Completing the installation, Check main power wiring, Putting the rack back together – ETC Unison ERn Rack-mount Control Enclosure User Manual
Page 34: Aux power and linkpower status indicators
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Unison
®
ERn Rack Mount Enclosure Installation Manual
Completing the Installation
It’s a good idea to look over the entire installation before applying power to the enclosure.
•
Clean out dust and debris from the enclosure interior.
•
Check for loose connections, bare wires, and damaged insulation.
Check Main Power Wiring
Check resistance between line, neutral, and ground busses with a digital voltmeter (DVM).
•
Line to ground resistance should be 10M Ohm or higher.
•
Neutral to ground resistance should be 0 Ohm.
•
Line to neutral resistance should be 10M Ohm or higher.
Putting the Rack Back Together
Re-install the rack power supply into the top slot of the ERn enclosure. For an ERn4 230
VAC enclosure, re-install both rack power supplies into the enclosure. One rack power
supply installs in the standard top slot and the other in the lower option module slot.
Aux Power and LinkPower Status Indicators
When power is applied to the ERn, the Paradigm repeater module LEDs located on the
front panel illuminate, indicating the status of the auxiliary power, LinkPower control
network, and connected stations.
The Aux Power and LinkPower LEDs indicate in green when the Paradigm station power
module is connected properly and auxiliary power and LinkPower are present. When there
is an unbalance in LinkPower the fault indicators illuminate. This condition typically means
that the station wiring is at fault, however it could mean a connected device is having an
issue. A qualified technician should inspect the system wire and terminations first, then
proceed to disconnecting devices to pinpoint the fault and correct it. The power supply will
update the fault indicators automatically when the fault condition is cleared.
•
If the NET A line has a fault (is shorted or has leakage to ground), the Fault + LED lights.
•
If the NET B line has a fault (is shorted or has leakage to ground), the Fault - LED lights.
•
If neither fault LED is illuminated the data connections are properly installed and the
stations are receiving the data and power required for operation.
W A R N I N G :
Power must be turned OFF when you perform this procedure. ETC
recommends that your facility adopt a Lockout/Tagout procedure to
maintain safety of maintenance personnel. Reference
for general guidelines.
ERn door removed from graphic for
clarity of rack power supply
installation.