ca3228 Harris Corporation, ca3228 Datasheet - Page 5

• Manufacturer Part Number: ca3228
• Description: Speed Control System With Memory
• Manufacturer: Harris Corporation

VAC (Pin 22)
VENT (Pin 21)
GATE (pin 23)
SET/ACCEL
RESUME
(SEE FIGURE 2)
COAST
CA3228E
OFF
ON
0.22 F
V
FIGURE 3. SOLENOID DRIVERS AND SERVO VACUUM CONTROL MECHANISM TYPICAL APPLICATION
3
ON
ALL RESISTANCE VALUES ARE IN OHMS
R3, 2.2K
R4,680
R5, 120
V
CC
VENT
GATE
ACCEL
VAC
H
H
L
1.2K
MOMENTARY
CONTACT
DRIVER
COMMAND
SWITCHES
S1
S2
S3
S4
S5
S
SPEED INPUT
FREQUENCY, f
2.22 Hz/MPH
4.7K
+8.2V
1.2K
FIGURE 2. TYPICAL AUTOMOTIVE SPEED CONTROL APPLICATION
N
CRUISE
H
L
L
620
0.5W
S
T.P.B.
T.P.A.
VOLT.
REG
8.2K
0.05 F
COAST
AIR
POSITON
FEED BACK
(OPTIONAL
TO PIN 20)
TO
L
L
L
N.O.
10K
560
R2
RI
SOLENOID
VALVE
V
VENT
TO THROTTLE
VENT
CC
150K
2.2 F
10K
BRAKE
10K
+14.4V
CA3228
H
L
L
VALVE
10-35
0.68 F
0.047 F
VAC
0.001 F
43K
0.1 F
VACUUM
SOLENOID
N.C.
V
REDUNDANT BRAKE
BRAKE
TO VACUUM
SOURCE
DIAPHRAGM
51K
BRAKE LIGHT
BRAKE SWITCH
S6
1
2
3
4
5
6
7
8
9
10
11
12
NOTE:
VAC
VENT
1. Open or Closed as Required to Maintain Set Speed Error
H
L
L
VALVE
24
23
22
21
20
19
18
17
16
15
14
13
2.4M
R
NOTE: 1. All Switches Open
GATE
VAC
VENT
EXT
S1 - ON
S2 - RESUME
S3 - ACCEL
S4 - COAST
S5 - OFF
IDLE (Note 1)
HI-SPEED DROPOUT
FUNCTION
V
SWITCH
ACCEL
CC
1M
10K
Close
Open
2.2 F
+
C
H
EXT
L
L
SEE FIGURE 3
SYSTEM MODE
Close (Note 1)
NC (Note 1)
CRUISE
VOLTAGE AT TERM. 3
0.725
0.482
0.148
1.12
0.93
MIN
V
LO-SPEED DROPOUT
10K
10K
0
RATIO TO V
CC
H
L
L
COAST
0.599
0.272
0.094
CC
MAX
0.96
0.8
NC
NC
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