The Complete RS-485 Profibus EMI & ESD Solution

Ready to implement!

The RS-485 EMC and ESD solution can be easily integrated into designs. We have prepared a design bag (829 485) containing the necessary parts to implement a filter for RS-485 Profibus applications. Additionally, PCB layout files (Gerber) can be found below with the following download-link.

Learn more about adapter PCB`s for filtering electromagnetic interference on an RS-485 interface in our Application Note ANP083

Design Bag BOM

Function	Index	Description	Product Series	Order Code
Data Line	L1	Common Mode Line Filter ZMAX = 6000 Ω; VR(AC) = 50 V	WE-SL2	744 222
Data Line	RV1; RV2	ESD Suppressor VDC = 5 V ; ILEAK = 1 µA; VCLAMP,typ = 55 V	WE-VE	823 570 505 60
Data Line	C1; C2; C3	Multilayer Ceramic Chip Capacitor C = 100 pF; VR(DC) = 10 V; NP0	WCAP-CSGP	885 012 005 013
Power Line	C4; C5	Multilayer Ceramic Chip Capacitor C = 1µF pF; VR(DC) = 6.3 V; X5R	WCAP-CSGP	885 012 105 006
Power Line	L2	SMD-Ferrit Z @ 100 MHz = 1500 Ω; IR = 500 mA	WE-TMSB	742 692 41152
Connector	CON1	D-SUB Female PCB Connector - 8.08 mm	WR-DSUB	618 009 231 121
Connector	CON2	D-SUB Male PCB Connector - 8.08 mm	WR-DSUB	618 009 231 221

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WE-D-SUB Filter

• Standard type filtered with 1000 pF

• High attenuation: max. ≥ 40 dB @ 180 MHz

• Choice of earthing metal sheet or high speed earthing clip

• Rated voltage: 100 VDC

• Rated current @ 20 ºC: 5 A

• Withstand voltage: 250 VRMS

• Insulation resistance: min. 1000 MΩ

• Operating temperature: –55 ºC to +125 ºC

ESD Protection Design Kit

• Small size

• Low clamping voltage

• fast response time

• Bidirectional protection

• Low leakage current

• ESD protection >8 kV

• Order Code: 823 999

Design your EMC filter

• Test-PCBs offer an easy way to build up a line filter

• Common mode chokes suppress common mode noise

• X-Capacitors short differential mode noise to neutral

• Y-Capacitors short common mode noise to ground

• Resistor discharges X-Capacitors

• Brochure provides general information about filtering

• Order Code: 744998