TelcoBridges TSBC3000, Руководство по установке

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17
Installing the Equipment
2.4.4 Grounding the Equipment Chassis
As a standard safety practice, the chassis of the TSBC3000 series must be properly grounded to
protect against any contact with an electrical fault condition. It is recommended that the chassis be
connected to an earth ground. When the TSBC3000 series is installed in an equipment rack, connect
the ground wire between the ground lug of the session border controller and the equipment rack ground
bar. If more than one TSBC3000 series is installed in an equipment rack, each TSBC3000 series must
be grounded directly to the equipment rack ground bar.
Guidelines
• Use 10 AWG (minimum) stranded ground wire.
• Terminate equipment side of ground wire with a #10 ring terminal.
• Keep the length of the ground wire as short as possible.
• Do NOT daisy chain the ground between equipment. Use a ground bus bar, as show in figure 2.5
on page 17.
• Do not over tighten ground lug connections.
To connect the TSBC3000 series to ground:
1. Connect one end of a ground wire to the ground lug of the TSBC3000 series. See figure 2.5 on
page 17.
2. Connect the other end of the ground wire to a ground bar of the equipment rack. If the TSBC3000
series is not installed in an equipment rack, connect the ground wire to earth ground. In the case of
DC powered units, connect an additional ground wire from the chassis ground terminal of each DC
supply.
3. Verify that the resistance of the ground path is less than 0.5 ohms.
Figure 2.5 Ground Connection
AC Unit
(or)
15 14 13 12
10 11 8 9 3 2 0
7 6 5 4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1
Ground Bar
Earth
Ground
+
-
---
+
-
--
DC Unit
-
15 14 13 12
10 11
8 9 3 2 0
7 6 5 4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1
Ground Bar
Earth
Ground