Siemens RUGGEDCOM M969, Installation Manual

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Chapter 2
Installing the Device
RUGGEDCOM M969
Installation Guide
12 Disabling Line-to-Ground Transient Protection
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Figure 9: DC and DC Power Supply Wiring Example
1. M23 Power Connector 2. Ground Bus 3. 300 VDC Breaker 4. DC Power Source (PS2) 5. DC Power Source (PS1)
Section 2.2.3
Disabling Line-to-Ground Transient Protection
All line-to-ground transient energy is shunted to the Surge Ground terminal. In cases where users require the
inputs to be isolated from ground, remove the ground braid between Surge and Chassis Ground. All line-to-
ground transient protection circuitry will be disabled.
Figure 10: Surge Ground/Chassis Ground Connection