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2-8 LightStream 2020 Installation Guide
Wiring a DC-Powered System
Figure 2-3 Connections to DC-powered Chassis
Wiring Procedure
Warning The wiring task should be performed only by a licensed electrician or qualified service
personnel. Untrained personnel may be exposed to hazardous DC voltages.
To wire a DC-powered LS2020 switch to a DC power source, perform the following steps:
Step 1 Ensure that the circuit breaker/power switch on each DC power tray is OFF.
Step 2 Ensure that power to the circuit to which you will connect the LS2020 switch is OFF.
Step 3 Connect the three system power wires to the LS2020 terminal block, using the slot-tipped
screwdriver to secure the terminals. Do not remove the terminal covers at the base of the
terminal block.
Step 4 To connect the alarm circuit, remove the plastic terminal block cover (see Figure 2-3) and
set it aside for the time being.
Step 5 Connect the alarm wires to the LS2020 terminal block, using the Phillips screwdriver to
secure the terminals.
Step 6 Replace the terminal block cover.
Terminal block
for alarm circuit
Terminal block
for system power
Removable cover
Circuit breaker/
power switch
H3690