Mircom FleXNet FNC-2000 Installation And Operation Manual page 45

Wire the ALCN-792M Quad Loop Adder module as shown in Figure 24 below.
Figure 24: ALCN-792M Quad Loop Adder Module
RS-485
RS-485 heartbeat
LED
JW2
- normally shorted, a
jumper is here to enable
watchdog timer.
RS-232
Debug
Interface
heartbeat LED for
on board processor
JTAG PORT
ADDRESS
DIP SWITCH
POWER CABLE
(OUT)
Wiring The Addressable Loops
There are two addressable loops present on this board that are wired in the same manner as shown in
the wiring diagrams beginning with Figure 30. Although these drawings show only Loop 1;Loop 2 is wired
in the same way as Loop 1 is.
Notes for ALCN-792M:
• All circuits are power limited and must use type FPL, FPLR, or FPLP power limited cable.
• Loop wiring: maximum loop resistance is 40 ohms total. These lines power-limited and fully supervised.
LOOP 1
+ - + -
B
A
OUT
P4
Loop 1
Active LED
JW1
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
SW1
POSITION IS ON.
P2
LOOP 2
S S + - + -
ALARM OUT
B
COM (-)
A
Loop 2
Active LED
- normally open,
TM
FleX-Net Installation and Operation Manual
RS-485
CABLE IN
P3
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
P1
(IN)
41