P
AGE
4
46023-12-0399 <90-00009>
F
IG
. 1 - F
UNCTIONAL
S
CHEMATIC
, 46023-12
CHANNEL ADDR 3
TX
RX
DCD
RTS
TX
RX
1
2
19
20
RS-422
Driver &
Receiver
INPUT/
OUTPUT
INTERFACE
3
4
21
22
15
16
33
34
MICROPROCESSOR
AND
ASSOCIATED
CIRCUITRY
CARD ADDRESS SWITCH (S1)
40
39
41
48
INPUT/
OUTPUT
INTERFACE
51
54
53
42
45
44
43
36
56
55
50
45
49
47
POWER SUPPLY
SUBASSEMBLY
17
35
DISPLAY
DRIVER
FRONT PANEL
LEDs
AND
SWITCHES
CARD
SELECT
CHANNEL
SELECT
DISPLAY
CONTROL
TO:
MATs,
CPMs,
ETC.
PORT
2
TX
RX
TX
RX
+
-
+
-
OUTPUTS
INPUTS
+
-
+
-
+
-
+
-
DISPLAY
DRIVER
INTERFACE
CARD ADDR 2
CARD ADDR 1
CARD ADDR 0
CHANNEL ADDR 2
CHANNEL ADDR 1
CHANNEL ADDR 0
DATA
WRITE
ALM
DISPLAY REQUEST
- 12V
+ 12V
+ 5V
GROUND
- BATT
RS-422
Driver &
Receiver
RS-422
Driver &
Receiver
PORT
1
PORT
8
TO:
MATs,
CPMs,
ETC.
CIRCUIT DESCRIPTION
