Making Ground Connections; Making Alarm Connections; Tsg 3800E Main Shelf, Rear View - Symmetricom TSG-3800 Series User Manual

Figure 2-4.

TSG 3800E Main Shelf, Rear View

Making Ground Connections

After the TSG-3800 is installed in a rack, the shelf must be connected to a proper
earth ground.
1. Run a cable from the frame ground (FG) lug to earth ground.
Keep this cable as short as possible. Frame ground connections are made using
the #8-32 stud labeled FG on the lower left corner of the rear panel.
2. Using a digital voltmeter, measure between ground and chassis and verify that
no voltage potential exists between them.

Making Alarm Connections

To make alarm connections to the TSG-3800:
1. Locate the ALARM terminal block connectors labeled MAJOR ALARMS (TB1)
and MINOR ALARMS (TB2) on the rear panel, see
Figure 2-4.
Both terminals contain REMOTE, LOCAL, and AUDIO alarm connections. Three
contacts are provided for each alarm: normally closed (NC), normally open (NO),
and common (COM). Refer to
12778474-002-2 Revision F – March 2004
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Figure
Figure 2-5 for terminal screw assignments.
Installing the TSG-3800
Making Electrical Connections
2-2, Figure 2-3, and
TSG-3800 User's Guide 53