PHASTLink Cable Information
5
Appendix: PHASTLink Cable Information
PHASTLink Cable Information
This section contains information that you will need to make PHASTLink cables, plus general
information on connecting PHASTLink devices.
PHASTLink cables are used to connect all PHASTLink-compatible devices, including keypads,
dimmers, J-box IR devices, amplifiers, audio switches, etc. PHASTLink uses a standard 10BaseT
connection (i.e. Cat 5 wire and RJ-45 connectors), and the wire should be connected in the standard
manner illustrated in the following table. If the standard EIA/TIA 568A color code is followed,
wiring problems will be minimized.
The system comes with a 15-port hub built into the PLB-CF10 cardframe. The maximum length of
PHASTLink wire per port is 1,000 feet.
Each PHASTLink device has two RJ-45 jacks to allow multiple devices to be daisy-chained on one
PHASTLink port. Remember to always terminate the unused RJ-45 jack of the last device (or the
only device) in a chain of PHASTLink devices (see
Building a Double 120-ohm Terminator
for
details).
!
The limit for each home run is 500 mA or 10 PHASTLink devices, whichever comes first
(FIG. 1). Extra hubs can be added to provide additional ports.
!
Only one Landmark LCD keypad (i.e. DMS or IMS) can be used per port, so always
home-run each keypad.
!
Some PHASTLink devices (particularly those devices that require two-way
communication to the Master) have relatively high bandwidth requirements. These
devices (including SAM modules, the PMB-TCC Remote Television Control Center, and
ITI Printer/Automation Module) should also not be daisy-chained.
PHASTLink Cable Information
Pin #
Wire Color
Polarity
Function
1
White/Green
+
Transmit
2
Green
-
Transmit
3
White/Orange
-
Mic
4
Blue
-
Ground
5
White/Blue
+
12VDC
6
Orange
+
Mic
7
White/Brown
+
Receive
8
Brown
-
Receive
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
RJ-45 Socket
RJ-45 Plug
It is important that the correct pairing is observed.
Transmit, Receive, and Mic
need to be on twisted pairs. Splitting pairs (e.g., using a white/green wire with a blue/
white wire for transmit) will result in increased crosstalk, and may result in bus failure
or noise on the intercom.
