KTD-312
Computer Interface/Data-merger
© 2003 GE Interlogix, Video Systems Group
All Rights Reserved.
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For the latest product specifications, visit GE
Interlogix, Video Systems Group, online at
www.ge-interlogix.com or contact your Video
Systems Group sales representative.
For technical support before and after
installation, call 800-469-1676.
Technical support is available 24 hours a day, 7 days
a week.
Call: Tech Support 800-469-1676 (6
A.M. – 5 P.M. PST Monday through Friday)
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Fax: Tech Support 541-752-9096 (avail abl e 24 hours a day)
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Web: www.ge-interlogix.com
Item number 1040057A / October 2003
This equipment has been tested and
found to comply with the limits for a
Class A digital device, pursuant to part
15 of the FCC Rules. These limits are
designed to provide reasonable
protection against harmful interference
when the equipment is operated in a
commercial environment. This
equipment generates, uses, and can
radiate radio frequency energy and, if
not installed and used in accordance
with the instruction manual, may cause
harmful interference to radio
communications.
You are cautioned that any changes or
modifications not expressly approved
by the party responsible for compliance
could void the user's authority to
operate the equipment.
KTD-312 Installation Manual
BEFORE YOU BEGIN
Read these instructions before installing or operating this product.
Note: This installation should be made by a qualified service person and should conform to
local codes.
This manual provides installation and operation information. To use this
document, you must have the following minimum qualifications:
• A basic knowledge of CCTV systems and components
• A basic knowledge of electrical wiring and low-voltage electrical
hookups
Use this product only for the purpose for which it was designed.
Customer Support
For assistance in installing, operating, maintaining, and troubleshooting
this product, refer to this document and any other documentation
provided. If you still have questions, contact Technical Support:
GE Interlogix, Video Systems Group
Call: 800-469-1676
Fax: 541-752-9096
Note: You should be at the equipment, ready with details before calling Technical Support.
Conventions Used in this Manual
Boldface or button icons highlight command entries. The following
WARNING, CAUTION, and Note statements identify potential hazards:
* WARNING:
Improper use of this equipment can cause severe bodily injury or
equipment damage.
** CAUTION:
Improper use of this equipment can cause equipment damage.
Note: Notes contain important information about a product or procedure.
* This symbol indicates electrical warnings and cautions.
** This symbol indicates general warnings and cautions.
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KTD-312 Installation Manual
INTRODUCTION
The KTD-312 Interface Unit provides a communication link between the
Digiplex
computer to have control of the system. The KTD-312 can also function
as a Digiplex “data merger” for combining Digiplex control signals from
two sources. The KTD-312 cannot function simultaneously as a data
merger and a computer interface. The following describes the interface
protocol and how the KTD-312 is installed in the Digiplex system. Refer
to the ASCII Protocol Document for control protocol information.
CCTV control system and an external computer, enabling the
COMPUTER INTERFACE
The computer interface is standard RS232. Five of the RS232 lines are
used: TX, RX, COMMON, RTS, & CTS. RTS is not currently recognized.
CTS is normally asserted but is turned off for a short interval at the end
of each command string. If the internal buffer of the KTD-312 is full, CTS
will remain off until space is available.
The serial format is 8 bit data with no parity. The most significant bit is
always 0. This is equivalent to 7 bit data with parity always 0.
DATA MERGER
NORMAL MERGE
Merge permits two incoming Digiplex control data streams to form a
single data-stream output that contains the control information from both
inputs (subject to some restrictions).
The merge input does not pass time/date functions (as from a KTS-253)
or alarm functions (as from a KTD-463). It also does not pass
programming information (from KTD-404s to KTD-405s or KTD-463s).
Thus, the merge input is best suited for serial from other controllers
(such as KTD-404s or KTD-405 s which do not have KTS-253 or KTD463 “upstream”) in normal control operation. In addition, if the merge
input receives more data than the unit is capable of moving to the output
stream, that data is discarded.
MERGE WITH COMPUTER REPORTING
When configured to operate as a merger, the received data is still
available as an output to a computer. This output operates at the same
baud rate as the merge input.
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KTD-312 Installation Manual
To utilize this output, connect the computer as described for computer
interface operation. All transmissions by the computer are ignored at the
unit.
INSTALLING THE KTD-312
J
UMPER SETTING
See Figure 1 and perform the following:
1) Remove the KTD-312 cover.
2) Locate the jumper near the DIP switch.
3) Set the jumper for the appropriate function (
computer interface (see Figure 1).
Figure 1. Jumper location and settings for data merger and computer interface.
data merger or
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KTD-312 Installation Manual
CABLE CONNECTIONS FOR COMPUTER INTERFACE
12V Wall Transformer
RJ45/DB9 Connector
KTD-312 RS422 Out To System
RS422 In DTMF Call-In (if used)
Figure 2. Computer Interface
1) Connect wires as indicated in Figure 2.
2) Connect the RJ45/DB9 to the computer serial communication port.
Note: The computer cable supplied with the KTD-312 is an RJ45 cable, which plugs
directly into the KTD-312. An RJ45 to DB9 adaptor is supplied for connection to the
computer’s serial communication port.
3) Plug in the power supply to the unit.
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KTD-312 Installation Manual
CABLE CONNECTIONS FOR DATA MERGER
Figure 3 shows cable connections to be used when operating as a data
merger
Note: CALL SIGNAL IN is optional and is used to handle DTMF annunciation from door
receivers.
See Appendix A for information about the connections to DB25 serial.
12V Wall Transformer
RS422 Control Signal Out
Merge RS422 Control Signal In
Figure 3. Data Merger
RS422 Control Signal In
KTD-312
DTMF Call Signal In
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KTD-312 Installation Manual
SETTING THE DIP SWITCH
Switch 1 defines the unit type. Switches 2 and 3 are currently not used
and should remain off. See Table 1.
Table 1. Setting DIP switches for the desired mode of operation
DIP
Switch
Function Setting
1 Mode
2 N/A
3 N/A
Primary RS422
4
Baud Rate
RS232/Secondary
5
RS422 Baud Rate
6 Not Used
7 Not Used
8 Not Used
OFF = Computer Interface mode
ON = Data Merger mode
OFF = Remains off regardless of mode
ON = Should be in OFF position
OFF = Remains off regardless of mode
ON = Should be in OFF position
OFF = 4800
ON = 2400
OFF
ON
Interface mode= 9600
Merge mode=4800
Interface mode=2400
Merge mode= 2400
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KTD-312 Installation Manual
LEDS
The LED is useful for diagnosing problems with the computer interface.
ON POWER UP
• In interface mode, the green LED is on.
• In merge mode, the red LED is on.
IN USE
• In interface mode, the green LED toggles with each RS232
character received.
• In merge mode, the red LED toggles with each merge command
received.
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KTD-312 Installation Manual
APPENDIX A
DB9
Adaptors can be purchased for conversion between DB9 and DB25
connectors. The adaptor needed for this should be DB9 male on one end
and DB25 female on the other. If it is designed for RS232 operation, the
connections should be wired together.
Note: If you cannot locate an adaptor for purchase, an adaptor can be constructed easily
using a DB9 male connector, a DB25 female connector, and a cable with a minimum of five
wires. For most computers, the two connectors are wired as shown in Table A1.
TO DB25 ADAPTOR
Table A1. RS232 Connections
Signal DB-9 Pin DB25-Pin
RxD 2 3
TxD 3 2
COM 5 7
RTS 7 4
CTS 8 5
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