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Figure 81 – Multiple ACU Communication - CB-485M/CB-485/MC33H
See Communication Jumper J16 for multiple ACUs with CB-485M/CB-485s on page 106.
MC33H
Modem
RJ 11 Terminal
- connect to analog
phone line
Current Draw 360 mA
connect to
analog phone
TX
LED
line
GND
TD
RD
NC
RJ11
Terminal
Jumper ON
J1
(First & Last CB-485)
TX
LED
GND
TD
RD
NC
CAT 5
J1
Jumper
OFF J1
TX
LED
GND
TD
RD
NC
CAT 5
+
J1
Jumper ON
J1
(First & Last
CB-485)
Keyscan Technical Guide (PC109x - 04.12)
MC33H jumper - DCE
RS-232 Modem Cable
12 VDC Adaptor
(plug on reverse side)
RX
LED
B
LED
Modem
Chip
CB-485M
DCD
RING
RS485 IN
RS485 OUT
M
+
-
+
-
+
-
+
-
Run
Program
RX
LED
Current Draw - 110 mA
CB-485
Jumpers
RS485 IN
RS485 OUT
M
+
-
+
-
+
-
+
-
ON Run
Run
Program
RX
LED
Current Draw - 110 mA
CB-485
Jumpers
RS485 IN
RS485 OUT
M
-
+
-
+
-
+
-
ON Run
Run
Program
Parts List
to Com Port
PC with
Communication
Manager
Jumpers
ON
Run
CAT 5
- RS-485 cable maximum 2000 ft (609 m) @ 9600 BPS
between CB-485s
- may substitute equivalent to CAT 5 - 3 twisted pairs
- maximum baud rate is 19,200 with CB-485M
CPB/CB MODULE
(COM4)
Control
Board
(PC 109x)
H1
H2
Common
AUX Inputs - E
- PC
- CAT 5 Cable - 3 twisted pairs
- Control Board
- CB-485
- CB-485M
- MC33H Modem
- RS-232 Modem Cable
- Dedicated Analog Phone Line
Connect CB-485 ribbon cable
to CPB/CB MODULE terminal
on control board.
Important
Jumper ON
J16 – G to
activate CPB/
CB MODULE
(H1) terminal.
TX
RX
LED
LED
CB-485
KI-00184E-07-11
104
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