RFL 9780 RFL Electronics Inc.
March 10, 2000 3-4 (973) 334-3100
3.5 CONNECTIONS
Electrical connections are made to each RFL 9780 chassis through the terminal blocks and connectors
on the chassis rear panel. A rear panel view of a typical RFL 9780 Tx/Rx terminal is shown in Figure 3-
2. Refer to this figure when making connections. Paragraphs 3.5.1 through 3.5.9 provide basic
descriptions of all the connections that must be made. Refer to the "as supplied" drawings furnished
with your RFL 9780 for more detailed descriptions of the connections that must be made to your
system.
3.5.1 MAKING CONNECTIONS TO TERMINAL BLOCKS
NOTE
Before making connections to terminal blocks, check the configuration of all rear panel
modules in accordance with Table 4-2 as applicable. It is easier to configure the rear panel
modules prior to connecting field wiring. The configuration of these modules usually requires
the setting of programmable jumpers and DIP switches.
The terminal blocks on the rear of the RFL 9780 chassis are conventional screw-type barrier blocks.
Wires can either be stripped or terminated in spade lugs, depending on local practice. To connect wires
to the terminal blocks, proceed as follows:
1. Remove the transparent protective cover from the rear of the chassis by loosening the mounting
screws and sliding the panel up and off of the standoffs holding it in place.
2. Using strippers, remove about 1/4 inch (10 cm) of insulation from the end of the wire to be
connected.
3. If local practice calls for lugged wires, crimp a spade lug onto the stripped end of the wire.
4. Use the marking on the protective cover to help locate the terminal to which the wire is to be
connected.
All terminals blocks are numbered. Terminal numbers appear on the rear panel,
on the right or left side of each terminal block. Terminal block numbers are located
directly above each terminal block.
5. Using a screwdriver, turn the screw at that position counterclockwise until the wire or lug can
be slipped underneath the screw head.
6. If the wire is lugged, slip the lug under the screw head. If lugs are not being used, use a pair of
needle-nose pliers to bend the stripped end of the wire into a hook, and slip this hook under the
screw head so that the hook surrounds the screw.
7. Using a screwdriver, turn the screw clockwise until tight to secure the wire in place.
8. Repeat steps 2 through 8 for all other wires to be connected.
9. Line up the mounting holes in the rear panel protective cover with the standoffs on the rear of
the chassis, and push in and down on the protective cover until it is secured in place. Then
tighten the mounting screws.
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