Siemens SIMATIC NET RUGGEDCOM RMC40 Installation Manual page 21

Installing the Device
2.4.2 Connecting DC Power
connects transient suppression circuitry to chassis ground and must be removed to
avoid damage to transient suppression circuitry during testing.
1.
2.
3.
4.
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Connect the positive wire from the power source to the positive/live (+/L)
terminal on the terminal block.
1 2 3
Positive/Live (+/L) Terminal
1
Negative/Neutral (-/N) Terminal
2
Surge Ground Terminal
3
Braided Ground Cable
4
Figure 2.5 Terminal Block Wiring
Connect the negative wire from the power source to the negative/neutral (-/N)
terminal on the terminal block.
Using a braided wire or other appropriate grounding wire, connect the surge
ground terminal to the chassis ground connection. The surge ground terminal
is used as the ground conductor for all surge and transient suppression circuitry
internal to the unit.
Connect the ground terminal on the power source to the chassis ground
terminal on the device.
4
Installation Manual, 11/2022, C79000-G8976-1009-10
RUGGEDCOM RMC40