amp maximum.
Devices generating high levels of electrical noise or arcing (such
as electromagnet coils) should not be directly connected to these
output relays as noise or arcing current could be induced into the
