TelcoBridges 3200 Series Gateway 1+1, Руководство по установке

Страница: 28 / 68

3200 Series Standalone and 3200 Series 1+1 System Installation Guide
22
2.4.4 Grounding the Equipment Chassis
As a standard safety practice, the chassis of the 3200 series gateway 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 3200 series gateway is installed in an equipment rack, connect
the ground wire between the ground lug of the gateway and the equipment rack ground bar. If more
than one 3200 series gateway is installed in an equipment rack, each 3200 series gateway 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 2.7
on page 22.
• Do not over tighten ground lug connections.
To connect to the 3200 series gateway to ground:
1. Connect one end of a ground wire to the ground lug of the 3200 series gateway (AC or DC model).
See Figure
2.7 on page 22.
2. Connect the other end of the ground wire to a ground bar of the equipment rack. If the 3200 series
gateway 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 2.7 Chassis Ground Connection
MGMT0
ETH VOIP
0 1 0 1
TMS
0 1
Gro u nd Bar
MGMT0
ETH VOIP
0 1 0 1
TMS
0 1
Earth
Gro
u nd
D C Unit
Earth
Gro
u nd
A C Unit
(or)
+
-
---
+
-
---