
Installation
KTD-405/405A User Manual
14
1036547C / December 2003
3.3.4 C
ONNECTING
M
ULTIPLE
K
EYPADS WITH
RJ45 C
ABLES
Adhere to all installation guidelines while making connections, including your local codes and those
provided in section
3.1 Installation Guidelines
.
12 VDC (observe polarity, if provided transformer and plug not used)
RS422 IN (data in from devices such as alarm units, ASCII converters, or keypads (see guidelines))
RS422 OUT (data out to devices such as domes, switchers, or keypads (other than KTD-405s))
AUDIO OUT (to speaker and speaker shield)
RS485 OUT (data out to devices such as multiplexers or DVMRe’s; ground at mux/DVMRe)
Observe polarity for:
•
Audio
•
RS422
•
RS485
•
12 VDC power
(12 VDC transformer
must have a positive
center polarity plug
)
RS485 to I/O box of additional keypad via RJ45 cable
KEYPAD IN (RS422 and RS485 data in from keypad; RS422 data and power out to keypad)
AUDIO IN (from keypad)
PIN 1 to RS485 shield (ground one end only)
PIN 3 to RS485 A
Note:
When using
multiple keypads,
you can connect
CyberDomes and
other receivers to
the RS422 output
from any keypad.
PIN 6 to RS485 B
Note:
PINs 2, 4, 5, 7, and 8 are not connected.
Figure 11. KTD-405 and KTD-405A connections via RJ45 cables
Содержание KTD-405
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