WIDE AREA MODULE (WAM)

WAM/SWITCH 1

LINK EQUIPMENT

LINK EQUIPMENT

WAM/SWITCH 2

TXS+ (MA2)

EA

EA

TXS+ (MA2)

TXS- (MB2)

EB

EB

TXS- (MB2)

MA

 

 

MA

 

 

 

MB

 

 

MB

 

 

 

EA

MA

MA

EA

 

 

 

EB

MB

MB

EB

 

 

 

 

LOCATION 1

 

LOCATION 2

Figure 19-4 WAM E&M LEAD CABLE LAYOUT 2 LOCATIONS

19.4.1 ONE LOCATION

When only one WAM is used no E&M Lead external connections are necessary.

19.4.2 TWO LOCATIONS

Cross-connecting between the Switches/Links requires the use of the additional WAM M-Lead output (see Figure 19-4).

19.4.3 THREE LOCATIONS

A WAC that consists of three or more Locations with Switches/WAMs at each requires the use of the M-Lead Splitter Box (see Section 19-5). The Splitter Box splits one M-Lead input into six M-Lead outputs. Seven boxes would allow a total of seven Locations with Switches/WAMs at each to participate in a WAC before needing a second box per Location (see Figure 19-6).

NOTE: The M-Lead Splitter Boxes are needed only at the Locations where two or more E&M Links connect to WAMs. Notice in Figure 19-3that the M-Lead Splitter Box is not needed since there is only one E&M Link interface.

19.5 M-LEAD SPLITTER BOX

19.5.1 GENERAL

The M-Lead Splitter Box Kit (PN 250-3239-300) is to be used with WAMs that allow Wide Area Calls (WAC) over links that utilize 4-Wire E&M Lead circuits. The M-Lead Splitter Box (PN 023-3239-300) provides up to six M-Lead outputs with one M-Lead input.

19.5.2 INSTALLATION

The box is powered by +12V on pin 1. The +12V supply can be obtained from the Switch Bus Bar. The spades of the cable (PN 023-3239-320) in the kit are connected to the bus bar (Red to +12V, Black to ground) and the stripped ends of the cables are connected to the terminal block of the M-Lead Splitter Box (Red to pin 1, Black to pin 2), see Figure 19-5.

A maximum of 10 boxes may be powered by one cable by daisy-chaining the rest of the power inputs.

Refer to System Configuration diagrams or Figure 19-6for the usage of the M-Lead I/Os.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

17

16

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14

13

12

11

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9

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2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N

C

N

 

C

 

 

 

 

 

 

M

B

 

 

 

 

 

O

U

T

 

O

U

T

 

 

O

U

T

 

O

U

T

 

 

O

U

T

 

 

O

U

T

 

O

U

T

 

 

O

U

T

 

O

U

T

 

 

O

U

T

 

 

O

U

T

 

O

U

T

 

B

I

N

 

A

I

N

 

 

U

N

D

1

2

V

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

1

 

1

 

M

 

M

 

 

O

 

 

 

 

6

 

 

 

5

 

 

5

 

 

 

4

 

 

 

4

 

 

3

 

 

 

3

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M

A

 

M

 

B

 

M

A

 

M

 

B

 

M

 

A

 

M

B

 

M

 

A

 

M

B

 

M

 

A

 

M

 

B

 

M

A

 

 

 

 

 

 

 

G

 

R

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 19-5 M-LEAD SPLITTER BOX I/Os

19-5