Dexing NDS3306I - 3.2.3 Grounding Requirements; 3.2.4 Frame Grounding; 3.2.5 Device Grounding; 3.3 Wire Connections

NDS3306I 6 in 1 ISDB-T Modulator User Manual
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3.2.3 Grounding Requirement
 All function modules’ good grounding is the basis of reliability and stability of devices.
Also, they are the most important guarantee of lightning arresting and interference
rejection. Therefore, the system must follow this rule.
 Coaxial cables’ outer conductor and isolation layer should keep proper electric
conducting with the metal housing of device.
Item
Requirement
Machine Hall Space
When user installs machine frame array in one machine hall, the
distance between 2 rows of machine frames should be 1.2~1.5m and
the distance against wall should be no less than 0.8m.
Machine Hall Floor
Electric Isolation, Dust Free
Volume resistivity of ground anti-static material: 1X10
7
~1X10
10
,
Grounding current limiting resistance: 1M (Floor bearing should be
greater than 450Kg/㎡)
Environment
Temperature
5~40℃(sustainable ), 0~45℃(short time)
installing air-conditioning is recommended
Relative Humidity
20%~80% sustainable 10%~90% short time
Pressure
86~105KPa
Door & Window
Installing rubber strip for sealing door-gaps and dual level glasses
for window
Wall
It can be covered with wallpaper, or brightness less paint.
Fire Protection
Fire alarm system and extinguisher
Power
Requiring device power, air-conditioning power and lighting power
are independent to each other. Device power requires AC power
220V ±10% 50/60Hz or 110V ±10% 50/60Hz. Please carefully
check before running.