Processor

The processor has four predrilled mounting holes and

maintain the color dot relationship

the two conduit hole locations are marked and identified

between the transducers an(l the plastic

by a center punched indent on the top outer side. Each

support.

transceiver has six mounting hole locations, two are

marked and identified by center punched indents on

(1) Remove and retain the four 4 x inch

each mounting plane (only two of the six mounting holes

long sheet metal screws fastening the cover to the

will be drilled).

Each transceiver is marked and

enclosure.

identified by center punched indents for two conduit

(2)

Remove the receive and transmit

entrance holes at each end of the enclosure. No more

transducers (blue and red respectively) leads from the

than two conduit entrance holes will be used. When two

pc board.

are required they must be at the same end of the

(3) Remove the black chassis ground lead

enclosure and the conduit entry must be adjacent to the

from the pc board.

transmit transducer. Not all enclosures will require two

(4) Remove and retain three 4 x inch

conduit entrance holes; this depends on the connection

long sheet metal screws fastening the pc board to the

method (fig. 2-3). Determine which enclosures require

transducer plastic supports. Remove pc board.

two conduit entrance holes and those that require only

(5) Remove and retain eight 4 x inch

one conduit entrance and which one of the two marked

long sheet metal screws fastening two plastic transducer

holes are to be used.

supports to the enclosure. Each support is fastened to

the enclosure with two screws through the back of the

a. Processor, (Fig. 1-1). Prior to drilling holes in

enclosure and two screws (one on each side) through

the processor enclosure, temporarily remove the printed

the sides of the enclosure.

circuit board to prevent accidental damage to it. Do not

reinstall the printed circuit board until the enclosure is

CAUTION

permanently secured to the mounting surfaces, all the

conduit is permanently attached to the enclosures, and

Do not remove leads from the

the cables have been run through the conduit.

transducers. The lead length and the

(1) Remove and retain the two 6-32 x 3/8

painted color dots are the identifying

inch long screws fastening the cover to the enclosure

features of the receive and transmit

(fig. C-1).

transducers. Do not apply any pressure

(2) Remove and retain the seven 6-32 x 3/8

to the transducer face.

inch long screws fastening the pc board to the enclosure

interior (fig. C-1).

(6)

Using a 9/32 inch drill, drill two

(3) Using a number 18 drill, drill one or two

mounting holes through the appropriate mounting

(as determined by the interconnection configuration)

surface (20 45 or 90 plane) of the enclosure at the

pilot holes through the enclosure at the centerpunched

centerpunched locations and one or two (as determined

conduit entrance locations.

by the interconnection configuration) pilot holes through

(4) Using a 3/8 inch diameter drill, enlarge

the enclosure at the centerpuncher conduit entrance

the pilot hole(s) at the conduit entrance locations.

locations. If two conduit entrances are required, both

(5) Using a 7/8 inch hole punch enlarge the

must be at the same end of the enclosure.

3/8 inch diameter hole. To facilitate the hole punch

(7) Using a 3/8 inch diameter drill, enlarge

operation, lubricate the drive screw threads and the

the pilot hole(s) at the conduit entrance locations.

screw/die bearing surfaces.

(8) Using a 7/8 inch hole punch enlarge the

(6) Deburr all the holes and remove all

3/8 inch diameter hole. To facilitate the hole punch

metal chips from the enclosure interior.

operation, lubricate the drive screw threads and the

screw/die bearing surfaces.

b. Transceiver (fig. C-3). Prior to drilling holes in

(9) Deburr all the holes and remove all

the transceiver enclosure, temporarily remove the pc

metal chips from the enclosure interior.

board and the two transducers and supports as a unit to

prevent accidental damage to them.

2-15. Mounting Surfaces

NOTE

Securing the transceivers and processor enclosures to

various types of mounting surfaces such as wood, metal

The receive and transmit transducers

or masonary requires some ingenuity on the part of the

appear identical with the exception of a

installer. Installations are not limited to the various

blue dot on the receive transducer and

suggested methods of approach that follow.

its associated plastic support and a

white dot on the transmit transducer

Wood.

This type of mounting material

and its associated plastic support A

presents the least difficulty. Position the enclosure in

second difference is in the length of

place, considering adjacent approaches for ease in

connector leads between the transducer

interconnections. Using the enclosure mounting holes

and the pc board. The lead attaching to

as a template, mark the mounting surface. Remove the

the receive transducer is 3 inches long

enclosure and drill two or four pilot holes (smaller than

and the lead attaching to the transmit

the number 12 wood screws) in the mounting material.

transducer is 8 inches long. Always

2-8