Specifications

AS-Interface
Slaves
Modules with special functions
Overvoltage protection modules
2/51
Siemens LV 1 · 2007
2
Configuration guidelines
Configuration guidelines for overvoltage protection modules
The grounding of protection modules and the units to be pro-
tected must be effected through a shared grounding point
(equipotential bonding). If insulated devices are protected, their
mounts must be included in the grounding points.
Sample application
Sample application for overvoltage protection modules
■ Selection and ordering data
AS-
Inter-
face
AS-
Inter-
face
NSA0_00093a
OVP = Overvoltage protection
Mounting plate
Application
Device with
ground terminal
Device without ground terminal
→ Grounding of the mounting plate
Application
OVP
NSA0_00092a
AS-
Inter-
face
AB
AS-
Inter-
face
AS-
Inter-
face
AS-
Inter-
face
OVP = Overvoltage protection
OVPOVP
protected range
Zone 1 Zone 1Zone 2
Protection approx. 5m to the right
Equipotential bonding
(system earth)
Protection approx. 0.5m to the left
Version DT Order No. Price
per PU
PU
(UNIT,
SET, M)
PS* PG Weight
per PU
approx.
kg
3RK1 901-1GA00
Overvoltage protection modules B
3RK1 901-1GA00 1 1 unit 121 0.146
* You can order this quantity or a multiple thereof.
© Siemens AG 2007