Mrlds Modbus Version (809-101X); Network Layout; Mrlds Setup - Emerson MRLDS Operation Manual

Figure 3-4
- Analog Input Screen Settings Example for E2
3.4.3 RMCC Controllers
For RMCC-type controllers, set the Gain parameter to
250 and Offset to -1000.
4 MRLDS Modbus
Version (809-101x)
4.1

Network Layout

E2
+
-
MODBUS
Figure 4-1
- Network Layout Example
Network Layout
I/O Net
-
+
Gateway
+
MRLDS
-
+
MRLDS
-
+
MRLDS
-
+
- MRLDS
(Up to 12 MRLDS
units on the network
per Gateway)
4.2

MRLDS Setup

4.2.1 MRLDS Wiring
MODBUS
MRLDS - INSIDE LOWER
PORTION OF BASE
14 AWG less
than 6 inches
MODBUS
Shield
NETWORK
drain/ground
BELDEN
8761
wire
Figure 4-2
- Modbus 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.
J6 J1
J6 J5 J4 J3 J2 J1
term
jumper
Figure 4-3
- MRLDS Jumpers (Inside Lower Portion of Cover)

MRLDS Modbus Version (809-101x)

To Gateway
Board
A transformer must
never be shared
between MRLDS
and the Gateway
board. A separate
transformer 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
transformer.
refrigerant
network
type
address
jumpers
jumpers
•
5