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CIRCUIT BREAKER – A press-to-reset circuit breaker is provided.
When it is “tripped” due to an electrical surge or overload, it pops out and
shuts down output power to the outlets. To reset the Circuit Breaker, press
it in.
Caution: When resetting the Circuit Breaker, push the button in quickly,
and release the button. Do not hold the Circuit Breaker button
in. Failure to comply may result in equipment damage.
SYSTEM GROUND Screw
The S20BLK allows the grounding wires from your equipment to be
connected to a central terminal screw located on the rear of the unit. This
ground connection eliminates ground loop problems. Connect all
equipment ground wires to this terminal to break any possible ground
loops that can cause an audible ‘hum’.
BUILDING WIRING FAULT Indicator
If this indicator is lit, then one of three wiring problems exists in the
building wiring circuit:
• Missing ground
• Overloaded neutral
• Reversed polarity
Contact a licensed electrician to resolve the problem.
Input Power Connector
Connect one end of the supplied AC power cord to the S20BLK AC input
power connector. Connect the other end of the power cord to the AC
utility power source (120 Vac, 15A, 50 to 60 Hz).
ENVIRONMENTAL Port
The temperature probe, and the optional temperature/humidity probe,
connect to this port to provide temperature and humidity readings, which
are displayed on the TEMPERATURE and HUMIDITY environmental
screens.
Ethernet Port
The Ethernet port enables a user or installer to monitor and/or manage the
S20BLK over the network via any Web browser. This data can also be
viewed via the NMC or RS-232 serial port.
Note: This port can only be functional if the USB cable is not
connected to the S20BLK.
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