VOTER DIAGNOSTICS MODULE (VDM)

Table 15-1 VDM SWITCH SETTINGS

Switch

 

Open Sections

 

Close Sections

 

 

 

 

Digital

CommunicationUsing Secondary

 

 

 

 

Lines.

 

 

 

 

 

 

 

 

 

 

 

 

 

S1

1

2

-

4

-

-

3

-

S3

1

2

-

-

-

-

3

4

S4

-

-

3

4

1

2

-

-

S5

-

-

-

-

1

2

3

4

 

 

 

 

 

 

 

 

 

15.2.2 JUMPER PLACEMENT

Table 15-2 VDM BOARD JUMPER

PLACEMENT

JU

Pin

Description

 

 

 

J24

1 to 2

Selects 27512 EPROM operation

 

2 to 3*

Selects 27256 EPROM operation

J27

1 to 2

Not Used

 

2 to 3*

Normal Operation

P33

1 to 2*

No personality card attached

 

3 to 4*

No personality card attached

 

5

open

 

6

open

J36

1 only*

Not used

 

1 to 2

-48V E-lead operation

 

2 to 3

-15V E-lead operation

J14

Jumper pin 1 to 2 for high impedance ground path

J15

for split 600 ohm inputs and outputs. Leave open if

J21

no ground path desired.

J22

 

 

*Setting for Normal operation.

15.2.3VDM BACKPLANE EXTERNAL CONTACTS

See the Backplane Section 23 for pinouts on the shelf backplane and wire harness pinouts.

Table 15-3 BACKPLANE PINOUTS

Backplane

Description

Wire Harness

P34 to P45

 

J1,3,5,7

 

 

 

 

 

 

pin 27

Sec Rx +

pin 1

Signal

pin 28

Sec Rx -

pin 2

Ground

pin 29

EA lead

pin 3

 

pin 30

EB lead

pin 4

 

pin 31

Pri Rx Audio+

pin 5

 

pin 32

Pri Rx Audio-

pin 6

 

 

 

 

J2,4,6,8

 

 

 

 

pin 59

Sec Tx +

Signal

pin 1

pin 60

Sec Tx -

Ground

pin 2

pin 61

MA lead

 

pin 3

pin 62

MB lead

 

pin 4

pin 63

Pri Tx Audio+

 

pin 5

pin 64

Pri Tx Audio-

 

pin 6

15.3 VDM ALIGNMENT SPECIFICATIONS

No alignment is required for the VDM. The setup procedures are to make the proper switch settings and connections.

Figure 15-2 VDM I/O CONNECTIONS

15-2