Siemens S7-400 installation manual Low-Voltage Protection Elements for 1

Assembling and Installing Systems

Low-Voltage Protection Elements for 1 <--> 2

For the transition points between lightning protection zones 1 <--> 2 we recommend the surge protection components listed in table A-4

Table A-4		Low-Voltage Protection Components for Lightning Protection Zones 1 <--> 2
Ser.		Cables for ...	... equip transition point 1 <-> 2 with:			Order No.
No.
1	3-phase TN-C system		3 pieces of	DEHNguard 275 surge arresters		900	600*
						5SD7 030
	3-phase TN-S system		4 pieces of	DEHNguard 275 surge arresters		900	600*
						5SD7 030
	3-phase TT system		3 pieces of	DEHNguard 275 surge arresters		900	600*
				phase L1/L2/L3 to N		5SD7 030
			1 piece of	DEHNgap C N-PE surge N to PE		900	131*
	AC TN-S system		2 pieces of	DEHNguard 275 surge arresters		900	600*
						5SD7 030
	AC TN-C system		1 piece of	DEHNguard 275 surge arresters		900	600*
						5SD7 030
	AC TT system		1 piece of	DEHNguard 275 surge arresters		900	600*
				phase L to N		5SD7 030
			1 piece of	DEHNgap C, N-PE surge		900	131*
				arrester, N to PE
2	24 VDC Power Supply		1 piece of	Blitzductor VT lightning		918	402*
				conductor, type AD 24 V
3	Bus cable
	•	MPI RS 485		• Blitzductor CT surge arrester,		919	506* and
					type MD/HF	919	570*
	•	RS 232 (V.24)	1 piece of	•	per conductor pair	919	506* and
					surge arrester Blitzductor CT
					type ME 15 V	919	522*
4	Inputs of digital modules 24		1 piece of	Low-voltage surge arrester,		919	993*
	VDC			type FDK 2 60 V
5	Outputs of digital modules 24		1 piece of	Low-voltage surge arrester		919	991*
	VDC			FDK 2D5 24
6	Inputs/outputs of digital		2 pieces of	Surge arresters
	modules
	•	120 VAC		•	DEHNguard 150	900	603*
	•	230 VAC		•	DEHNguard 275	900	600*
7	Inputs of analog modules up		1 piece of	Surge arrester		919	506* and
	to 12 V +/--			Blitzductor CT type MD 12 V		919	541*
* You can order these components directly at:				DEHN + SÖHNE
				GmbH + Co. KG
				Elektrotechnische Fabrik

Hans-Dehn-Str. 1

D-92318 Neumarkt

A-26	Automation System S7-400	Hardware and Installation
		A5E00850741-01