Symmetricom 1000, 1100 manual Making Power Connections, Expansion Panel

Chapter 3 Installing the TimeProvider

Making Connections

Expansion Panel

All connections to the Expansion Panel, including chassis ground, are made using the interconnection cable.

Making Power Connections

Electrical Shock Caution: To avoid possible injury from shock, make sure that the fuses are removed from the fuse panel or power supply before connecting or applying power to the unit.

Warning: For continued fire protection, replace power supply fuse(s) with the specified type and a 5 A rating. There are no user-serviceable fuses in the TimeProvider shelf.

This unit must be grounded.

Refer all servicing to qualified personnel.

To install the TimeProvider power connections:

1.Assemble a power connector appropriate for the type of shelf. Table 3-1lists the pin-out for each type of connector.

Rear-access shelf: Crimp a No. 16 AWG (minimum) wire (1.31 mm2) to a spade lug, then slide the spade lug under the terminal and tighten.

Front-access shelf: Assemble the power connector as shown in Figure 3-6. Solder a No. 16 AWG (1.31 mm2) (minimum) wire to each pin. Slip the appropriate grommet over the wires, and screw the shell together.

2.Attach the connector to the Power A and Power B connectors on the shelf.

Table 3-1. Power Connections
	Model 1100 Rear Access (NEBS) Shelf			Model 1000 Front Access (ETSI) Shelf
	Signal	Terminal		Signal	Terminal
48	Volt Negative Lead	1	Frame Ground		1
48	Volt Positive Lead (return)	2	48	Volt Negative Lead	2
			48	Volt Positive Lead (return)	3

097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 61