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D. Connect rs-485 cables and set address
1.
select the rs-485 address for the rmC unit.
Each RMC connected to a 200N Control
and monitoring unit must have a unique
address; if two RMC units are assigned
the same address, communications
faults will result.
2.
set the rs-485 address for the rmC
unit.
Use a small flat-blade screwdriver to
rotate the address switch marked "x1"
to the desired address. For an address
of 50, set the "x1" to 0. For an address
of 59, set it to 9. Ensure that the address
switch marked "x10" is set at position 5,
and do not change it from this setting.
Mark the address setting on the RMC
label.
3.
Connect rs-485 cables.
note: Do not make connections to the
RS-485 bus while it is connected to an
operating 200N control and monitoring
unit, or damage and/or alarms could
result.
The RS-485 bus allows units with unique
addresses to be daisy-chained together
along a common bus. To add a new unit
to the network, simply daisy-chain the
RS-485 bus from the last unit to the new
one—or insert the new unit between two
existing units on the bus. The order in
which units are attached to the RS-485
bus does not matter. There are just two
constraints on the RS-485 network:
• E ach RMC must be assigned a unique
address.
• T he RS-485 bus must be a continuous
string from the first unit to the last
unit in the system.
8
To ensure you assign an unique address
to each RMC unit, review the system
layout. If a layout document does not
exist, create one. Assign an unique
address (50–59) to each RMC unit.
RMC label
Set address 0-9
Do not change
from position 5
note: The RS-485 bus operates at 5 V,
and equipment connected to it could
be damaged by exposure to higher
voltages. Take precautions to avoid
exposing the RS-485 wiring to discharge
of static electricity or other sources
of high voltage potential; in particular,
avoid contact with the power supply
wiring.
Connect the clear or white wire of
1
2
3
4
the RS-485 cable to the (+) terminal
as shown.
Connect the black wire of the
1
2
3
4
RS-485 cable to the (–) terminal as
shown.
Connect the shield wire of the
1
2
3
4
RS-485 cable to the shield terminal
as shown.
If connecting two RS-485 cables (one IN
and one OUT), use the same terminals
for both wires.
– – +
OUT DC 24V 2A
Power supply
(typical)
IN AC 100-240V
L(+) NC NC N (–)
Note: Previous wiring omitted for clarity.
note: RMM2 remote monitoring
modules are connected on the same
RS-485 network but have addresses in
another range.
important: Do not connect the shield
of the RS-485 cable to the enclosure or
panel grounding terminal. Connect the
shield only to the terminal provided. To
avoid the potential for spurious ground
loops, the RS-485 cable shield should
be connected to ground only in the 200N
control and monitoring unit.
DC
OK
22,5-28,5
V DC
DC
OK
2
4
6
8
2
Address x 1
1
3
5
7
9
x 10
1
3
RS-485
+ (5)
– (6)
(9)
V IN
ON
TxD
RxD
D1 D2
L
L
CRC
24V 0V
D1 D2
L
IO/RN
IO/ER
N
N
N
750-400 750-612
750-512
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