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13.2 Time Out Setting For Automatic Evacuation Sequence
The selection of the time can be achieved either before or after the power up sequence.
The time base is ten (10) seconds, i.e. the minimum time out possible is 10 seconds to a maximum of
10 minutes in 10 second increments. An eight position DIL switch located on the rear of the 302-4220
main CPU Board (refer Figure 27) is provided to select the required time out.
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SETTING THE TIME OUT
The total time out is calculated by adding the count of the switches that are " ON " as shown below,
PLUS one (1) and then multiplying this total by the base time. The base time is usually ten seconds
unless stated otherwise.
COUNT
SWITCH
NUMBERS
Example: Switches numbered 2 + 3 are ON, all others are OFF
The count for the Timeout is therefore = (2 + 4 + 1) x 10 = 70 seconds
Switch 7 (if ON) halts evacuation sequences when the key switch is in the Manual position. See section
8.1.2 for further detail.
Switch 8 (if ON) enables monitoring of the EIS and EWS audio bus. See section 10.3 for further detail.
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+
Figure 29: Switch settings
1 2 4 8 16 32
O N
O N
1 2 3 4 5 6 7 8
Figure 30: Switch Settings
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1
2
3
4
5
6
7
8
9
10
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12
13
14
15
MEMORY
16
EXPANSION
17
MODULE
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
RESET
API-422-C
SWITCHES 7 & 8
ARE NOT USED
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SW5 DO
NOT
TOUCH
TIME OUT
SELECTION
SWITCH
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