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Page 42 SC2000 Manual – 177/52301 Rev G 22

October

2004

STANDARD SEVCON POWER UP, SEAT SWITCH AND SRO SEQUENCING DESCRIPTION

KEY SWITCH POWER UP TRUTH TABLE (NO SRO ENABLED)

Key Sw. Seat Sw. Direction Sw. FS1 Sw. Drive Fault Indicated

1-8 0 x x x No None

9 1 0 0 0 No None

10 1 0 0 1 No None

11 1 0 1 0 No None

12 1 0 1 1 No

Seat Fault

13 1 1 0 0 No None

14 1 1 0 1 No None

15 1 1 1 0 No None

16 1 1 1 1

Yes

None

KEY SWITCH POWER UP SEQUENCE TABLE (NO SRO ENABLED)

1 Key Seat Direction FS1

Yes

None

2 Key Seat FS1 Direction

Yes

None

3 Key Direction Seat FS1 No

Seat Fault

4 Key Direction FS1 Seat No

Seat Fault

5 Key FS1 Seat Direction No

Seat Fault

6 Key FS1 Direction Seat No

Seat Fault

7 Seat Key Direction FS1

Yes

None

8 Seat Key FS1 Direction

Yes

None

9 Seat Direction Key FS1 No

Power Up Fault

10 Seat Direction FS1 Key No

Power Up Fault

11 Seat FS1 Key Direction No

Power Up Fault

12 Seat FS1 Direction Key No

Power Up Fault

13 Direction Key Seat FS1 No

Power Up Fault

14 Direction Key FS1 Seat No

Power Up Fault

15 Direction Seat Key FS1 No

Power Up Fault

16 Direction Seat FS1 Key No

Power Up Fault

17 Direction FS1 Key Seat No

Power Up Fault

18 Direction FS1 Seat Key No

Power Up Fault

19 FS1 Key Seat Direction No

Power Up Fault

20 FS1 Key Direction Seat No

Power Up Fault

21 FS1 Seat Key Direction No

Power Up Fault

22 FS1 Seat Direction Key No

Power Up Fault

23 FS1 Direction Key Seat No

Power Up Fault

24 FS1 Direction Seat Key No

Power Up Fault

SEAT SWITCH TRUTH TABLE (NO SRO ENABLED)

Seat Sw. Seat Timer Direction Sw. FS1 Sw. Drive Fault Indicated

1 0 0 0 0 No No

2 0 0 0 1 No No

3 0 0 1 0 No

Seat Fault

4 0 0 1 1 No

Seat Fault

5 0 1 0 0 No No

6 0 1 0 1 No No

7 0 1 1 0 No No

8 0 1 1 1

Yes

9 1 x 0 0 No No

10 1 x 0 1 No No

11 1 x 1 0 No No

12 1 x 1 1

Yes

13 1 x 0 0 No No

14 1 x 0 1 No No

15 1 x 1 0 No No

16 1 x 1 1

Yes

SEAT SWITCH SEQUENCE TABLE (NO SRO ENABLED)

1 Seat Direction FS1

Yes

2 Seat FS1 Direction

Yes

3 Direction Seat FS1 No

Seat Fault

4 Direction FS1 Seat No

Seat Fault

5 FS1 Seat Direction No

Seat Fault

6 FS1 Direction Seat No

Seat Fault

SRO (Static Return to Off) TRUTH TABLE

Direction Sw. FS1 Sw. Drive Fault Indicated

1 0 0 No None

2 0 1 No None

3 1 0 No None

4 1 1

Yes

None

SRO (Static Return to Off) SEQUENCE TABLE

1 Direction FS1

Yes

None

2 FS1 Direction within 2

seconds

Yes

None

3 FS1 Direction after 2

seconds

SRO FAULT

Brand	tech/Ops
Model	SEVCON SC2000 Series
Category	Controller
Language	English

tech/Ops SEVCON SC2000 Series User Manual

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tech/Ops SEVCON SC2000 Series Specifications