Siemens SIMATIC S7-400 Hardware And Installation Manual page 260

Assembling and Installing Systems
Table A-3 Low-Voltage Protection for Cables Using Surge Protection Components
Consecu- Connect Cables for ...
tive No.
1 3-phase TN-C system
3-phase TN-S and TT system
AC TN-L, TN-S, TT system
2 24 VDC supply
3 Bus cable
MPI, RS 485
RS 232 (V.24)
4 Inputs and Outputs of Digital
Modules
and Power Supply Modules
24 VDC
120 V/230 VAC
5 Inputs and Outputs of Analog
Modules
up to 12 VDC **
up to 24 VDC **
up to 48 VDC **
up to 120 VAC **
* You can order these components directly from
DEHN + SÖHNE
** Signal voltage plus Common Mode Voltage
A-20
www.gkbpx.com
... connect the following to the in-
terface greater than 1 <-> 2:
3 pcs. Overvoltage down conductor
DEHN guard 275
4 pcs. Overvoltage down conductor
DEHN guard 275
2 pcs. Overvoltage down conductor
DEHN guard 275
1 KT lightning conductor type
A D 24 V
up to 500 Kbps
1 KT lightning conductor
Type ARE 8 V -
over 500 Kbps
1 KT lightning conductor
Type AHFD 5 V -
per core pair
1 KT lightning conductor
Type ARE 15 V -
1 KT lightning conductor
Type AD 24 V -
2 pcs. Overvoltage down conductor
DEHN guard 150
1 Overvoltage protection
modular terminal
Type FDK 12 V
1 Overvoltage protection
modular terminal
Type FDK 24 V
1 Overvoltage protection
modular terminal
Type FDK 60 V
1 KT lightning conductor
Type ALE 110 V -/
GmbH + Co. KG
Elektrotechnische Fabrik
Hans-Dehn-Str. 1
D-92318 Neumarkt
S7-400 and M7-400 Programmable Controllers, Installation Manual
Order Number
900 600*
900 600*
900 600*
DSN: 919 253
DSN: 919 232
DSN: 919 270
DSN: 919 231
DSN: 919 253
900 603*
DSN: 919 999
DSN: 919 998
DSN: 919 997
DSN: 919 224
C79000-G7076-C424-01