P
AGE
4
49018-0697 <90-00089>
F
IG
1 - 49018 F
UNCTIONAL
S
CHEMATIC
CIRCUIT DESCRIPTION
CLR
OUTPUT
{
A
B
C
D
P1 - 1
P1 - 2
P1 - 3
P1 - 4
BCD
INPUT
DIGIT 1
DIGIT 0
P2 - 6
P2 - 5
0/1
SET
P2 - 10
CLR
A
SUPERVISORY
DECODER
DRIVER
DRIVER
DRIVER
*
#C
TO 4 BIT ADDR COMP
STATION 2
-10 VDC
P2 - 3
STATION 1
OUTPUT
CKT 1
-10 VDC
P2 - 4
STATION 2
OUTPUT
CKT 2
P2 - 11
DIGIT
COUNTER
FROM
BCD
BUSS
Q1
RING
GENERATOR
START
NOTE: SYMBOLS ARE FUNCTIONAL LOGIC ONLY
DELAY
ENABLE
DIGIT SELECT
1
23
BUSY
RESET
PULSE
STATION 2
ADDRESS
COMPAR-
ATOR
STATION 2
DRIVER
INTER-DIGIT
AND RESET TIMER
Q
BUSY
LATCH
C
Q
S
DRIVER
P2 - 12
P2 - 7
P1 - 10
P1 - 12
REFERENCE
-10VDC
GND
P1 - 5
P2 - 8
P2 - 9
STATION 2
ADDRESS
LATCH
D2 D3
CLOCK PULSE
DELAY CIRCUIT
IN
OUT
RESET
STATION 1
ADDRESS
COMPAR-
ATOR
STATION 1
ADDRESS
LATCH
STROBE-IN
RESET
PWR-UP CLR
PWR-UP BUSY
BUSY OUT
BCD BUSS
ADDRESS
BUFFER
LATCH
CLK
CLR
STATION 1
DRIVER