46020-1297 <90-00038>
P
AGE
3
F
IG
. 1 - F
UNCTIONAL
S
CHEMATIC
, 46020 M
ULTIPLE
A
LARM
P
ROCESSOR
Binary data to and from the microprocessor through the
systems input/outputs is applied to each port through a series of
protectively buffered ACIAs (Asynchronous Communications
Interface Adapter).
Master Port
The Master Port communicates with an external PC or other
alarm system reporting center through a plug-in subassembly.
Printer Port
The Printer Port communicates with an external dumb terminal,
PC, or other alarm system reporting center through an on-board
RS-232 interface.
Data Port
The Data Port communicates either directly or through a 46022
MAC with the remote alarm and control devices using seven (7)
TTL buses designated:
♦
TXD - Transmit Data
♦
RXD - Receive Data
32
31
30
29
39
41
40
42
23
24
25
26
46
45
43
44
54
51
53
55
50
49
56
52
8
MEMORY
MEMORY
MEMORY
MEMORY
DECODER
PORT 3
(MASTER)
ADR
CPU
ADR
P
ARALLEL INPUT/OUTPUT
35
17
POWER
REGULATOR
1
2
3
4
5
6
7
RXD
CTS
DCD
DSR
TXD
DTR
RTS
47
+5 VDC OUTPUT
-21 TO -56 VDC
PORT 2
(PRINTER)
PORT 1
(DATA)
OPTIONAL
COMMUNICATION
SUB-ASSEMBLY
GROUND
13
9
11
14
10
12
TX DATA (BB)
RX DATA (BA)
DSR
DTR
RTS
DCD
TX+
TX-
RX+
RX-
RS-422/
RS-485
49008
S/A
RTS
RD
DTR*
DCD
GND or CTS*
TD
RS-232
49009 or
49029 S/A
Balanced Output
DIST. XMT
Balanced Input
DIST. RCV
202
Modem
49013
S/A
LEV A ALM
LEV B ALM
LEV C ALM
LEV D ALM
WRT CL 0
WRT CL 1
WRT CL 2
WRT CL 3
CLK 0
CLK 1
CLK 2
CLK 3
CHAN. ADD 0
CHAN. ADD 1
CHAN. ADD 2
CHAN. ADD 3
CARD. ADD 0
CARD. ADD 1
CARD. ADD 2
DATA
WRT
ALM
DIS. REQ
DATA ENB.
EXT. INTERRUPT
MULTIPLE ALARM PROCESSOR,
46020
S1
THRU
S7
DATA
* Available for
49029 Only
22
20
21
19
16
15
CLK ENABLE 37
CIRCUIT DESCRIPTION
CONTINUED
. . .