2.5 Internal ESD Protection Circuits
RADWIN equipment is designed to meet the ETSI/FCC/Aus/NZ/CSA EMC and Safety
requirements. To fulfill these requirements, the system's Telecom lines at the ODU/PoE are
Transformer‐isolated and include internal ESD (Electro‐Static‐Discharge) Protection circuits.
When installing an AC powered HSU: To maintain Overvoltage (Installation) Category II,
install a suitable surge suppressor device in the branch circuit to limit expected transients to
Overvoltage Category II values.
The limits are based on IEC60664 and are also located in UL60950 Table 2H (for mains <=
150V, the transient rating is 1500V; for 150V < mains <= 300V, the transient rating is 2500V;
and for 300V < mains <= 600V, the transient rating is 4000V).
2.6 High Voltage
When working with the Alpha Connectorized ODU:
Possibility of hazardous voltage 56VDC appearance exists on accessible antenna
connections. Use Personal Protection Equipment (e.g. insulating gloves) when working
with the ODU or the antenna. Connect the shield of the antenna coaxial cable to the
protective earth when coaxial cable is used.
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