Detcon 880S-N4X - Manual (Page 14)

880-N4X
880-N4X Instruction Manual Rev. 0.0 Page 10 of 36
3.1 Initial Power Checks
Upon completion of all field wiring, apply power to the 880 by: 1) setting both the AC Circuit Breakers and
DC Circuit Breakers to “ON”, 2) pushing the “POWER ON/OFF” switch on the front panel. The “POWER”
LED should illuminate. If all connections have been made properly, the “FAULT” and “ALARM” LED’s
should not be illuminated. The unit will go through a brief initialization and display the “Main Screen”
(Figure 26, Section 4.3). The “AC” box on the display should be green showing that AC is attached to the
unit. The “USB” box should be gray to indicate that no USB drive is attached.
Measure the voltage across the power supply output (V+ and V-). The reading should be 24 ±2.4VDC. If the
voltage is out of tolerance, make adjustments using the 24VDC Adjustment Potentiometer on the 24Volt
Power Supply.
Continuous Loading 24VDC/10A Continuous Loading 24VDC/10A
C US US C C US US C
45JB
100-240VAC 3.5A Maximum
Power Factor Corrected
100-240VAC 3.5A Maximum
Power Factor Corrected
Frequency : 50/60Hz
Frequency : 50/60Hz
Made in China
Input Details Input Details
L N
DC ON DC ON
V.ADJ V.ADJ ALM ALM
R R
H H
Output Details Output Details
+V +V +V +V -V -V -V -V
24VDC Adjust
Figure 13 24VDC adjustment
3.2 Auxiliary 24VDC Input
If an Auxiliary 24VDC Input is connected to the unit, the voltage may need to be adjusted to insure proper
operation. If the 24VDC input is being used to operate the unit, the source must be able to provide at least
7Amps to insure proper unit operation. The unit utilizes a 10A Circuit Breaker to provide over current
protection.
Measure the voltage across TB3 terminals 4 and 5. This voltage should read above 21.6VDC and below
26VDC.
If the 24VDC input is to be used as a Backup or Auxiliary 24VDC Input, adjustments may be required to
insure that it is below the internal power supply voltage. If the voltage measured across the Power Supply is
lower than the Auxiliary 24VDC Input, the internal power supply will not be used to supply power to the unit.
The Auxiliary 24VDC Input to the unit should be adjusted to at least 0.1-0.15VDC below the unit’s 24V
Power Supply for correct operation. This will insure that the unit does not operate on the Auxiliary 24VDC
Input unit unless the AC power is lost.
3.3 880 Remote Display Installation (Optional)
The Detcon Model 880 Remote Display enclosure is rated NEMA 4X, which is rain tight and suitable for
outdoor locations in electrically non-hazardous environments. The enclosure is equipped with four (4) wall-
mounting brackets for easy wall mount installations. Care should be given to prevent sharp objects from