I/O Box Connections; Rj-Cable Connections - GE KTD-405 User Manual

I/O box connections

RJ-cable connections

The RJ-cable connections make new installations or additional devices easy to connect. If you are replacing an
old phone-style I/O box in an existing installation, you can use the existing twisted-pair wires (STP for RS-485
and UTP for RS-422), if desired. See
Adhere to all installation guidelines while making connections, including your local codes and those provided
in Installation guidelines
Figure 7. RJ-cable connections to the I/O box
Multiplexer or DVMRe
EARTH GROUND
A
RS485
B
A
RS422 IN
B
A
RS422 OUT
B
SPEAKER SHIELD
+
SPEAKER
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.
Twisted-pair connections
on page 8.
Pin 1: RS-485 shield
Ground one end only;
preferably at mux/
DVMRe.
Crossover Straight-through
on page 12.
Pin 3: RS-485A Pin 3: RS-485B
1 2 3 4 5 6 7 8
Chapter 2
Installation
Pins 2, 4, 5, 7, 8 are
not connected.
RS-485 (optional RJ45
connection*)
For DVMRes, multiplexers,
ProBridges, and additional
KTD-405 I/O boxes.
RS-485 (optional RJ45 RS-
485 connection*)
For DVMRes, multiplexers,
ProBridges, and additional
KTD-405 I/O boxes.
KEYPAD
Black RJ45 ( ) control
cable. (Use the new cable
with the new I/O box, not the
old silver crossover RJ45
cable.)
Audio
Silver RJ11 cable from
keypad (provided only with
the KTD-405A).
* The installer supplies the
optional RJ45 RS-485
cables with the stated
pinouts (an RS-485
connection is also
available on the terminal
strip).
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