Interlogix KTD-405 Series User Manual - Manual (Page 19)

Chapter 2
Installation
15
Connecting multiple keypads with RJ45 cables
Adhere to all installation guidelines while making connections, including your local codes and those provided
in
Installation guidelines on page 8.
Figure 10. KTD-405, KTD-405-2D, and KTD-405A connections via RJ45 cables
12 VDC (observe polarity, if provided transformer and plug not used)
RS-422 IN (data in from devices such as alarm units, ASCII converters, or keypads (see guidelines))
RS-422 OUT (data out to devices such as domes, switchers, other keypads (not KTD-405s))
AUDIO OUT (to speaker and speaker shield)
RS-485 OUT (data out to devices such as multiplexers or DVMRes; ground at mux/DVMRe)
RS-485 to I/O box of additional keypad via RJ45 cable
KEYPAD IN (RS-422 and RS-485 data in from keypad; RS-422 data and power out to keypad)
AUDIO IN (from keypad)
PIN 1 to RS-485 shield (ground one end only)
PIN 3 to RS-485 A
PIN 6 to RS-485 B (PINs 2, 4, 5, 7, and 8 are not connected.)
78
9
10
6
5
3
2
14
POWER 12 VDC
BIAS SWITCH
78
9
10
6
5
3
2
14
RS485
A
B
A
B
+ AUDIO
KEYPAD
RS485
RS485
A
B
RS422 IN
RS422 OUT
SPEAKER SHIELD
SPEAKER
REMOVABLE TERMINAL STRIP
EARTH GROUND
78
9
10
6
5
3
2
14
78
9
10
6
5
3
2
14
POWER 12 VDC
BIAS SWITCH
78
9
10
6
5
3
2
14
RS485
A
B
A
B
+ AUDIO
KEYPAD
RS485
RS485
A
B
RS422 IN
RS422 OUT
SPEAKER SHIELD
SPEAKER
REMOVABLE TERMINAL STRIP
EARTH GROUND
1 2 3 4 5 6 7 8
Observe polarity for:
• audio
• RS-422
• RS-485
• 12 VDC power. Transformer must have a
positive center-polarity plug
Note: When using multiple keypads, you can
connect CyberDomes and other receivers to
the RS-422 output from any keypad.Only one
RS communication can be chained together,
if both are hooked up on 405 I/O boxes then
performance will degrade or it will not work
at all.
A
B
C
D
E
F
G
H
I
J
K