GE KTD-405 - Connecting Multiple Keypads with STP Cable

KTD-405/KTD-405A/KTD-405-2D Controller Keypad
User Manual
16
Connecting multiple keypads with STP cable
Adhere to all installation guidelines while making connections, including your local codes and those provided
in Installation guidelines on page 8
Figure 11. KTD-405 and KTD-405A connections via STP cables
12 VDC (observe polarity, if provided transformer and plug not used)
RS-485 to I/O box of additional keypad via STP cable (with floating shield)
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 DVMRe’s; ground at mux/DVMRe)
Note: When using STP for the RS-485 connection between I/O boxes, you can use only one of the two RJ45 RS-485 OUT
connections to a multiplexer or DVMRe. This ensures proper termination.
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.)
78910653214
POWER 12 VDC
BIAS
SWITCH
78910653214
RS485
A
B
A
B
+
AUDIO KEYPAD RS485 RS485
A
B
RS422 IN
RS422 OUT
SPEAKER SHIELD
SPEAKER
REMOVABLE TERMINAL STRIP
EARTH GROUND
12345678
78910653214 78910653214
POWER 12 VDC
BIAS
SWITCH
78910653214
RS485
A
B
A
B
+
AUDIO KEYPAD RS485 RS485
A
B
RS422 IN
RS422 OUT
SPEAKER SHIELD
SPEAKER
REMOVABLE TERMINAL STRIP
EARTH GROUND
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