Connecting The Power Cord; Power Input And Pgnd; Connecting The Ac Power Cord - 3Com MSR 50-40 ROUTER. Installation Manual

Figure 3-3 PGND screw of the router
Use a PGND cable to connect the screw to the earth ground, and the grounding resistance should not
be greater than 5-ohm. Likewise, if the router is installed in a 19-inch standard rack, this rack is required
to be grounded too.
When the router is in normal operation, it is required to be well grounded. Otherwise, the router cannot
reliably avoid lightning, which may damage the router itself and even the peer device.

Connecting the Power Cord

Based on power supply mode, the MSR 50-40 and MSR 50-60 each have two models: DC, AC. You can
choose suitable models as needed.

Power Input and PGND

Table 3-2 Power input and PGND of the MSR 50-40 and MSR 50-60 routers
Power input (AC-powered)
Power input (DC-powered)
PGND

Connecting the AC Power Cord

AC power supply
AC input range: 100 VAC to 240 VAC, 50 Hz to 60 Hz
The following figure illustrates the power socket and switch for an AC-powered router:
Item
Provide 100 VAC to 240 VAC power socket
Provide –60 VDC to –48 VDC power socket
Connected to the earth ground with ground cable
3-4
Description