Installation
LSS4 Field Wiring
The total length of the RS-485 communications loop used to connect
multiple annunciators when used with an LSS4 panel cannot exceed
4,500' (1372 M) in total length, based on #18 AWG twisted-pair wire.
Note: The terminals on the annunciators cannot accept wire greater
than #18 AWG.
Wire the annunciators per the figures that follow. The table below lists
these connections.
Table Chapter 3-2: Annunciator LSS4 Terminal Connections
TERM Function Connect to
TB1-1 Enable/Disable Sw
(+) External Key switch-open switch
disables panel, requiring password
(not supervised)
TB1-2 Enable/Disable Sw
(-) External Key switch-open switch
disables panel, requiring password
(not supervised)
TB1-3 RS-485, Ch 0 (+)
From LSS4, RS-485E (+), To/From
Term #7 of additional LSRA(-C)
TB1-4 RS-485, Ch 0 (-)
From LSS4, RS-485E (-), To/From
Term #8 of additional LSRA(-C)
TB1-5 RS-485, Ch 1 (+)
Not Used
TB1-6 RS-485, Ch 1 (-)
Not Used
TB1-7 + 24 VDC
+ 24 VDC Power Supply
TB1-8 24 VDC Common
24 VDC Common Power Supply
TB1-9 Earth Ground
Local earth ground
RJ-11
WHT
RS-232, Common
RS-232 - Common on printer
(To common on PC serial port when
downloading) (not supervised)
RJ-11
RED
RS-232 T
X
Out
RS-232 - Rx In on printer
(To data Rx on PC serial port when
downloading) (not supervised)
RJ-11
YEL
RS-232 Rx In
RS-232 - Tx Out on printer
(To data Tx on PC serial port when
downloading) (not supervised)
Note: Refer to Figure Chapter 3-3 for RJ-11 Wiring Color Code.
EOL Resistor Installation
UL listed 100 Ohm EOL resistors (P/N 260071 or EOL-100) are used
to terminate the RS-485 circuit. The RS-485 terminating EOL resistor
should be installed ONLY at the last physical connection location on
the data line.
3.10
LSRA Installation, Operation, Maintenance, and Configuration Manual
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