Page1of 1
Filename: 203rly.tcw
Date: 12/20/97
By:R. Fenske
203RLY-A
SCHEMATIC
7812
C2
C1
1000uF
R23
10K
Q10
2N3903
+12V
10K
R1
2N3903
RELAY 1
NOCNC
A
LAWSON
BOARD
TO
+12V
A
1
3
4
5
2
8
7
6
+12V
+12V
R22
1M
C13
.01uF
U2
555
TIMER
R21
10M
C11
0.2uF
C12
.01uF
+12V
R24 1K
IN
OUT
GND
Q1
REMOTESTARTCIRCUIT
10K
R2
2N3903
RELAY2
B
LAWSON
BOARD
TO
+12V
B
Q2
10K
R3
2N3903
RELAY 3
C
LAWSON
BOARD
TO
+12V
C
Q3
10K
R4
2N3903
RELAY 4
D
LAWSON
BOARD
TO
+12V
D
Q4
10K
R5
2N3903
RELAY 5
E
LAWSON
BOARD
TO
+12V
E
Q5
10K
R6
2N3903
RELAY6
F
LAWSON
BOARD
TO
+12V
F
Q6
10K
R7
2N3903
RELAY7
G
LAWSON
BOARD
TO
+12V
G
Q7
10K
R8
2N3903
RELAY8
H
LAWSON
BOARD
TO
+12V
H
Q8
(MOMENTARYGROUNDINGOFTHE INPUT
PRODUCESA2SECONDNEGATIVEGOINGPULSE
ONTHEOUTPUTWHICHTRIGGERSTHE
203A/DBOARDREMOTESTARTFUNCTION.)
ALSOSUPPLIES
+12VANDGROUND
TOTHE203A/DBOARD
15 - 24Vdc INPUTFROM
WALLTRANSFORMER
1000uF
+12V
GROUND
POWERSUPPLY
R9
2K
POWER
INDICATOR
LED
OPTIONALRELAYCIRCUITS:
USEDWHENACONTACTCLOSURE
ISNEEDEDFORACTIVATION
OFEXTERNALDEVICES.
NOCNC
NOCNC
NOCNC
NOCNC
NOCNC
NOCNC
NOCNC
