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6 • MRLDS I&O Manual 026-1307 Rev 4 28-JUN-2011
will see one of the following messages:
•Online - The MRLDS is communicating
normally.
•Offline - The MRLDS is not communicat-
ing, has not been commissioned, is not
functional, or is not powered up. Verify the
MRLDS is powered up, wired correctly,
and has the proper network address, baud
rate, and parity.
•No Port - No port is set up in the E2 Serial
Configuration Manager to be a MODBUS
port.
4 MRLDS Analog
Version (809-100x)
4.1 Network Layout
4.2 MRLDS Wiring
For analog MRLDS units, connect to a MultiFlex
board via the analog input (use Belden 8761 cable).
4.3 Refrigerant Jumper
Settings
The jumper settings for refrigerant types are located on
the label inside the MRLDS sensor cover (shown in Fig-
ure 1-1). Set the jumpers according to how they are indi-
cated on the label.
The MRLDS supports ten different refrigerant types.
Select the desired refrigerant type by setting one jumper to
the J2 or J1 sockets (Figure 2-1) respective per the inside
label.
Figure 4-1
- Analog MRLDS Network Layout Example
E2
MRLDS Units
I/O Net
MultiFlex Board
T
o
O
t
h
e
r
I
/
O
N
e
t
D
e
v
i
c
e
s
Figure 4-2 - Analog MRLDS Wiring
Figure 4-3 - Analog Jumper Layout (Inside Lower Portion of
Cover) Enlarged To Show Detail
ANALOG MRLDS -
INSIDE LOWER PORTION
OF BASE
MULTIFLEX BOARD -
LOWER RIGHT CORNER
INPUT 13
INPUT 14
INPUT 15
INPUT 16
12
34
5
6
7
8
0V
SIG
0V
SIG
SIG SIG
0V 0V
A
C
N
2
4
V
A
C
G
A
S
(
+
)
O
U
T
(
V
)
TO 24VAC, 10VA
CLASS 2 POWER
SUPPLY
Analog MRLDS
to MultiFlex
A transformer must
be shared
between MRLDS
and the MultiFlex
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
transformer.
never
separate
transformer
S
I
G
0V
G
r
o
u
n
d
O
U
T
(
V
)
G
r
o
u
n
d
EARTH SHIELD
NEAR THE MULTIFLEX
BOARD. CONNECT
THE SHIELD TO THE 0V INPUT
ON THE MULTIFLEX BOARD.
DO NOT
Wire MultiFlex SIG to MRLDS OUT(V).
Wire MultiFlex 0V to MRLDS Ground ( ).
BELDEN
8761
BELDEN
8761
J2 J1
refrigerant
type
jumpers
Analog Jumpers
J2
J1
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