Power Wiring - Liebert 232 User Manual

Power Wiring

CAUTION: The SiteGate-232 modules are Class 2 devices (less than 30 VAC). Take appropriate
isolation measures when mounting a SiteGate-232 module in a control panel where Class 1 devices or
wiring are present.
NOTE: Whenever possible, terminate and verify power and communication to all modules before
terminating any inputs and outputs.
1. Terminate AC power at the wiring source (usually a circuit breaker or other AC source).
2. Apply power to the transformer.
3. Turn the SiteGate-232's power switch OFF (see Figure 1 for location) to prevent the module from
being powered up until proper voltage is verified.
4. If you are using an internally grounded transformer, terminate the Earth Ground wire to the Gnd
screw terminal as indicated in Figure 4.
CAUTION: Be sure to follow proper polarity on power connections. Note INCORRECT power wiring
in Figure 5.
If the transformer is not internally grounded, terminate the two power wires as indicated in
Figure 6.
5. Verify that 24 VAC is present at the power input terminals and turn the SiteGate-232's power
switch on.
6. Once the power wiring procedure has been completed, the "Run" LED should turn on and begin
blinking. If this does not occur, turn the power switch off and check for wiring errors.
Figure 4: SiteGate-232 module Figure 4: SiteGate-232 module Figure 4: SiteGate-232 module Figure 4: SiteGate-232 module Figure 4: SiteGate-232 module
powered by transformer with Earth powered by transformer with Earth powered by transformer with Earth powered by transformer with Earth powered by transformer with Earth
Ground Ground Ground Ground Ground
Rev. (08-JULY-98)
F i g u r e 5 : INCORRECT F i g u r e 5 : F i g u r e 5 : F i g u r e 5 : F i g u r e 5 : INCORRECT INCORRECT INCORRECT w i r i n g o f t h e INCORRECT w i r i n g o f t h e w i r i n g o f t h e w i r i n g o f t h e w i r i n g o f t h e
SiteGate-232 module powered by SiteGate-232 module powered by SiteGate-232 module powered by SiteGate-232 module powered by SiteGate-232 module powered by
transformer with Earth Ground transformer with Earth Ground transformer with Earth Ground transformer with Earth Ground transformer with Earth Ground
6
Figure 6: SiteGate-232 module Figure 6: SiteGate-232 module Figure 6: SiteGate-232 module Figure 6: SiteGate-232 module Figure 6: SiteGate-232 module
powered by transformer with Floating powered by transformer with Floating powered by transformer with Floating powered by transformer with Floating powered by transformer with Floating
Ground Ground Ground Ground Ground
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