GE KTD-405, Руководство пользователя, Страница: 19 / 76

Chapter 2
Installation
15
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.)
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
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
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.
A
B
C
D
E
F
G
H
I
J
K