DSB51XXS CARLO GAVAZZI Selected parameters MONITORED VARIABLE Surge protection Others




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Selected parameters MONITORED VARIABLE Surge protection Others

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Energy Meters Control Analizers


Monitoring Relays and Measurement Current Transformers

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Monitoring Relays
Surge Arresters forcommunication systems
Type DSB S
• Universal surge arrester for 2-wires communication buses
• Perfect choice for RS485 and RS serial lines
• Dual technology with GDT and tranzorb
• DIN-rail mounting
• Replaceable plug in module
Product Description Ordering Key
DSB 51 X X S
DSB51XXS is a surge pro- tectingdevicethathas been specifically designed for 2 and 4 wires communi- cation buses at 5V (eg. RS485, RS422 (with 2 devices) and ModbusRTU
), measuring,controlling andregulating devices used in industrialand resi- dential environments. It can also be used for pro- tecting from overvoltages
Type Selection
devices such as inverters, energy meters, interface protections (coupling devices), control and acquisitions systems in photovoltaic installations thatare interconnected by means of serial communi- cationlines. The construc- tion isDINrailmounting and the cartridge is replaceable.
Mounting din Surge Arrester Type
Item number Output Network Serial
Code DescriptionNominal voltage of the system
Output relayCartridge
DSB51XXS Surge arrester for 2-wire communication bus5V NoYes
General Specifications
Nominal operating voltageUn
Max. continuous oper. voltage Uc
Rated spark over voltage
(a-b), (a, b-SG)6-8V
Nominal discharge current In
(8/20usec) 10kA
Max discharge currentImax
(8/20usec) 20kA
Rate operating current @ 25°C IL
Transverse capacitanceC
(a, b-SG) 50pF
Insultation resistance of the protection
(a-b) ≥5kohm/
Series resistance 1.6ohm ÷ 2ohm Protection distance 10 m (suggested value) Coarse protection3 terminal GDT
Mode of protectionLongitudinal, Transverse
Operating temperature-40 to +80 °C
Protection degreeIP 20
Residual voltage @ 5kA
(8/20usec) <22V (line-line)
Response time
of overload protectionta
(a, b-SG) <1ns
Limit frequency30MHz
Housing materialThermoplastic gray
extinguishing degree V-O
Terminal cross sectionMulti-strand to 4mm2
Mounting EN 60715 On a 35mm DIN rail
Design Replaceable plug-in module
DimensionsH90 x L12 x P71.5mm
CE Marking Yes
Specifications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network. REV0 120214 1

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