097-93100-01 Revision C – February, 2010 TimeCreator 1000 User’s Guide 57
Chapter 3 Installing the TimeCreator 1000
Making Ground and Power Connections
Making Ground and Power Connections
The TimeCreator 1000 has the option of using either 120/220 V AC, or –48 V DC
power. For non-redundant operation, install either one AC module or one DC
module. For redundant operation, install either two AC modules, two DC modules,
or one AC and one DC module (see Figure 3-6).
Ground Connections
After installing the TimeCreator 1000 into the rack, connect the shelf to the proper
grounding zone or master ground bar. The grounding lug is a screw on the side of
the unit, near the back. Using a ring terminal on the 12 AWG wire, connect the
ground lug to permanent earth ground
Power Connections
Install the appropriate power module and make the power connections as follows:
DC Power
1. Ensure the power source is turned off.
2. Connect the frame ground terminal to earth ground.
3. Locate power terminals on the –48 V DC Power Module.
4. Using 16 AWG (minimum) stranded wire, connect primary power to the terminal
screws. Symmetricom recommends that you use a #6 spade lug termination for
each power lead.
Recommendation: Although there are a number of methods for
connecting the equipment to earth ground, Symmetricom
recommends running a cable of the shortest possible length from the
ground lug to earth ground.
Warning: To avoid possible damage to equipment, you must provide
power source protective fusing as part of the installation.
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