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Network Layout MRLDS Modbus Version (809-101x) • 5
3.4.3 RMCC Controllers
For RMCC-type controllers, set the Gain parameter to
250 and Offset to -1000.
4MRLDS Modbus
Version (809-101x)
4.1 Network Layout
4.2 MRLDS Setup
4.2.1 MRLDS Wiring
4.2.2 MRLDS Network Addressing
Modbus network settings are set on jumpers J5, J4,
and J3. Refer to Table 4-1 (also included on the inside
label of the MRLDS) for network addressing with corre-
sponding jumper settings.
If more than one MRLDS is on the network, each unit
must have a unique address and be numbered according to
the inside label (Table 4-1) specifications.
Figure 3-4
- Analog Input Screen Settings Example for E2
Figure 4-1 - Network Layout Example
E2
Gateway
MRLDS
MRLDS
MRLDS
MRLDS
I/O Net
+
-
+
-
-
-
-
-
+
+
+
+
MODBUS
(Up to 12 MRLDS
units on the networ
k
per Gatewa
y)
Figure 4-2 - Modbus MRLDS Wiring
Figure 4-3 - MRLDS Jumpers (Inside Lower Portion of Cover)
R
S
4
8
5
(
+
)
R
S
4
8
5
(
-
)
A
C
N
2
4
V
A
C
MRLDS - INSIDE LOWER
PORTION OF BASE
E
A
R
T
H
G
N
D
Shield
drain/ground
wire
MODBUS
NETWORK
To Gateway
Board
A transformer must
be shared
between MRLDS
and the Gateway
board. A
must
be used.
If a transformer is
shared between
MRLDS units,
the “ACN” of
each MRLDS
must be wired
to the same
phase of the
t
r
a
n
s
f
o
rm
e
r.
never
separate
transformer
MODBUS
BELDEN
8761
14 AWG less
than 6 inches
J6
J5 J4 J3
J2 J1
refrigerant
type
jumpers
network
address
jumpers
term
jumper
J6
J1