Mircom Flex-Net Phase II Application Manual page 54

ALCN-792M Quad Loop Controller Module
This is a new module that supports four loops as opposed to the two loops that were be
supported by the ALC-396S Dual Loop Controller Module. The changes described are
compared to the ALC-396S. The P2 Power OUT connector has been moved. The watchdog
and the rest jumpers have also been relocated. There are module additions that did not exist
before such as the JTAG port and the RS-232 Debug Interface. The ALCN-792M is paired with
another board called the ALCN-792D. This is a daughter board which mounts on top of and
connects directly to the ALCN-792M. Refer to the figure below for component positions on the
ALCN-792M.
RS-485
Green flashing
RS-485 heartbeat
LED
JW2
- normally shorted, a
jumper is here to enable
watchdog timer.
RS-232
Debug
Green flashing
Interface
heartbeat LED for
on board processor
JTAG PORT
ADDRESS
DIP SWITCH
POWER CABLE
(OUT)
Note: The RS-232 and JTAG
Ports are for factory use only
LOOP 1
+ - + - S S
B
COM (-)
A
OUT
P4
Loop 1
Active LED
JW1
- normally open,
pins are momentarily
shorted to reset
P5
hardware.
P6
Daughter Board
Connector
DIP SWITCHES ARE FOR THIS
BOARD'S ADDRESS. SW1-1
1
IS THE LEAST SIGNIFICANT
8
DIGIT (BINARY). ACTIVE POSI-
SW1
TION IS ON. REFER TO LT-894.
P2
LOOP 2
+ - + -
ALARM OUT
B
A
Loop 2
Active LED
P3
P1
Appendix A: Hardware Changes
RS-485
CABLE IN
Four shaded
mounting holes are
for Daughter board
ALCN-792D
Top 2 holes and
bottom 2 holes are
used for the ALCN-
792 Quad Loop
Adder module
mounting
POWER CABLE
(IN)
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