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)
RS 485 (+)RS 485 (-)ACN 24VACMRLDS - INSIDE LOWER PORTION OF BASEEARTH GNDShield drain/groundwire
MODBUS
NETWORK
To GatewayBoard
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 J5J4 J3 J2 J1

refrigerant typejumpersnetworkaddressjumpers termjumper
J6 J1