CLSS Gateway - Installation and Users’ Manual | P/N:LS10248-000HW-E | REV. F | FEB/11/2022 106
Gateway Board Connections Connecting to the Panels
C.1.1 Connecting to a Fire Alarm Panel
The panel sends data from all its devices to the connected CLSS Gateway. The data
transmission is based on the connection type and the panel compatibility.
Improving the Signal Fidelity
An RS-485 loop of a panel with long cable and multiple devices may affect the signal
fidelity. The gateway at the end of such an RS-485 loop can improve the signal fidelity
with its termination resistor.
To enable the termination resistor on the gateway board:
If RS-485A is connected, switch the S4 switch to ON. If RS-485B is connected, switch the
S5 switch to ON.
When there are no signal issues or when the gateway is not at the end of the loop, ensure
that the S4 and S5 switches are switched to OFF.
WARNING: WHILE THE GATEWAY IS WORKING DO NOT REMOVE CONNECTIONS TO THE GATEWAY, CLSS
SITE MANAGER, AND THE PANEL.
NOTE: When the gateway is communicating to a central station through cellular
connection, it uses the primary Ethernet connection for CLSS Site Manager
communications.
NOTE: The interfaces of the gateway board and the panels must be connected only with
compatible cables, devices, and wirings.
NOTE: The total power a panel can distribute among its connected devices is limited.
Therefore, before connecting the CLSS Gateway to a panel, ensure that the panel can
continue to supply the required power to the gateway as well as other connected
peripherals.
Refer to the panel and other peripherals’ documents to know their power requirements.
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