3-5
Power Input and PGND
Table 3-2
Power input and PGND of the MSR 20-20/20-21/20-40 router
Item
Description
Power input
100 VAC to 240 VAC power input socket
PGND
Connected to the earth ground with ground cable
Connecting the AC-input Power Cord
AC power supply
Rated voltage range: 100 VAC to 240 VAC, 50 Hz/60 Hz
The following figure illustrates the partial external appearance of the power socket for an AC-powered
router:
Figure 3-5
Power socket on AC-powered units
(1)
(2)
(1) Power switch
(2) AC input
AC power socket (recommended)
You are recommended to use a three-terminal single-phase power socket with ground contact, which
must be grounded reliably. Normally, the ground contact of the power supply system in a building was
buried during construction and cabling. Still, before connecting the AC-input power cord, you must
make sure that the power supply of the building is well grounded.
Connecting the AC-input power cord
Step 1: Make sure that the PGND is securely connected to the earth ground.
Step 2: When the power switch of the router is in the OFF position, insert one end of the power cord
accompanying the router into the power socket on the chassis rear panel, and connect the other end of
the cable to an AC power source at your installation site.
Step 3: Place the power switch of the router to the ON position.
Step 4: Check that the PWR LED on the front panel of the router is on for correct connection.
Connecting the Console Terminal
Console port
MSR 20 series provides an RS232 asynchronous serial console (CON) port for router configuration,
through which you can complete the configuration of the router. For its attributes, refer to Table 3-3:
