February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930 Page 103
7.2 EMC Testing
The DCS sensor has been tested at an accredited test laboratory to verify that the sensor fulfils the requirements in the
EU EMC directive (89/336/EMC).
Applied standards
• EN55011 (2009)+A1
• EN 61326-1 (2013)
Applied tests
• Conducted Emissions
• Electrostatic Discharge Immunity
• Surge Immunity
• Conducted RF Disturbance Immunity
Other tests were found as not relevant to this sensor due to underwater use and DC power.
7.3 Cables
Different cables are available for stand-alone use with free end and connectors. The cables have both power and signal
lines (RS-232/RS-422). Contact factory for more information on cables that is best suited for use in the actual
application. When delivered, system drawings/cable drawings give details on parts connection and installation overview
with best EMC performance (best noise and surge immunity).
In underwater and buoy systems the sensors are delivered with a common mode line filter to be used on the power
lines. This is necessary to remove any present common mode noise frequencies in the Doppler frequency range.
In systems with cable to land the sensor is delivered with a Filter Protection box. This box has a common mode noise
filter and surge protection on power lines and signal lines.
7.4 Power – Voltage range
The input voltage range is from 6 to 30Vdc. When using long cables the voltage should be as close to 30V as possible.
The peak current while the sensor is pinging (after power on) is normally well below 1A (normally below 0.5A), but it
varies dependent on how high the input voltage is and how large the voltage drop is in the cable (lower voltage on the
sensor gives higher peak current).
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