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OnSite System Installation 33
OnSite Series Getting Started Guide 3 • Installation Overview
Installing the Chassis Ground Connection
The OS-10 system chassis requires a reliable earth ground connection. You must connect the chassis to a reli-
able earth ground. The ground wire must be installed in accordance with local electrical safety standards.
To connect the OS-10 system chassis to a reliable earth ground, follow these steps:
1. Strip one end of the ground wire to the length required for the ground lug or terminal.
Note For the NEBS ground lug, the length is approximately 0.75 inches
(20 mm)
Note For a user-provided ring terminal—as required
2. Crimp the ground wire to the ground lug or ring terminal, using a crimp tool of the appropriate size.
3. Attach the ground lug or ring terminal to the chassis grounding terminal location shown in Figure 3.
4. Connect the other end of the ground wire to a suitable grounding point at your site.
After installation and proper grounding of the OS-10 chassis, you can connect the following:
• Power wiring
• Cables for the fiber-optic interface and Category 5 cables for E1 and Ethernet client signal interfaces
• Category 5 cables for the Ethernet LAN and SERIAL management ports
Connecting Power to the OS-10 System
The system supports AC and DC power options, as listed in Table 7. These options are factory installed.
Note Both AC and DC options provide short-circuit and over-voltage pro-
tection.
Note The DC option provides reverse input polarity protection.
Table 6. Ground Wire Specifications
Grounding Standard Wire
EN/IEC 60950 AWG 18 (1 mm2) or larger wire and an
appropriate user-supplied ring terminal
NEBS AWG 6 (13 mm2) wire and the ground
lug provided in the accessory kit
NEC (National Electric Code) AWG 14 (2 mm2) or larger wire and an
appropriate user-supplied ring terminal
Table 7. OS-10 Power Options
Power Options Nominal Input Tolerance Limit Feature
AC 110 VAC at 50 Hz and
220 VAC at 60 Hz
100 to 245 VAC Auto-switching AC to DC power converter
DC –48VDC –36 to –72 VAC Auto-switching AC to DC power converter